VW ECU Up for sale is a Working, in excellent condition Vw Golf/Jetta ECU. This ECU came out of a 2001 1.8T Passat, May possibly work with other years/models as well, this is the buyers responsibility to find out. As always your best bet is to match the part number off your original unit with this one.4B0 906 018 BQ / 4B0906018BQ ENGINE / 0261206884 / 0 261 206 884A faulty ECU is one of the most common no start 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.If your car does not have these issues but you intend to keep it a while, I recommend our customers 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. This is located in the cowell of your VW - Where the wipers sprout out from. Unit comes with a 30 day warranty, replacement or refund if returned in original condition. LARGER PICTURE