Exhibit 12.1 FEDERAL-MOGUL CORPORATION COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (unaudited) (In thousands except for ratios) Three months ended Year ended December 31, March 31, ------------------------------------------------------- 1999 1998 1997 1996 1995 1994 ------------ ---- ---- ---- ---- ---- Fixed charges: Interest expense $ 68,711 $193,607 $ 32,000 $ 42,600 $37,300 $ 21,200 Estimated interest portion of rents 1,937 15,768 9,700 11,267 11,333 8,300 Amortization of debt issuance expense 2,189 10,393 1,288 1,827 1,803 1,053 -------- -------- -------- --------- ------- -------- Total fixed charges $ 72,837 $219,768 $ 42,988 $ 55,694 $50,436 $ 30,553 Earnings: Earnings before fixed charges $106,600 $185,500 $ 99,500 $(228,700) $(3,300) $102,100 Fixed charges 72,837 219,768 42,988 55,694 50,436 30,553 -------- -------- -------- --------- ------- -------- Adjusted earnings $179,347 $405,268 $142,488 $(173,006) $47,136 $132,653 Ratio of Earnings to Fixed Charges 2.464 1.844 3.315 (3.106) 0.935 4.342 ======== ======== ======== ========= ======= ========