BMW Common ECU Failures

BMW ABS Pump ECU Module

1999 - 2004 BMW 5 Series, 6 Series, 7 Series, 8 Series, M Series, Z Series
This is a very common failing part, if you have had your wheel speed sensors changed and you are still getting the wheel sensor fault codes or you have a non communication fault then this ABS module is what you need.

BMW 1 series (E87) & 3 Series (E90, E91) ABS DSC/ACS Pump Fault

Very common fault causes the DSC / ASC lights to illuminate with fault code "5E20 - HYDRAULIC PRESSURE SENSOR INTERNAL"

BMW 3 Series Turbo Actuator problem

This is a common problem for all diesel 3 series BMW’s built between 2005 & 2010, the fault causes the engine to loose power intermittently.

BMW 316, 318 E46 ECU

Common problem causing engine misfire and non start faults, this type of ECU also suffers water damage...

BMW Bosch Motronic and BMW Siemens

engine management ECUs suffer water damage due to blocked heater inlet drain hose. This hose is suposed to drain any water in the fresh air inlet. Debri blocks this hose and allows water to build up eventually flooding the ECU compartment and causing ECU failure. The fix is easy - shorten hose by 2cm at bottom and clear drain pipe with thin wire as part of your BMW winter service.
"The BMW that came in for repair would run fine for a while

But then stop completely for a few minutes before restarting and carrying on as if nothing had ever happened. The trouble with this sort of fault is that all the tuning and diagnostics in the world can't find it unless the fault occurs while the test gear is hooked up to it. I think it was Volkswagen who started the widely held belief that linking the car to a computer will fix everything, it won't,and it can't find a fault that is reading within its correct limits, but fortunately the fault did happen to us while we had the test gear attached. The cause was a greatly reduced ignition spark energy level.

The fault was caused by the Ignition Control which unfortunately is part of the Injection Control Unit and not available seperately. The price of this was bad news and strongly reinforced the owner's decision to go Diesel on his next purchase. Luckily though the unit had not damaged any unavailable parts within it though so a reconditioned unit cured the problem"