MoFoCo Enterprises Inc. 4170 N Lydell Ave Milwaukee, WI 53212 Phone: 414‑963‑1020
Store & Phone Hours: Monday‑Friday 9:00AM - 3:00PM Saturday CLOSED Sunday CLOSED
TESTED - 06/01/04
BEEN IN WAREHOUSE STORAGE FOR 20+ YEARS
APPEARS STRUCTURALLY AND MECHANICALLY SOUND
INTERCHANGE NUMBERS:
037906022AG
037906022AR
037906022CH
037906022CS
037906022DF
037906022FH
037997022MX
This ECU should fit many Golf/Jetta models. As always your best bet is to match the part numbers with the original unit in your car. These are located in the cowl (where the wipers sprout out of), on the passenger side of the car, under the metal bracket.
A faulty ECU is one of the most common no start, start-stall, or random stalling problems with these cars. These can also cause issues with erroneous check engine lights, idle control problems as well as emission control & cold or hot start problems. I have also seen fuel pump relay turn on faults (ECU won't turn on the fuel pump), as well as an condition where the high speed injector driver has failed. This causes the car to sit and idle fine, but it won't accelerate. It is often recommended to keep an extra ECU in the trunk. These units now have to be special ordered from most dealers new for big $ (often times over $1000!), and you can never find one when you need one. Even now finding a good one second hand is getting to be quite difficult as these cars get older.
WYSIWYG