ESP Light always on - ABS pump / control unit issue?

For the 01435 code, if it's 2001 facelift, check if the brake sensors are on the master cylinder, if so no ABS unit needed just change the sensors, it will be the one nearest the bulk head under the res, but would change both whilst in there, the signal will be low due to falling sensors

from ecutesting.com website, i have not tried the yet,i have intemitant fault on wifeys POS fiesta
even indies want the best part of 800 to replace abs ecu.


Audi ABS pump & ECU Modulator/Module
A4, A6, A8, Avant, Quattro Etc 1996 - 2000

ABS system: Bosch 5.3
ABS pump location: Under bonnet on the near side next to the washer bottle.


The Audi ABS pump & module sytem has been a very common failure for a long time now, the problem usually starts with the ABS light coming on intermittently but then the problem becomes more constant. We are rebuilding customers own units and supplying direct replacements from stock, we are now selling Bosch 5.3 ABS pumps to Audi main dealers within the UK & throughout Europe. If you would like to send your ABS unit in to us to be tested and rebuilt then please fill in this test form or you can browse our catalogue to select the ABS unit you require.



ABS pump module removal:
We normally only ever need the electronic part of the ABS pump, this is atatched to the side of the pump with six torx screws and can be removed easily. The best way to access the module is to first remove the passenger side front wheel and the inner wheel arch plastic liner, then the washer bottle can be unbolted and moved out of the way giving access to the six torx screws. Remember you can still drive the car with the module removed - you will have conventional braking but with no ABS function and the light will remain on untill the remanufactured module is refitted.