EXHIBIT 15.1

August 7, 2018

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We are aware that our report dated August 7, 2018 on our review of interim financial information of Tenneco Inc., which appears in this Quarterly Report on Form 10-Q, is incorporated by reference in the Registration Statements on Form S-8 (Nos.333-17485, 333-41535, 333-33934, 333-101973, 333-113705, 333-142475, 333-159358 and 333-192928) and the Registration Statement on Form S-3 (No. 333-224786) of Tenneco Inc.

Very truly yours,

/s/PricewaterhouseCoopers LLP

Milwaukee, Wisconsin