Mazda Millenia Engine Computer Up for sale is a Working, in excellent condition Mazda Millenia ECU. This unit came out of a recently crashdamaged 1997 Millenia with the 2.5 liter V6 engine. Fits many 1997-1998 model year cars. See part numbers at the top of the listing. This unit offers a 30 day functionality warranty. KLL5 18 881B / KLL518881B / ECM ENGINEAs always with this type of component your best bet is to match the part number to the one on your original ECU.