EXHIBIT 15.1

November 7, 2011

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Commissioners:

We are aware that our report dated November 7, 2011 on our review of interim financial information of Tenneco Inc. for the periods ended September 30, 2011 and 2010 and included in the Company’s quarterly report on Form 10-Q for the quarter ended September 30, 2011 is incorporated by reference in Registration Statement Nos. 333-17485, 333-30933, 333-17487, 333-41535, 333-27279, 333-23249, 333-27281, 333-41537, 333-48777, 333-76261, 333-33442, 333-33934, 333-58056, 333-101973, 333-113705, 333-142475, 333-142473 and 333-159358 on Form S-8 and Registration Statement Nos. 333-24291 and 333-159305 on Form S-3.

Very truly yours,

/s/PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Chicago, Illinois