EX-24
POWER OF ATTORNEY
AND
CONFIRMING STATEMENT

        KNOW ALL PERSONS BY THESE PRESENTS, that I hereby designate, appoint,
and constitute, and hereby confirm the designation, appointment and constitution
of, each of Ashley L. Bancroft, Maja Fabula, Kevin L. Freeman, Paul D. Novas and
Thomas J. Sabatino, Jr.  as my true and lawful attorney-in-fact and agent, with
full power of substitution, for me and in my name, place and stead, in any and
all capacities, to execute and file on my behalf all Forms 3, 4 and 5 (including
any amendments thereto) that I may be required to file with the U.S. Securities
and Exchange Commission (the "SEC") and any stock exchange as a result of my
direct or indirect ownership of, or transactions in, securities of Tenneco Inc.
or its subsidiary companies.  I hereby further grant unto each said
attorney-in-fact and agent all full power and authority to do and perform each
and every act and thing requisite and necessary to be done in and about the
premises, fully to all intents and purposes as I might or could do in person,
hereby ratifying and confirming all that each said attorney-in-fact and agent or
my substitute or substitutes may lawfully do or cause to be done by virtue of
the power and authority granted hereunder to each attorney-in-fact including,
without limitation, the full power and authority to apply for, change or
otherwise access any codes or other authorizations necessary to make the filings
with the SEC. The authority of Ashley L. Bancroft, Maja Fabula, Kevin L.
Freeman, Paul D. Novas and Thomas J. Sabatino, Jr. under this Power of Attorney
and Confirming Statement shall continue until I am no longer required to file
Forms 3, 4 and 5 with regard to my direct or indirect ownership of or
transactions in securities of Tenneco Inc. or its subsidiary companies.

        I hereby acknowledge Ashley L. Bancroft, Maja Fabula, Kevin L. Freeman,
Paul D. Novas and Thomas J. Sabatino, Jr. are not assuming any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934, as amended.


Date:    May 10, 2021

Signed:  /s/ Roy V. Armes