EXHIBIT 12 TENNECO AUTOMOTIVE INC. AND CONSOLIDATED SUBSIDIARIES COMBINED WITH 50% OWNED UNCONSOLIDATED SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (DOLLARS IN MILLIONS) (UNAUDITED) <Table> <Caption> NINE MONTHS ENDED SEPTEMBER 30, ------------- 2004 2003 ---- ----- Net income.................................................. $ 34 $ 29 Add: Interest expense.......................................... 104 103 Amortization of interest capitalized...................... 1 1 Portion of rentals representative of the interest factor................................................. 8 8 Income tax expense (benefit).............................. 11 (1) Minority interest......................................... 4 5 Undistributed (earnings) losses of affiliated companies in which less than a 50% voting interest is owned......... -- 3 ---- ---- Earnings as defined.................................... $162 $148 ==== ==== Interest expense............................................ $104 $103 Interest capitalized........................................ 1 3 Portion of rentals representative of the interest factor.... 8 8 ---- ---- Fixed charges as defined............................... $113 $114 ==== ==== Ratio of earnings to fixed charges.......................... 1.43 1.30 ==== ==== </Table>