Please find enclosed the Annual Report for FY2025-26.

TENNECO CLEAN AIR INDIA LIMITED (formerly known as Tenneco Clean Air India Private Limited) CIN: L29308TN2018FLC126510 Telephone: +2135 612501/506 Email: Tennecoindiainfo@tenneco.com Website: www.tennecoindia.com Date: August 6, 2026 To To National Stock Exchange of India Limited BSE Limited Exchange Plaza, C-1, Block G Phiroze Jeejeebhoy Towers Bandra Kurla Complex, Dalal Street, Bandra (E), Mumbai – 400051 Mumbai – 400001 Scrip Symbol: TENNIND Scrip Code: 544612 Subject: Integrated Annual Report for the financial year ended March 31, 2026 Dear Sir/Madam, This is with reference to our intimation letter dated August 3, 2026 about the 8th Annual General Meeting (“AGM”) of the Company which is scheduled to be held on Friday, August 28, 2026 through Video Conferencing/Other Audio Visual Means, in accordance, with the relevant circulars issued by Ministry of Corporate Affairs and Securities and Exchange Board of India (SEBI). In terms of the requirements of Regulation 34(1) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we are submitting herewith the Annual Report of the Company including the Notice of 8th AGM for the financial year 2025-26, which is being sent through electronic mode to the Members. The same is also available on the website of the company at https://tennecoindia.com/investor- relations/annual-reports/. You are requested to kindly take the same on record. Sincerely, For Tenneco Clean Air India Limited Roopali Singh Company Secretary and Compliance Officer Membership No: A15006 Place: Gurugram Encl: as above Registered Office: RNS2, Nissan Supplier Park, SIPCOT Industrial Park Oragadam Industrial Corridor, Sriperumbudur, Taluk, Kancheepuram, Tamil Nadu, India, 602105 Integrated Annual Report 2025-26 NO BOUNDARIES YOUR GUIDE TO THE REPORT WELCOME TO TENNECO CLEAN AIR INDIA LIMITED ABOUT THE REPORT Tenneco Clean Air India Limited is an ultimate subsidiary of Tenneco LLC, This Integrated Annual Report presents the financial and non-financial the principal operating entity of the Tenneco Group, a U.S.-headquartered performance of Tenneco Clean Air India Limited for the financial year global Tier I automotive supplier. The Company operates in the automotive ended March 31, 2026. components sector with a focus on clean air, powertrain and advanced ride It provides an integrated view of the Company’s strategy, governance, performance and outlook, reflecting its approach to technology solutions. sustainable value creation. In this report, the terms “Tenneco Clean Air India Limited,” “Tenneco Clean REPORTING PERIOD AND BOUNDARY Air India,” “the Company,” “we,” “our,” “us,” and “it” refer to Tenneco Clean Unlike the central theme, ‘No Boundaries’, this Integrated Annual Report is presented within defined reporting boundaries. Air India Limited. Period covered: April 01, 2025 to March 31, 2026 (Where necessary, past and recent information are also included). Organizations covered: Tenneco Clean Air India Limited and wherever required, its subsidiaries. Unless otherwise specifically stated, all disclosures and information presented in this Integrated Annual Report pertains to the Company on a standalone basis. OUR REPORTING SUITE Integrated Report Non-financial Information Statutory and Financial Information Corporate Overview Director’s Report & its Annexures Report on Corporate Governance Sustainability Information FIND WHAT MATTERS MOST Business Responsibility & Other Disclosures Sustainablity Report Financial Statements Notice of AGM Corporate Overview Statutory Reports Financial Statements 03-61 62-208 209-355 Scan the QR code to know more about Tenneco Clean Air Foreword 04 Management Discussion and Analysis 62 Standalone Financial Statements 210 Leadership Reflection 06 Directors’ Report 85 Consolidated Financial Statements 276 CFO’S Review 10 Business Responsibility & Our reporting suite has been prepared in accordance with applicable FORWARD-LOOKING STATEMENTS No Boundaries 12 Sustainability Report laws, regulations and standards in India, as well as select globally This Integrated Annual Report contains forward-looking statements The Tenneco Way 14 Report on Corporate Governance 171 Notice recognised frameworks and guidelines, as outlined below: based on Company’s current assumptions and expectations. These About the Company 16 statements are subject to risks and uncertainties, including but not Awards and Accolades 18 356-371 The Companies Act, 2013 and rules notified thereunder limited to, changes in economic conditions, regulatory developments IPO Highlights 19 Indian Accounting Standards and other external factors, which may cause actual outcomes to Business Segments 20 The Evolving Automotive Landscape 22 The Secretarial Standards differ materially. Readers are advised to exercise caution in relying on such statements. The Company undertakes no obligation to Value Creation Model 26 The Securities and Exchange Board of India (Listing Obligations update them, except as required by law. Manufactured Capital 28 and Disclosure Requirements) Regulations, 2015 Intellectual Capital 34 Natural Capital 38 Business Responsibility and Sustainability Reporting (BRSR) FEEDBACK Financial Capital 42 based on the National Guidelines for Responsible Business We welcome stakeholder feedback to enhance the quality and Human Capital 44 To view the report online Conduct (NGRBC) relevance of our disclosures. Social and Relationship Capital 48 www.tennecoindia.com Stakeholder Engagement and Materiality Investor-relations | Annual-reports International Integrated Reporting Council (IIRC) Frameworks Email Assessment (Now part of IFRS) General query: tennecoindiainfo@tenneco.com Board of Directors 58 Indian investors query: tennecoindiainvestors@tenneco.com Executive Leadership Team 60 United Nations Sustainable Development Goals Principles (UN SDGs) Note: Certain visuals and images in this report are used for United Nations Global Compact (UNGC) Principles representation purposes only. 03-61 62-208 210-355 04 Tenneco Clean Air India Limited Tenneco Clean Air India Limited 05 Corporate Overview Statutory Reports Financial Statements Integrated Annual Report 2025-26 Integrated Annual Report 2025-26 FOREWORD 2025 was a defining year for Tenneco Clean Air India, made Tenneco Group is one of the world’s leading designers, manufacturers and distributors of automotive components and systems, serving original equipment and aftermarket customers across major global markets. Headquartered in Northville, Michigan, Tenneco possible by our people, our disciplined execution and our customer Group operates 169 manufacturing sites and 39 engineering and technical facilities across 28 countries, supported by a global team of approximately 60,000 people. focus that defines ‘The Tenneco Way’. That culture — reflected Tenneco Group’s portfolio spans four business divisions — Performance Solutions, Powertrain, Clean Air and DRiV — and includes iconic in how our teams operate, lead, and deliver — helped drive the brands such as Monroe®, Walker®, Champion® and Fel-Pro®, among more than 40 brands. Through “The Tenneco Way”, the Tenneco successful public listing of Tenneco Clean Air India Limited, an Group brings an execution-led culture, high-performance mindset and strong people accountability to every market it serves. important milestone in Tenneco Group’s broader growth story. In India, this global scale is reflected through Tenneco Clean Air India Limited and its subsidiaries, serving Indian OEMs and export markets with technologies tailored to local customer needs. With 12 manufacturing facilities and 2 R&D centers near key automotive hubs, Tenneco India combines global engineering capability with local manufacturing strength, market understanding and customer relationships. Learn more at www.tennecoindia.com www.tenneco.com We thank our customers and investors for their confidence and our colleagues across Tenneco Group for their continued [Showing first 8,000 characters — download PDF for full document]