Putthe key in the ignition and turn the key to the position where the warning lights show, but it does not attempt to start the engine. Leave on for a few seconds then switch off. Repeat this 5 times and on the last time, press the lock and unlock buttons on the fob before switching off. Try to start the car.
Thisis how to remove your ECU in the Audi a4's B5's.
AudiA6 C5 1.8 125HP 1995-1997; Audi A4 B5 1.8 125HP 1994-1999; Volkswagen Passat B5 1.8 125HP 1996-1999; ECU numbers. 0 261 204 957 / 8D0 907 558 T (Audi A4 B5 1.8 125HP 1998) 0 261 204 956 / 8D0 907 558 S (Volkswagen Passat 1.8 B5 125HP 1997) 0 261 204 774 / 8D0 907 558 B (Audi A4 B5 1.8 125HP 1996)
A4(B7 Platform) Discussion - Immobilizer Problems? - I went to start the car yesterday morning and it died almost immediately after starting up. I tried a couple more times with the same result - runs for a second and then dies. I know this to be a symptom of the immobilizer not recognizing the key, as one of my

Iwas able to read my immo (Audi A4 B5 ECU 8D0906018E) using Argdub's EEPROM reader. Problem is I can't seem to identify the PIN/SKC from the .bin file. The relevant lines contain FF FF and nothing else. Kindly advise if I'm doing something wrong and assist with extracting the PIN/SKC from the attached file. Many thanks.

EXAMPLE Bit 32 is b5 and Bit 33 is 15. Since the format is to put bit 33 before bit 32 we end up with 15b5. Convert that to decimal and we get 5557. Ad a zero in front and our SKC is 05557. Audi A4/S4 (MY2005 and up) IMMO generation IV; Audi A6/S6 (MY2005 and up) IMMO generation IV; Audi A3 (MY2006 and up) IMMO generation IV;
Waitfor ten seconds and press the unlock button again. Your Audi doors should open, and your second key should be programmed. Once you program all the keys, remove the key from the ignition to exit program mode and test the key fobs. Hint: If you have a third key, repeat steps 7 through 9. Step 8: Press the unlock button thrice if you
EQB7o.
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    • audi a4 b5 immobilizer reset