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-   -   91 e34 obc ignition lock out? Reset? (

civic_eater 01-23-2013 01:02 PM

91 e34 obc ignition lock out? Reset?
So my friend just bought his first bmw a 91 e34. Car ran great and it had an ignition lock code set on the obc that was 0000. My buddy being a noob changed the code and then forgot it..... How do i reset this security system?now the car wont start without the right code

bmwm5lover 01-23-2013 03:16 PM

no clue....did you try to disconnect the battery overnight? will that even help?

MANDD 01-23-2013 03:44 PM

The 91 E34 uses OBC 4. To deactivate this in the event the code is forgotten do the following;

1. Disconnect and then reconnect the battery

2. Turn ignition to position 1 only. (the horn may/will sound)

3. The OBC will now display a time of 15:00 minutes, this will now count down.

4. After the 15:00 minutes has elapsed the car may be started.


civic_eater 01-23-2013 07:33 PM

Will it do that everytime or can i reset the code?

TSI 01-23-2013 08:30 PM

You can reset the code. Once you start the engine the code is erased.

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