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Why won't my BMW doors unlock?

Updated: 10/21/2022
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7y ago

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Fuses were the problem for me. 2006 BMW 325I. Went with 20A. THANKS!

Check your fuses first. This just happened to me as well. I changed fuse #56 and #57, they are both 15amps. One was blown, replaced it and all my door locks are working again with the remote and manually inside the car. Your gas cap may be locked as well so be aware that you should get this fixed for safety and convenience reasons. The manual gas cap pop on my car was buried in the right side wall of the trunk.

Thanks for your help. That fix also works for 2006 325I. The same #56 & #57 fuse, on the bottom left.

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Ok, that may work temporarily on the E90/E91, 2006+ 3-series because BMW royally screwed up on the door lock actuators. If you replace them with the same rating fuse it will pop again. The fix can be found in BMW service bulletin SI B51 19 07. Well it's not really a fix. It basically says to replace the 15A fuse with 20A and then operate the locks looking for problems with the operation of the actuators. If there is a problem replace the actuator in pairs! Both fronts or both rears together.

Now if the door locks are not working on an E46 3-series 1999-2005 then the problem and solution is different. Since the original question was why won't the doors UNLOCK then the person probably has an E46 and not an E90/E91 since on the E90/E91 the locks usually fail both locking and unlocking. Ok, so in the E46 the problem is usually the actuator or the GM5 (ZKE5) module, more specifically the door lock relays in the GM5 module. E46's have problems with both about equally. If only the driver's door fails to unlock then it could be either, actuator or GM5. If both doors fail on a 2-door or if 3 or 4 doors fail on a 4-door then the problem is the GM5. There are other things to look for which I will not discuss here. The actuator is about $120 plus installation each and the GM5 is about $700 when replaced with a brand new unit installed and coded by a dealer. Luckily the GM5 can be repaired for less than $100.

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