Question about BMW Z3

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I have a 99 bmw z3 at my shop. even with the ignition key out of the car all of the accesories still work, windows , wipers, odometer stays lit and air bag light on. drains battery completely within 2 days, seems like igntion is always in accessory position with key off and out of vehicle.

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  • bernie98nc Aug 27, 2010

    ignition relay or switch? for the liitle bit of time i did look at it today i researched all data and never found a relay for the ignition?



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Time to change the ignition relay.
it sounds like it has failed in the closed position.


Posted on Aug 27, 2010

  • blueextc3221
    blueextc3221 Aug 27, 2010

    1. Disconnect the negative battery cable. Remove the steering wheel.

    2. Remove the trim panel on the lower left side.

    3. Remove the steering column casing lower section.

    4. Press in the retaining hooks on both sides and remove the switch.

    To install:

    1. Press the switch in position until the retaining hooks engage it in place. Make sure that the ignition switch is correctly positioned with respect to the steering wheel lock.

    2. Attach all electrical connectors and install the plug.

    3. The remaining components are installed in the reverse order from which they were removed.

    4. Install the steering wheel and connect the negative battery cable.

    E30 Models

    1. Disconnect the negative battery terminal. Disarm the SRS when working on the steering column, if equipped.

    2. Remove the steering wheel, the trim panel below the steering column and the steering column lower casing.

    3. Disconnect the ignition switch harness and press the clips in securing the switch. Pull the switch off the lock assembly.

    4. Check the position of the switch and install in reverse order.

    E36 Models

    1. Turn the ignition switch to the OFF position.

    2. Disconnect the negative battery terminal to disarm the SRS when working on the steering column, if equipped.

    3. Remove the lower dash panel mounting screws and then pull outward on the left side of the panel to release and remove the panel downward.

    4. Remove the lower steering column cover mounting screws, then remove the cover.

    5. Wearing eye protection, clean away the paint covering the ignition switch set screws. The screws are very small and the paint acts as a locking agent and must be thoroughly removed.

    6. Using a small flat blade screwdriver, loosen the screws about 4-5 turns and slide the switch away from the steering lock cylinder, then detach the electrical connector.

    To install:

    1. Slide the lock cylinder in place, but do not force it. If the cylinder does not seat, turn the ignition lock cylinder slowly with the ignition key until the switch seats. Test the switch operation before locking in place.

    2. Tighten the set screws until they seat snuggly, be careful to not overtighten.

    3. Apply touch up paint over the screw heads as a mild locking agent.

    4. The balance of assembly is in reverse order of removal.

  • blueextc3221
    blueextc3221 Aug 27, 2010

    the relay is onboard the BCM - and not seperately serviceable.

    I have given you the procedure to change the cylinder.

    It may be faulty if the owner's keychain is overloaded.




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