Investor Presentation

May 2021 NYSE: TEN Safe Harbor Forward-Looking Statements

This communication contains forward-looking statements. These forward-looking statements include, but are not limited to, (i) all statements, other than statements of historical fact, included in this communication that address activities, events or developments that we expect or anticipate will or may occur in the future or that depend on future events and (ii) statements about our future business plans and strategy and other statements that describe Tenneco’s outlook, objectives, plans, intentions or goals, and any discussion of future operating or financial performance. These forward-looking statements are included in various sections of this communication and the words “may,” “will,” “believe,” “should,” “could,” “plan,” “expect,” “anticipate,” “estimate,” and similar expressions (and variations thereof) are intended to identify forward-looking statements. Forward-looking statements included in this communication concern, among other things, future performance improvement plans; future financial and operating results; and other statements that are not historical facts. Forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to materially differ from those described in the forward-looking statements, including the course of the COVID-19 pandemic and its impact on general economic, business and market conditions: our ability (or inability) to execute on our plans to respond to the COVID-19 pandemic and our previously announced Accelerate plan and to realize the anticipated benefits of these actions; our financial flexibility in addressing the impact of the COVID-19 pandemic; our ability to maintain compliance with the agreements governing our indebtedness and otherwise have sufficient liquidity through the COVID-19 pandemic; the possibility that Tenneco may not complete a separation of the Aftermarket & Ride Performance business from the Powertrain Technology business; the possibility that Tenneco will be unable to execute on its strategy and maintain compliance with the covenants in its Credit Agreement; the ability to retain and hire key personnel and maintain relationships with customers, suppliers or other business partners; changes in customer preferences, including our ability to realize the revenues represented by our awarded book of business; as well as the risk factors and cautionary statements included in Tenneco's periodic and current reports (Forms 10-K, 10-Q and 8-K) filed from time to time with the SEC. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results. Unless otherwise indicated, the forward-looking statements in this release are made as of the date of this communication, and, except as required by law, Tenneco does not undertake any obligation, and disclaims any obligation, to publicly disclose revisions or updates to any forward-looking statements. Additional information regarding these risk factors and uncertainties is detailed from time to time in the company's SEC filings, including but not limited to its annual report on Form 10-K for the year ended December 31, 2020 and the quarterly report on Form 10-Q for the quarter ended March 31, 2021.

In addition, please see Tenneco’s press release issued on May 6, 2021 for factors that could cause Tenneco’s future performance to vary from the expectations expressed or implied by the forward-looking statements herein and for certain reconciliations of GAAP to non-GAAP results.

2 Tenneco Overview Advantaged scale and diversification in product lines, end markets and regions

$15.4B Revenue Product Applications 2020 Revenue $12.0B Value-add (VA) Revenue VA Revenue

$2.7B Motorparts Powertrain* $3.4B Aftermarket & OES Operating OE LV 39% Emissions/Engine 61% Segments non OE light VA Revenue vehicle ICE $2.5B Performance Solutions* 15% Clean Air $3.4B Commercial truck, 14% Off-Highway, Industrial & Other OE LV Suspension/NVH/Chassis

North America ROW • Diversified and balanced portfolio with 60%+ of VA Revenue unrelated to OE 8% 42% light vehicle internal combustion engine product lines

• Accelerate+ program driving margin expansion & cash generation performance China 14% + Regions - Accelerate expected to generate $265M run rate savings by end of 2021 (2019 base year) VA Revenue - $250M working capital improvement achieved by YE 2020 – 1 year early

• Strong emphasis on free cash flow generation and net debt reduction to enhance shareholder value 36% Europe

*Beginning in the first quarter 2021, Ride Performance segment was renamed Performance Solutions. Recast for a business line transfer from Powertrain to Performance Solutions. See page 14. 3 A Diversified and Balanced Portfolio Leading Positions and Complementary Roles

Global market leader in each business segment - #1 or #2 in all major regions

VA Revenue $2.7B$2.5B $3.4B $3.4B 2020 Motorparts Performance Solutions* Clean Air Powertrain*

• Global automotive aftermarket • Vehicle ride and NVH • Engine emissions control and • Engine component solutions leader; ‘house of 30+ brands' management solutions acoustic performance for improved efficiency and • 7 product categories with • Accelerating growth on light solutions durability customer value-add services vehicle BEV platforms • Applications for light vehicle, • Growing revenue in • Global end to end supply • Intelligent suspension commercial truck & off- commercial truck, off-highway chain capabilities technologies align with highway and industrial applications autonomous vehicle trends • Advantaged scale and • Continuing regulation-driven • Improving margin and cash • High single digit growth operating model to enable demand in CTOH applications generation profile secured thru 2025 in above market growth in North engineered solutions business • Strong cash generator America, EMEA & China lines (AST, NVH, SysPro)

Portfolio Role Invest to Grow Free Cash Flow

Growth engines of the company Cash engines of the company

*Beginning in the first quarter 2021, Ride Performance segment was renamed Performance Solutions. Recast for a business line transfer from Powertrain to Performance Solutions. See page 14. 4 Global Manufacturing and Distribution Facilities 73,000 global team members

Manufacturing plants- 201

Distribution centers- 33

AMER EMEA APAC

Team members 30,500 28,500 14,000

Manufacturing plants 68 70 63

Distribution centers 15 15 3

Diversified profile – serving global and regional customers in all key markets

5 Customer and Platform Mix Tenneco - 2020 VA Revenue $12 billion

Top OE Platforms (Models)

General 7% VW MQB A/B (Golf and Sagitar passenger cars and Tiguan SUV) Motors 2% GM T1XX / K2XX LD (LD Silverado and Sierra trucks) 9.6% Volkswagen 2% GM C1XX (Traverse, XT5 and Enclave SUVs) Group 2% Ford T3/P558 HD (HD Super Duty truck) 8.0% 2% Daimler MFA (CLA and A-Class passenger cars, GLA SUV) Other 40.7% Ford Motor 2% Daimler MRA (E and C class passenger cars) 7.4% 2% GM T1XX / K2XX HD (HD Silverado and Sierra trucks) Top Customers 2% Ford T3/P552 LD (LD F-150 truck) VA Revenue Daimler AG 1% BMW LU (Clubman passenger car and X1 SUV)

6.1% 1% BMW LK/L7 (3 Series and 5 Series passenger cars)

FCA 1% GM Global Epsilon/E2XX (Malibu and Regal passenger cars and XT4 SUV)

4.8% 1% GM Global Delta/D2XX (Excell GT passenger car and Equinox SUV)

1% GEELY SPA (XC60 and XC90 SUVs) 3.3% First Auto Works 1% VW MQB A0 (Polo passenger car and T-Cross SUV) 1.7% 3.2% Cummins 1.7% 3.2% BMW 1% FCA DS HD (HD Ram DS truck ) 1.7% 1.8% 2.6% Geely Automobile 1.8% 2.4% SAIC Motor Caterpillar Renault/Nissan/ Toyota Motor Mitsubishi O’Reilly Auto Parts Advance Auto Parts

6 Balance Sheet and Liquidity As of March 31, 2021

Improved net leverage position Extended debt maturity profile

• Significant available liquidity of $2.1B* • New $800M senior secured notes due April at quarter end 2029, issued on March 17, 2021 ‒ Available revolving credit facility capacity of $1.5B; ‒ Proceeds used to redeem 2024 senior secured revolver undrawn at quarter end notes ‒ Offering was leverage neutral and extended • Net leverage improved 0.4x since year-end to our maturity profile 3.9x ‒ Pricing similar to notes replaced ‒ Q1 cash usage well below historical seasonal pattern See current debt maturity schedule and ‒ Structural Q1 margin expansion leverage ratios in appendix

Significant net leverage reduction and extended debt maturity profile

* Liquidity as of 3/31/2021 consists of available revolving credit facility capacity of $1.5B (and cash balances of $0.6B) 7 Driving Shareholder Value Creation Near and Long-Term Continuing performance momentum and accelerating value creation

Disciplined Performance Focus Capital Structure Optimization Long-term Sustainable Growth

• Execute Accelerate+ Program • Maintain strong liquidity position • Bolster core platforms to enable higher than market level growth − Structural Cost Reduction • Focus on free cash flow for debt service to unlock significant near-term value creation − Motorparts − $265M of run rate savings expected by end of 2021 (vs. 2019 baseline) potential − Performance Solutions • Lower Capital Intensity • Improving debt maturity profile − CTOHI − Mid-term annual capex targets of <= $500M • Prioritized capital allocation • Targeting long-term value-add revenue mix of − Continuing focus on working capital I. Organic growth/core competitiveness 80+% non OE light vehicle ICE efficiency II. Debt reduction − Clean Air & Powertrain cash engines funding core growth investments and debt reduction • Deploy Value Stream Simplification (VSS) III. Evaluate strategic acquisitions vs returns to across enterprise shareholders

Providing solutions for global mobility markets – today and tomorrow

8 Appendix

9 Commitment to Corporate Social Responsibility Driving Results 2019 Corporate Social Responsibility and Sustainability Report

Environmental Social Governance

2019 Performance Health and Safety Board and Leadership (as of September 2020) • Regular board and governance refreshment process • 90% of directors are independent 13% Lower Lost • 5 directors added since 2019 18.8% Reduction 11% Reduction in 8% Lower Day Case Rate in Energy Use Water Withdrawal Incident Rate • 30% of directors are female • 33% of our manufacturing sites are OHSAS • ~5 year average director tenure 18001 / ISO 45001 third party certified; Goal is 100% Ethical and Secure Practices • Code of Conduct and Supplier Code of Product Safety and Quality 2.6% Reduction 11.3% Reduction in GHG Conduct are compatible with the UN in Overall Waste Emission Intensity • 92% of locations certified to IATF 16949 Declaration of Human Rights and the UN vs. 2017 baseline and ISO 9001 Global Compact principles • 79% of global mfg. sites ISO 14001 certified Workforce Diversity • Comprehensive risk-based information • Product innovations driven by fuel security program based on industry best • 23% of US employees are ethnically diverse economy standards to reduce CO2 and practice frameworks for data security, such as criteria pollutant emissions • 24% of global team members are women NIST and ISO 27001 • 3% reduction targets set for energy, • 14.3% of leadership are women (VP & above) • Due diligence process to select vendors greenhouse gas emissions, water withdrawal, • 16,000 diversity partnerships through the sharing our values around human rights, and industrial waste for 2021 Local Job Network ethics and environmental responsibility

“As our company continues to evolve, true success can only be achieved by doing the right things the right way and constantly striving to make the communities where we work and live better – both environmentally and socially.” - Brian Kesseler, CEO

Motorparts and Powertrain business Groups 10 Appendix: Full Year 2020 Financial Results ($ millions) (millions, except percents and per share data) FY 2020 Free Cash Flow for debt service(2) FY 2020

Revenue $15,379 Cash from Operations $629 Proceeds from deferred purchase price of VA revenue 12,024 283 factored receivables(1) Adjusted EBITDA 1,045 Capital expenditures (394)

VA adjusted EBITDA margin 8.7% Payments to non-controlling interest partners (42)

Interest expense 277 Other investing / financing (16)

Adjusted tax expense 110 Free Cash Flow for debt service $460

Adjusted noncontrolling interest expense 63 Factored Receivables YE 2020 Adjusted net income (loss) (36) Balance of factored receivables at year end $956

Diluted shares outstanding 81.4 Decrease in factoring vs. 2019 $(81)

Adjusted EPS $(0.44) (2) Free Cash Flow for debt service represents cash flow from operations, plus the proceeds from deferred purchase price of factored receivables less the amount of cash payments for property, plant and equipment and (1) See Proceeds from deferred purchase price of factored receivables in the investing section of the payments to noncontrolling interest partners, as well as various other amounts. Free Cash Flow for debt service cash flow statement. GAAP requires reclassification of amount from Change in receivables in the is not a GAAP calculation and should not be considered as an alternative to operating cash flows as a measure Cash from operations section. of liquidity. Tenneco has presented Free Cash Flow for debt service because it regularly reviews Free Cash Flow for debt service as a measure of the company's performance and ability to reduce net debt. In addition, Tenneco believes its investors utilize and analyze the company's Free Cash Flow for debt service for similar purposes. However, the Free Cash Flow for debt service measure presented may not always be comparable to similarly titled measures reported by other companies due to differences in the components of the calculation.

11 2020 Adjusted Earnings Measures Reconciliation of GAAP to Non-GAAP Results

Net income (loss) Net income (loss) attributable to Income tax (expense) ($ millions, except per share amounts) attributable to Per Share EBIT EBITDA noncontrolling benefit Tenneco Inc interests

Earnings (Loss) Measures $ (1,521) $ (18.69) $ 61 $ (459) $ (724) $ (85)

Adjustments (1) Restructuring and related expenses 141 1.71 - (36) 177 169 Inventory write-down 54 0.67 - (19) 73 73 Asset impairments 396 4.87 7 (100) 503 503 Other costs (including strategic and transaction related) 31 0.39 - (7) 38 38 Antitrust reserve change in estimate (11) (0.14) - - (11) (11) Gain/loss on sale of assets (1) (0.02) - 1 (2) (2) Gain on extinguishment of debt (2) (0.03) - - (2) (2) OPEB curtailment (21) (0.26) - - (21) (21) Goodwill and intangible impairment charges 366 4.51 5 (12) 383 383 Noncontrolling interests adjustments 10 0.13 (10) - - - Net tax adjustments 522 6.42 - 522 - - Adjusted Net Income, EPS, NCI, Tax, EBIT and EBITDA (2) $ (36) $ (0.44) $ 63 $ (110) $ 414 $ 1,045

(1) Tenneco presents the reconciliation of GAAP to non-GAAP earnings measures primarily to reflect the results in a manner that allows a better understanding of the results of operational activities separate from the financial impact of decisions made for the long-term benefit of the company and other items impacting comparability between the periods. Adjustments similar to the ones reflected above have been recorded in earlier periods, and similar types of adjustments can reasonably be expected to be recorded in future periods. Using only the non-GAAP earnings measures to analyze earnings would have material limitations because its calculation is based on the subjective determinations of management regarding the nature and classification of events and circumstances that investors may find material. Management compensates for these limitations by utilizing both GAAP and non- GAAP earnings measures reflected above to understand and analyze the results of the business. The company believes investors find the non-GAAP information helpful in understanding the ongoing performance of operations separate from items that may have a disproportionate positive or negative impact on the company's financial results in any particular period. (2) Adjusted results are presented in order to reflect the results in a manner that allows a better understanding of operational activities separate from the financial impact of decisions made for the long term benefit of the company and other items impacting comparability between periods. Similar adjustments have been recorded in earlier periods and similar types of adjustments can reasonably be expected to be recorded in future periods. The company believes investors find the non-GAAP information helpful in understanding the ongoing performance of operations separate from items that may have a disproportionate positive or negative impact on the company’s financial results in any particular period.

12 2020 Revenue and Value-add Revenue Reconciliation of GAAP to Non-GAAP Results

Performance ($ millions) Clean Air Powertrain (4) Motorparts Total Tenneco Solutions(4) Net sales and operating revenues $ 6,721 $ 3,431 $ 2,725 $ 2,502 $ 15,379 Less: Substrate sales 3,355 - - - 3,355 Value-add revenues (1) $ 3,366 $ 3,431 $ 2,725 $ 2,502 $ 12,024

Adjusted EBITDA (2) $ 1,045 Adjusted EBITDA as % of value-add revenue (3) 8.7%

(1) Tenneco presents the reconciliation of revenues in order to reflect value-add revenues separately from substrate sales. Substrate sales include precious metals pricing, which may be volatile. Substrate sales occur when, at the direction of its OE customers, Tenneco purchases catalytic converters or components thereof from suppliers, uses them in its manufacturing processes and sells them as part of the completed system. While Tenneco original equipment customers assume the risk of this volatility, it impacts reported revenue. Excluding substrate sales removes this impact. Tenneco uses this information to analyze the trend in revenues before these factors. Tenneco believes investors find this information useful in understanding period to period comparisons in the company's revenues. (2) Adjusted results are presented in order to reflect the results in a manner that allows a better understanding of operational activities separate from the financial impact of decisions made for the long term benefit of the company and other items impacting comparability between periods. Similar adjustments have been recorded in earlier periods and similar types of adjustments can reasonably be expected to be recorded in future periods. The company believes investors find the non-GAAP information helpful in understanding the ongoing performance of operations separate from items that may have a disproportionate positive or negative impact on the company’s financial results in any particular period. (3) Tenneco presents the reconciliation in order to reflect EBITDA as a percent of value-add revenues. Presenting EBITDA as a percent of value-add revenue assists investors in evaluating the company's operational performance without the impact of substrate sales, which can be volatile. (4) Beginning in the first quarter 2021, Ride Performance segment was renamed Performance Solutions. Recast for a business line transfer from Powertrain to Performance Solutions. See page 14 13 Segment Recast Impact on 2020

($ millions)

2020 Segment Performance 2020 Segment Performance (a) Total revenue is equal to value add revenue for As Previously Reported Segment Change As Recast these segments. Adjusted Total Adjusted Total Adjusted Adjusted Total EBITDA Revenue EBITDA Revenue EBITDA EBITDA (b) See Tenneco’s earnings release dated May 6, 2021, Revenue (a) (b) (a) (b) (a) (b) Margin (b) for a description of why we present Adjusted EBITDA and Adjusted EBITDA margin. Refer to the Attachments Powertrain: to the earnings Press Release dated May 6, 2021, for Q1 $ 997 $ 90 $ (81) $ (22) $ 916 $ 68 7.4% U.S. GAAP reconciliations. Q2 $ 602 $ (21) $ (42) $ (7) $ 560 $ (28) -5.0% Q3 $ 1,007 $ 124 $ (79) $ (23) $ 928 $ 101 10.9% Q4 $ 1,120 $ 152 $ (93) $ (28) $ 1,027 $ 124 12.1% YTD 2020 $ 3,726 $ 345 $ (295) $ (80) $ 3,431 $ 265 7.7%

Performance Solutions: Q1 $ 588 $ 16 $ 81 $ 22 $ 669 $ 38 5.7% Q2 $ 336 $ (41) $ 42 $ 7 $ 378 $ (34) -9.0% Q3 $ 600 $ 32 $ 79 $ 23 $ 679 $ 55 8.1% Q4 $ 683 $ 29 $ 93 $ 28 $ 776 $ 57 7.3% YTD 2020 $ 2,207 $ 36 $ 295 $ 80 $ 2,502 $ 116 4.6%

Beginning with the first quarter of 2021, the Company changed the name of its Ride Performance segment to Performance Solutions. Relative to its predecessor name, management believes the new name better describes the broad offering of the segment’s products and solutions available to customers. The segment supplies mission critical products and applications to the automotive, commercial vehicle, aerospace, industrial, rail, two- wheel, and motorsports industries.

Beginning with the first quarter of 2021, the Company transferred a business line previously managed within the Powertrain segment to the Performance Solutions segment. Management determined that the business line’s products, applications, diversification and solutions competency aligned better with the long-term strategic goals and positioning of the Performance Solutions segment. As such, prior period operating segment results and related disclosures have been conformed to reflect the Company's current operating segments. There is no impact to the consolidated financial statements of the Company as a result of this change.

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