NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

(1)      Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements of BorgWarner Inc. and Consolidated Subsidiaries (the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes necessary for a comprehensive presentation of financial position, results of operations and cash flow activity required by GAAP for complete financial statements. In the opinion of management, all normal recurring adjustments necessary for a fair statement of results have been included. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. The balance sheet as of December 31, 2017 was derived from the audited financial statements as of that date. For further information, refer to the Consolidated Financial Statements and Footnotes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017. As disclosed in the Form 8-K dated June 15, 2018, the Company announced that it would restate its consolidated financial statements for the fiscal years ended December 31, 2016 and 2015 included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017, due to the Company’s re-evaluation of its accounting in those years for the estimated value of asbestos-related claims that had not yet been asserted and their associated defense costs. The restatement does not affect the current financial results reported on this Quarterly Report on Form 10-Q, nor does it affect the Company’s previously reported results for the fiscal year ended December 31, 2017. For more information concerning the restatement, please see the Current Report on Form 8-K filed by the Company with the Securities and Exchange Commission ("SEC") on June 15, 2018.

Certain prior period amounts have been reclassified to conform to current period presentation. During the fourth quarter of 2017, the Company identified a prior period error related to the exclusion of the net earnings attributable to the non-controlling interest in the first three and six months of 2017 Consolidated Statement of Comprehensive Income. The inclusion of this amount increased total Comprehensive Income by $9.1 million and $19.5 million for the three and six months ended June 30, 2017, respectively.

The Company concluded that the error was not material to the financial statements of any prior annual or interim period and therefore, amendments of previously filed reports are not required. In accordance with ASC Topic 250, "Accounting Changes and Error Corrections," we have corrected the error for all prior periods presented by revising the consolidated financial statements appearing herein. Quarterly periods not presented herein will be revised, as applicable, in future filings. The revision had no impact on the Consolidated Balance Sheets, Consolidated Statements of Operations, Consolidated Statements of Cash Flows.

Management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and accompanying notes, as well as, the amounts of revenues and expenses reported during the periods covered by those financial statements and accompanying notes. Actual results could differ from these estimates.

(2) New Accounting Pronouncements

In February 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2018-07, "Compensation - Stock Compensation (Topic 718)." It expands the scope of the employee share-based payments guidance, which currently only includes share-based payments issued to employees, to also include share-based payments issued to nonemployees for goods and services. This guidance is effective for interim and annual periods beginning after December 15, 2018. Early adoption is

permitted. The Company does not expect this guidance to have a material impact on its consolidated financial statements.

In February 2018, the FASB issued ASU No. 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220)." It allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 ("the Tax Act"). In addition, the new guidance requires expanded disclosures including a description of the accounting policy releasing disproportionate income tax effects from accumulated other comprehensive income. This guidance is effective for interim and annual periods beginning after December 15, 2018. Early adoption is permitted. The Company is currently evaluating the impact that this guidance will have on its consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815)." It expands and refines hedge accounting for both nonfinancial and financial risk components and reduces complexity in fair value hedges of interest rate risk. It eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. It also eases certain documentation and assessment requirements and modifies the accounting for components excluded from assessment of hedge effectiveness. In addition, the new guidance requires expanded disclosures as it pertains to the effect of hedging on individual income statement lines, including the effects of components excluded from the assessment of effectiveness. The guidance is effective prospectively for interim and annual periods beginning after December 15, 2018. Early adoption is permitted. The Company adopted this guidance during the first quarter of 2018 and the impact on the consolidated financial statements was not material. Refer to the Financial Instruments footnote to the Condensed Consolidated Financial Statements for expanded disclosures.

In March 2017, the FASB issued ASU No. 2017-07, "Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." It requires disaggregating the service cost component from the other components of net benefit cost, provides explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allows only the service cost component of net benefit cost to be eligible for capitalization when applicable. This guidance is effective for interim and annual periods beginning after December 15, 2017.   During the first quarter of 2018, the Company retrospectively adopted the presentation of service cost separate from the other components of net benefit costs. As a result, Cost of sales of $1.3 million and $2.3 million and Selling, general and administrative expenses of $0.1 million and $0.3 million for the three and six months ended June 30, 2017, respectively, have been reclassified to Other postretirement income as a separate line item in the Condensed Consolidated Statements of Operations.

In January 2017, the FASB issued ASU No. 2017-01, "Clarifying the Definition of a Business." It revises the definition of a business and provides a framework to evaluate when an input and a substantive process are present in an acquisition to be considered a business. This guidance is effective for annual periods beginning after December 15, 2017. The Company adopted this guidance in the first quarter of 2018 and there is no impact to the consolidated financial statements.

In November 2016, the FASB issued ASU No. 2016-18, "Restricted Cash." It requires that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This guidance is effective for interim and annual reporting periods beginning after December 15, 2017. The Company adopted this guidance in the first quarter of 2018 and there is no impact to the consolidated financial statements.

In August 2016, the FASB issued ASU No. 2016-15, "Classification of Certain Cash Receipts and Cash Payments." It provides guidance on eight specific cash flow issues with the objective of reducing the existing

diversity in practice in how they are classified in the statement of cash flows. This guidance is effective for interim and annual reporting periods beginning after December 15, 2017. The Company adopted this guidance in the first quarter of 2018 and there is no impact to the consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326)." It replaces the current incurred loss impairment method with a new method that reflects expected credit losses. Under this new model an entity would recognize an impairment allowance equal to its current estimate of credit losses on financial assets measured at amortized cost. This guidance is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)." Under this guidance, lessees will be required to recognize a right-of-use asset and a lease liability for most leases, including operating leases defined under previous GAAP. Adoption will require a modified retrospective transition with an option to apply the transition provisions of the new standard at its adoption date instead of at the earliest comparative period presented. This guidance is effective for interim and annual reporting periods beginning after December 15, 2018. The Company is currently evaluating all forms of leasing arrangements and determining potential system requirements that will be necessary to implement the new standard. Based on the results of the assessment, the Company will refine its internal policy to include criteria for evaluating the impact of the new standard and also implement appropriate refinements to business processes, systems and controls to support the requirements of this new standard in the second half of 2018. The Company continues to evaluate the impact this guidance will have on its consolidated financial statements.

In January 2016, the FASB issued ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities." It requires equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. It also requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. This guidance is effective for interim and fiscal years beginning after December 15, 2017. The Company adopted this guidance in the first quarter of 2018 with no impact to the consolidated financial statements and elected the measurement alternative for equity investments without readily determinable fair values.

In May 2014, the FASB amended the Accounting Standards Codification to add Topic 606 and issued ASU 2014-09, "Revenue from Contracts with Customers," outlining a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and superseding the then applicable revenue recognition guidance. The new guidance requires new disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. We adopted this new standard and all the related amendments (“new revenue standard”) effective January 1, 2018 and applied it to all contracts using the modified retrospective method. We recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. We expect the impact of adoption of the new standard to be immaterial to our sales and net income on an ongoing basis.

Revenue is recognized when performance obligations under the terms of a contract are satisfied, which generally occurs with the transfer of control of our products. For most of our products, transfer of control occurs upon shipment or delivery, however, a limited number of our customer arrangements for our highly customized products with no alternative use provide us with the right to payment during the production process. As a result, for these limited arrangements, under the new revenue standard, revenue is recognized

as goods are produced and control transfers to the customer. The Company recorded a transition adjustment as of January 1, 2018, which increased retained earnings by $2.0 million related to these arrangements.

The Company also has a limited number of arrangements with customers where the price paid by the customer is dependent on the volume of product purchased over the term of the arrangement. Under the new revenue standard, the Company estimates the volumes to be sold over the term of the arrangement and recognizes revenue based on the estimated amount of consideration to be received from these arrangements. The Company recorded a transition adjustment, which decreased the opening balance of retained earnings by $0.1 million related to these arrangements.

The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet for the adoption of new revenue standard was as follows:

(In millions)		Balance at December 31, 2017				Adjustments due to ASC 606				Balance at January 1, 2018
Inventories, net		$	766.3			$	(7.4	)		$	758.9
Prepayments and other current assets (including contract assets)		$	145.4			$	9.4			$	154.8
Accounts payable and other accrued expenses (including contract liabilities)		$	2,270.3			$	0.1			$	2,270.4
Retained earnings		$	4,531.0			$	1.9			$	4,532.9

The impact from adopting the new revenue standard as compared to the previous revenue guidance is immaterial to our Consolidated Statements of Operations for the three and six months ended June 30, 2018 and Consolidated Balance Sheets as of June 30, 2018.

(3) Revenue from Contracts with Customers

The Company adopted the new accounting standard ASC 606, Revenue from Contracts with Customers and all the related amendments to all contracts using the modified retrospective method effective January 1, 2018. The Company manufactures and sells products, primarily to OEMs of light vehicles, and, to a lesser extent, to other OEMs of commercial vehicles, off-highway vehicles, certain Tier One vehicle systems suppliers and into the aftermarket. Although the Company may enter into long-term supply arrangements with its major customers, the prices and volumes are not fixed over the life of the arrangements, and a contract does not exist for purposes of applying ASC 606 until volumes are contractually known. Revenue is recognized when performance obligations under the terms of a contract are satisfied which generally occurs with the transfer of control of our products. For most of our products, transfer of control occurs upon shipment or delivery, however, a limited number of our customer arrangements for our highly customized products with no alternative use provide us with the right to payment during the production process. As a result, for these limited arrangements, revenue is recognized as goods are produced and control transfers to the customer. The Company recorded a contract asset of $10.7 million and $9.4 million at June 30, 2018 and January 1, 2018 for these arrangements. These amounts are reflected in Prepayments and other current assets in our consolidated balance sheet.

Revenue is measured at the amount of consideration we expect to receive in exchange for transferring the goods. The Company has a limited number of arrangements with customers where the price paid by the customer is dependent on the volume of product purchased over the term of the arrangement. In other limited arrangements, the Company will provide a rebate to customers based on the volume of products purchased during the course of the arrangement. The Company estimates the volumes to be sold over the term of the arrangement and recognizes revenue based on the estimated amount of consideration to be received from these arrangements. As a result of these arrangements, the Company recognized a liability of $10.9 million and $18.4 million at June 30, 2018 and December 31, 2017. These amounts are reflected in Accounts payable and accrued expenses in our consolidated balance sheet.

The Company’s payment terms with customers are customary and vary by customer and geography but typically range from 30 to 90 days. We have evaluated the terms of our arrangements and determined that they do not contain significant financing components. The Company provides warranties on some of its products. Provisions for estimated expenses related to product warranty are made at the time products are sold. See the Product Warranty footnote to the Consolidated Financial Statements for more information on product warranties. Shipping and handling fees billed to customers are included in sales, while costs of shipping and handling are included in cost of sales. The Company has elected to apply the accounting policy election available under ASC 606 and accounts for shipping and handling activities as a fulfillment cost.

In limited instances, certain customers have provided payments in advance of receiving related products, typically at the onset of an arrangement prior to the beginning of production. These contract liabilities are reflected as Accounts payable and accrued expenses and Other non-current liabilities in our consolidated balance sheet and were $11.9 million and $19.3 million at June 30, 2018 and $12.1 million and $21.9 million at December 31, 2017, respectively. These amounts are reflected as revenue over the term of the arrangement (typically 3 to 7 years) as the underlying products are shipped.

The Company continually seeks business development opportunities and at times provides customer incentives for new program awards. The Company evaluates the underlying economics of each amount of consideration payable to a customer to determine the proper accounting by understanding the reasons for the payment, the rights and obligations resulting from the payment, the nature of the promise in the contract, and other relevant facts and circumstances. When the Company determines that the payments are incremental and incurred only if the new business is obtained and expects to recover these costs from the customer over the term of the new business arrangement, the Company capitalizes these costs. The Company recognizes a reduction to revenue as products that the upfront payments are related to are transferred to the customer based on the total amount of products expected to be sold over the term of the arrangement (generally 3 to 7 years). The Company evaluates the amounts capitalized each period end for recoverability and expenses any amounts that are no longer expected to be recovered over the term of the business arrangement. The Company had $25.5 million and $18.2 million recorded in Prepayments and other current assets, and $172.4 million and $180.4 million recorded in Other non-current assets in the consolidated balance sheet at June 30, 2018 and December 31, 2017.

The following table represents a disaggregation of revenue from contracts with customers by segment and region:

(4) Research and Development Expenditures

The Company's net Research & Development ("R&D") expenditures are included in selling, general and administrative expenses of the Condensed Consolidated Statements of Operations. Customer reimbursements are netted against gross R&D expenditures as they are considered a recovery of cost. Customer reimbursements for prototypes are recorded net of prototype costs based on customer contracts, typically either when the prototype is shipped or when it is accepted by the customer. Customer reimbursements for engineering services are recorded when performance obligations are satisfied in accordance with the contract and accepted by the customer. Financial risks and rewards transfer upon shipment, acceptance of a prototype component by the customer or upon completion of the performance obligation, as stated in the respective customer agreement.

The following table presents the Company’s gross and net expenditures on R&D activities:

The Company has contracts with several customers at the Company's various R&D locations. No such contract exceeded 5% of annual net R&D expenditures in any of the periods presented.

(5) Other Expense, net

Items included in other expense, net consist of:

During the three and six months ended June 30, 2018, the Company recorded restructuring expense of $31.2 million and $38.7 million , respectively. This restructuring expense primarily relates to Drivetrain and Engine segment actions designed to improve future profitability and competitiveness. See the Restructuring footnote to the Condensed Consolidated Financial Statements for further discussion of these expenses.

During the three and six months ended June 30, 2018, the Company recorded $1.0 million and $3.2 million of merger, acquisition and divestiture expense primarily related to professional fees associated with divestiture activities for the non-core pipe and thermostat product lines, respectively. See the Assets and Liabilities Held for Sale footnote to the Condensed Consolidated Financial Statements for further discussion.

During the first three months of 2018, the Company recorded a gain of approximately $4.0 million related to the settlement of a commercial contract for an entity acquired in the 2015 Remy acquisition.

During the first three months of 2017, the Company recorded a loss of $5.3 million related to the termination of a long term property lease for a manufacturing facility located in Europe.

(6) Income Taxes

The Company's provision for income taxes is based upon an estimated annual tax rate for the year applied to federal, state and foreign income. On a quarterly basis, the annual effective tax rate is adjusted, as appropriate, based upon changed facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter.

At June 30, 2018, the Company's effective tax rate for the first six months was 19.4% . This rate includes income tax expenses of $0.9 million related to a commercial settlement gain, and reductions of income tax expense of $8.2 million related to restructuring expense, $0.3 million related to merger and acquisition expense, $13.4 million related to adjustments to measurement period provisional estimates associated with the Tax Act, $21.1 million related to an increase to our deferred tax asset due to the Company's ability to record a tax benefit for certain foreign tax credits now available due to actions the Company took in the second quarter, and $9.5 million for other one-time tax adjustments.

At June 30, 2017, the Company's effective tax rate for the first six months was 27.9% . This rate includes a reduction of income tax expense of $6.6 million related to one-time tax adjustments, primarily resulting from tax audit settlements.

The annual effective tax rates differ from the U.S. statutory rate primarily due to foreign rates which differ from those in the U.S., U.S. taxes on foreign earnings, the realization of certain business tax credits, including foreign tax credits, and favorable permanent differences between book and tax treatment for certain items, including equity in affiliates' earnings.

In accordance with guidance provided by Staff Accounting Bulletin No 118 (SAB 118), we have not completed our accounting for the tax effects of the Tax Act and have recorded provisional estimates for significant items including the following: (i) the effects on our existing deferred balances, (ii) the one-time transition tax, and (iii) our indefinite reinvestment assertion. The measurement period begins in the reporting period that includes the Tax Act’s enactment date and ends when the additional information is obtained, prepared, or analyzed to complete the accounting requirements under ASC Topic 740. The measurement period should not extend beyond one year from the enactment date.

As of June 30, 2018, the Company evaluated the provisional amounts initially recorded for the year ended December 31, 2017 and recorded adjustments based on updates to the Company's assumptions and the application of additional interpretative guidance issued in the second quarter of 2018. These adjustments resulted in (i) an increase in our existing deferred tax asset balances (ii) a net decrease to the one-time transition tax, and (iii) a decrease in the deferred tax liability associated with our indefinite reinvestment assertion totaling a net tax benefit of $13.4 million in the second quarter of 2018. The Company will continue to evaluate the provisional amounts recorded for the year ended December 31, 2017 throughout the remainder of the measurement period.

Deferred tax assets, which are reflected in Other non-current assets in our consolidated balance sheet, increased from $121.2 million at December 31, 2017 to $170.5 million at June 30, 2018, primarily due to the Company’s ability to record a tax benefit for certain foreign tax credits now available in the second quarter of 2018.

We have made an accounting policy election to treat the future tax impacts of the global intangible low tax income (GILTI) provisions of the Tax Act as a period cost to the extent applicable.

(7) Inventories, net

Certain U.S. inventories are measured by the last-in, first-out (“LIFO”) method at the lower of cost or market, while other U.S. and foreign operations use the first-in, first-out (“FIFO”) or average-cost methods at the lower of cost and net realizable value. Inventories consisted of the following:

As of June 30, 2018 and December 31, 2017, accounts payable of $62.1 million and $106.5 million , respectively, were related to property, plant and equipment purchases.

Interest costs capitalized for the six months ended June 30, 2018 and 2017 were $11.1 million and $9.2 million , respectively.

(9) Product Warranty

The Company provides warranties on some, but not all, of its products. The warranty terms are typically from one to three years. Provisions for estimated expenses related to product warranty are made at the time products are sold. These estimates are established using historical information about the nature, frequency and average cost of warranty claim settlements as well as product manufacturing and industry developments and recoveries from third parties. Management actively studies trends of warranty claims and takes action to improve product quality and minimize warranty claims. Management believes that the warranty accrual is appropriate; however, actual claims incurred could differ from the original estimates, requiring adjustments to the accrual.

The following table summarizes the activity in the product warranty accrual accounts:

In the six months ended June 30, 2018, warranty provisions decreased by $8.6 million from the same period in 2017 as the result of fewer product defect claims from customers in the Company's Engine segment.

The product warranty liability is classified in the Condensed Consolidated Balance Sheets as follows:

(10) Notes Payable and Long-Term Debt

As of June 30, 2018 and December 31, 2017, the Company had short-term and long-term debt outstanding as follows:

In July 2016, the Company terminated interest rate swaps which had the effect of converting $384.0 million of fixed rate notes to variable rates. The gain on the termination was recorded as an increase to the notes and is being amortized as a reduction to interest expense over the remaining terms of the notes. The unamortized gain related to these swap terminations as of June 30, 2018 was $2.4 million and $0.6 million on the 4.625% and 8.00% notes, respectively. The unamortized gain related to these swap terminations as of December 31, 2017 was $2.9 million and $0.8 million on the 4.625% and 8.00% notes, respectively.

The Company terminated fixed to floating interest rate swaps in 2009. The gain on the termination was recorded as an increase to the notes and is being amortized as a reduction to interest expense over the remaining term of the notes. The unamortized gain related to this swap termination at June 30, 2018 and December 31, 2017 was $1.9 million and $2.7 million , respectively, on the 8.00% notes.

The weighted average interest rate on short-term borrowings outstanding as of June 30, 2018 and December 31, 2017 was 3.2% and 3.1% , respectively. The weighted average interest rate on all borrowings outstanding, including the effects of outstanding swaps, as of June 30, 2018 and December 31, 2017 was 3.4% and 3.8% , respectively.

The Company has a $1.2 billion multi-currency revolving credit facility, which includes a feature that allows the Company's borrowings to be increased to $1.5 billion . The facility provides for borrowings through June 29, 2022 . The Company has one key financial covenant as part of the credit agreement which is a debt to EBITDA ("Earnings Before Interest, Taxes, Depreciation and Amortization") ratio. The Company was in compliance with the financial covenant at June 30, 2018. At June 30, 2018 and December 31, 2017, the Company had no outstanding borrowings under this facility.

The Company's commercial paper program allows the Company to issue short-term, unsecured commercial paper notes up to a maximum aggregate principal amount outstanding of $1.2 billion . Under this program, the Company may issue notes from time to time and will use the proceeds for general corporate purposes. The Company had no outstanding borrowings under this program as of June 30, 2018 and December 31, 2017.

The total current combined borrowing capacity under the multi-currency revolving credit facility and commercial paper program cannot exceed $1.2 billion .

As of June 30, 2018 and December 31, 2017, the estimated fair values of the Company’s senior unsecured notes totaled $2,153.8 million and $2,209.1 million , respectively. The estimated fair values were $77.2 million and $116.1 million higher than their carrying value at June 30, 2018 and December 31, 2017, respectively. Fair market values of the senior unsecured notes are developed using observable values for similar debt instruments, which are considered Level 2 inputs as defined by ASC Topic 820. The carrying values of the Company's multi-currency revolving credit facility and commercial paper program approximates fair value. The fair value estimates do not necessarily reflect the values the Company could realize in the current markets.

The Company had outstanding letters of credit of $29.3 million and $31.4 million at June 30, 2018 and December 31, 2017, respectively. The letters of credit typically act as guarantees of payment to certain third parties in accordance with specified terms and conditions.

(11) Fair Value Measurements

ASC Topic 820 emphasizes that fair value is a market-based measurement, not an entity specific measurement. Therefore, a fair value measurement should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC Topic 820 establishes a fair value hierarchy, which prioritizes the inputs used in measuring fair values as follows:

Assets and liabilities measured at fair value are based on one or more of the following three valuation techniques noted in ASC Topic 820:

The following tables classify assets and liabilities measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017: