Reporting Period: January 1, 2020 to December 31, 2020

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Tenneco Inc. | 2020 Sustainability Report

Contents

2020 Highlights

Our Sustainability Journey

Our Company

Our Planet

Our People

Our Governance

Our Products

SASB/GRI Index

Contents

02 About This Report

03 From the CEO

04 2020 Highlights

05 Our Sustainability Journey

07 Our Company

08 Tenneco Overview

09 Tenneco Values

10 2020 Awards and Honors

11 Responding to COVID-19

12 Our Planet

13 Energy and Greenhouse

Gas Emissions

14 Operational Waste and Water

15 Our People

16 Occupational Health and Safety

17 Talent Attraction and Retention

19 Inclusion, Diversity, and Equity

20 Labor Relations

21 Community Involvement

22 Our Governance

23 Corporate Governance

24 Ethics and Compliance

26 Cybersecurity and Data Privacy

27 Responsible Sourcing

28 Supplier Diversity

29 Conflict Minerals

30 Supply Chain Management

31 Our Products

32 Product Safety and Quality

33 Product Efficiency

35 Product Innovation

37 Appendix

A Additional Performance Data

B SASB/GRI Index

C Stakeholder Engagement

D Materiality Assessment

About This Report

We have prepared this report in accordance with the Global Reporting Initiative (GRI) Standards core option and cover metrics within the Sustainability Accounting Standards Board (SASB) Auto Parts Industry Standards. This third annual Sustainability Report incorporates our newly defined material topics and strategy framework, updated since our last report published in September 2020. The report covers our performance from January 1 to December 31, 2020, unless otherwise stated. We welcome feedback at Sustainability@tenneco.com.

We do not currently seek third-party assurance of report data; an Internal Audit Department (IAD) advisory assessment was conducted to review the sustainability report data for our SASB metrics to assess the business unit and corporate processes and determine if the controls operate at a level of precision sufficient to identify material errors or omissions.

The global COVID-19 pandemic significantly affected our operations at Tenneco during 2020. We enabled a portion of employees to work from home, and we paused production at various facilities throughout the year. Because of these impacts, our 2020 performance metrics do not reflect normal operations.

This report includes forward-looking statements. Please refer to our Annual Report on Form10-K and subsequent quarterly reports on Form10-Q and other filings with the U.S. Securities and Exchange Commission (SEC) for information regarding the risks and uncertainties that could cause our results to differ materially.

Suggested Links 2020 10-K

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"Sustainability is an integral part of our strategy and operations. We consider it part of holistic operating excellence and our corporate value to Make Tomorrow Better."

Tenneco Inc. | 2020 Sustainability Report

Contents

2020 Highlights

Our Sustainability Journey

Our Company

Our Planet

Our People

Our Governance

Our Products

SASB/GRI Index

From the CEO

Welcome to Tenneco's 2020 Corporate Sustainability Report, where we would like to share the major progress and increased achievements that show how we, even in these continued challenging times, are Making Tomorrow Better.

Because of the COVID-19 pandemic, 2020 was a difficult year for almost everyone. Despite all the challenges we faced, Tenneco remained steadfast in our commitment to the safety of our global team members, while continuing to improve our ability to operate our business in a sustainable, responsible manner.

The COVID-19 pandemic not only changed the way we do business, but severely impacted our team members, customers, stakeholders and the communities around us. To support those

affected, our team members across the globe engaged in many different activities - from decorating holiday trees and placing them outside a hospital to cheer first responders, to partnering with local agencies to distribute food baskets to families, to even supporting our customers who shifted manufacturing to make ventilators and masks with critical components - Team Tenneco mobilized to help in many ways. Internally, we launched the Healthy Team, Healthy Tenneco initiative to promote healthy practices to encourage not only sound physical health, but also the mental well-being of our team members. Even now in August 2021, as we are slowly adjusting to a new normal, we are doing everything possible to continue our established COVID safety protocols to ensure that our team members return home at the end of the day healthy and safe.

Beyond COVID, we saw a 19% reduction in our Incident Rate in one year, proving that our increased safety programs and measures are taking hold.

Over the last few years, the call for urgent action with regard to climate change has grown louder. Tenneco is committed to help protect our environment by working continuously to reduce the use of energy and other natural resources in our operations worldwide. In 2020, we reported a 4.8% reduction in energy intensity, and a 2.9% reduction in greenhouse gas emissions intensity versus 2019. As part of this commitment, in 2020, we completed a materiality assessment to identify our most important sustainability topics and prioritized these issues based on internal and external stakeholder input; developed a framework to align our strategic approach to sustainability and focus our efforts on our key impacts; and established new goals that will drive our performance.

Inclusion and diversity continues to be a key priority for Tenneco. Our customers recognize us for our progress to maintain a diverse supply base, yet we know we can, and should, do more - particularly in light of the social justice initiatives we witnessed throughout the year. In 2020, we established Tenneco's IDEA Board (Inclusion, Diversity, Equity and Action) to develop and assist the company's efforts to engrain the values of inclusion, diversity and equity into the fabric of our culture. In this report, I am proud to share the progress we have made in a short amount of time, ranging from hiring a new vice president to lead this important initiative, to celebrating diversity throughout Tenneco, to creating a new set of diversity goals that we look to achieve by 2030.

Good governance, risk management and managing our business impact remain top priorities as

well because we know it is the right thing for our company and our strategy. We have restructured the executive leadership team with additional roles and responsibilities specifically to address this focus, and we look forward to continuing to grow in this area.

In summary, Sustainability is an integral part of our strategy and operations. We consider it part of holistic operating excellence and our corporate value to Make Tomorrow Better. We are proud that many of our products contribute to reduced emissions and that we are providing solutions for global mobility markets

  • today and tomorrow. And, we've been recognized for our progress in the past and are excited about the results that will be delivered with the increased focus and resources we are dedicating, ranging from

inclusion and diversity to CO2 emissions reduction.

I would like to thank each of our global team members, whose dedication-even during the most trying times-drive the continued success of the company. We emerged from 2020 a stronger Tenneco, and this is in no small part due to our teams' efforts and ability to adapt, collaborate and innovate.

Thank you for taking the time to read Tenneco's sustainability story.

Brian Kesseler

Tenneco CEO

3

Tenneco Inc. | 2020 Sustainability Report

Contents

2020 Highlights

Our Sustainability Journey

Our Company

Our Planet

Our People

Our Governance

Our Products

SASB/GRI Index

2020 Highlights

As we continue to advance our sustainability efforts and measure our improvement, we are proud to report our 2020 accomplishments and share our progress with our stakeholders. Our 2020 performance highlights include:

We conducted a formal materiality assessment, developed a strategy framework, established an ESG council and set new goals to enhance sustainability at Tenneco (see page 6).

Through our efficient response to the COVID-19 pandemic, we launched our Healthy Team, Healthy Tenneco program to foster healthy practices related to both physical and mental well-being.

Our annual survey reflected significant increases in team member engagement and appreciation of communication from leadership.

We launched our IDEA Board to promote inclusivity in our culture, engage in thoughtful dialogue, and lead our strategy to attract and support diverse talent.

Our People

Our Planet

Our Products

Our Governance

19.4%

4.8%

30+

10

reduction in incident rate

reduction in energy intensity2

world-leading brands

Board members5

16%

2.9%

15

9

of U.S. team members

reduction in greenhouse gas emissions

brands are 100+ years old

independent directors

1

intensity (Scope 1 and 2)2

5

are ethnically diverse

and 1 independent chairperson

23%

3.7%

41%

30%

of team members are women

reduction in waste intensity2,3

of revenue from products that contribute to

of Board members

fuel efficiency and/or emission reduction4

are women5

48%

81%

97%

10%

Manufacturing sites certified to ISO 45001

Manufacturing sites certified to ISO 14001

Manufacturing sites certified to

of Board members are

Health & Safety Management System

Environmental Management System

IATF 16949 Quality Management

ethnically diverse1,5

System

1 Native Hawaiian or Other Pacific Islander/Asian/Hispanic or Latino/American Indian or Alaska Native/Black or African American/two or more races.

  1. Intensity normalized by total revenue.
  2. Performance Solutions and Clean Air business units only.

4 This reflects Clean Air and Powertrain segments only.

5 As of 12/31/2020.

4

• Occupational Health & Safety
• Inclusion, Diversity and Equity
• Labor Relations
• Talent Attraction and Retention
Conducting our business in a manner that prioritizes a best-in-class workforce, supports local
communities, and fosters long- term business success.
People
We also developed a framework to align our strategic approach to sustainability and to focus our efforts on our key impacts. Based on Tenneco's ESG priorities, we organized the pillars to define
our future performance and recognize opportunities for improvement across our business. Our strategy, The Road to Making Tomorrow Better, reflects stakeholder input, our material topics and critical elements of our culture. We continue to operate with a foundation of responsibility
and accountability as we implement our strategy to generate positive impacts related to People, Planet and Products.
Strategy Framework: The Road to Making Tomorrow Better

Tenneco Inc. | 2020 Sustainability Report

Contents

2020 Highlights

Our Sustainability Journey

Our Company

Our Planet

Our People

Our Governance

Our Products

SASB/GRI Index

Our Sustainability Journey

Stakeholder Engagement

We value regular communication with our stakeholders, including team members, customers, investors, communities, suppliers, government and regulatory agencies and trade associations. These dialogues help maintain positive relationships with stakeholders and provide essential input into our sustainability reporting process. In 2019, we conducted a cross-functional survey and a workshop to assess how we engage our stakeholders. See Appendix Cfor a summary of our engagement activities with key stakeholders, including the frequency of our engagements and relevant topics.

Materiality Assessment

In 2020, we engaged a third party to perform a materiality assessment to identify our most important ESG topics and prioritize these issues based on internal and external stakeholder input. For our materiality assessment, we used the Global Reporting Initiative (GRI) definition of materiality, which includes topics that reflect the reporting organization's significant economic, environmental and social impacts, or substantively influence the assessments and decisions of stakeholders. As part of this process we:

  • Conducted industry research and peer benchmarking to define the relevant issues;
  • Interviewed internal and external stakeholders and performed desktop research to understand topics of significance;
  • Prioritized our topics based on the importance to Tenneco and to external stakeholders; and
  • Refined the results through a validation workshop with Tenneco leaders.

The results of the assessment are shown in Appendix Din alphabetical order.

Planet

Minimizing our impact on

the planet through operational eco-efficiency and renewable

energy sources.

• Energy Use

• GHG Emissions

• Operational Waste

Products

our products.

Positively contributing to the

environment and society through

• Product Safety

• Product

& Quality

Innovation

• Product

Efficiency

5

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Disclaimer

Tenneco Inc. published this content on 08 September 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 15 September 2021 15:21:00 UTC.