tbonetyler789

Hello I have a 99.5 A4 1.8t, I have been looking for a day and still can't find the ECU and fuel pump Relays, I was first under the impression that they were in ecu box but on mine there is nothing there, as you can see in the picture without the arrow. If anyone has any idea of where these can be located please chime in!

600whpA4

They can also be located under the dash behind the driverside leg bolster(basically near the clutch pedal).

nat1971a

I too would love to know the answer to this. In my research so far the fuel pump relay is 372. It is behind the panel below the steering wheel.
Is there a separate relay if you have a stock immobiliser and ECU?

Summmary of relays are
53 - horn
213 - load reduction
267 - electronic clutch

Is there a 219(109 in VW) relay perhaps? When i bought my car which isnt running...all the relays were pulled out. I suspect one is missing. Any help would be greatly appreciated

nat1971a

My car is also a 1999 audi a4 B5 1.8T with immobilser

aadhar

In my research so far the fuel pump relay is 372. It is behind the panel below the steering wheel.
Is there a separate relay if you have a stock immobiliser and ECU?

Summmary of relays are
53 - horn
213 - load reduction
267 - electronic clutch

livno70

Hello I have audi A4 2.8 1998 Can someone tell me where can I find an ECU relay . If enyone has any idea of where these can be located and what number is on the relay

vander

I have the 1.8T model, and mine is located as shown by the white arrow in the picture of the guy who posted the 1st post in this thread.
You have to remove the plastic covers just below the window, almost under the diver side (right hand drive) wiper, close to the brake-booster.
Its relay #30

audidub1234

i ****ed around with the coolant temp sensor and used a power probe to the wire and put power to it and now i got like 10 codes i think i ****ed up the ecu is that relay or imobilizer there to stop it from burning out the ecu

russellp73

1. I know it's been a long time, but this may help others that are just diving into a newer car. This is my newest audi (03 a4 1.8 t). Referring to the pic without the arrow, if you don't see any relays up top, they are 3 layers deep in that box. Take out the ecm. No need to disconnect. Take out the tcm under that. No need to disconnect. Now you can see the Sai and ecm relay. They are 373 and 219 respectively.

Audi B7

The relay is under the actual ECU