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Thread: Trunk Release Switch no longer works

  1. #1
    Join Date
    Jan 2011
    Location
    Charlotte, NC
    Posts
    89

    Trunk Release Switch no longer works

    The trunk release switch that is located on the trunk has quit working. I can still open the trunk from the key fob as well as the trunk release button under the dash. I searched for any common failure points (switch, wiring, etc.) but couldn't really find anything, but perhaps I just missed it.

    So is there a common mode of failure for this area, or do I just need to go in and start tracing wires?

  2. #2
    Join Date
    Jan 1970
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    32.8 N, 117.3 W
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    7,618
    it's probably the actuator, just my guess

  3. #3
    Join Date
    Jun 2011
    Location
    Redondo Beach, CA
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    1,940
    If it works from the key fob and the glove box it must either be the switch on the trunk or for some reason it thinks the passenger door is still locked. Not sure how to test the second but I'd try cycling through lock-unlock from the key a few times and see if that clears it up.

    William.
    2006 CiC 6MT
    ZHP, Cold Weather, Xenon
    Sapphire Black / Black Leather / Black Cube

  4. #4
    Join Date
    Jan 1970
    Location
    32.8 N, 117.3 W
    Posts
    7,618
    oh yeah... forgot about the passenger door thing. Make sure the car is fully unlocked or the button on the trunk doesn't work. I'm just planning on getting my car recoded for single click unlock everything.

  5. #5
    Join Date
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    "Flame suit NOT REQUIRED!!!"
    Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs

  6. #6
    Join Date
    Jun 2011
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    He said it worked from the remote and glove box so it sounds like the latch and solenoid are all working properly. I'm guessing part #16

    http://www.realoem.com/bmw/showparts...67&hg=41&fg=60

    William.
    2006 CiC 6MT
    ZHP, Cold Weather, Xenon
    Sapphire Black / Black Leather / Black Cube

  7. #7
    Join Date
    Jan 1970
    Location
    Lebanon, OH
    Posts
    37,864
    OK. Thanks for the assist.
    "Flame suit NOT REQUIRED!!!"
    Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs

  8. #8
    Join Date
    Jan 2011
    Location
    Charlotte, NC
    Posts
    89
    Sorry for the late reply. Yes I am aware that all doors need to be unlocked. I have tracked this down to the actual switch behind the trunk release button. I peeled back a small amount of the wire insulator from the input wire and the output wire and shorted across the switch. This activated the trunk actuator and thus tells me the switch is not functioning.

  9. #9
    Join Date
    Jan 2011
    Location
    Charlotte, NC
    Posts
    89
    Quote Originally Posted by wsmeyer View Post
    He said it worked from the remote and glove box so it sounds like the latch and solenoid are all working properly. I'm guessing part #16

    http://www.realoem.com/bmw/showparts...67&hg=41&fg=60

    William.
    Thanks for that! I will order the new switch.

  10. #10
    Join Date
    Nov 2016
    Location
    Portland, OR
    Posts
    191
    Hi all,

    I have this same issue. I ordered the switch, and have successfully removed the boot "ledge" that houses the boot switch,but cannot figure out how to physically remove the connector. I don't see an obvious way to detach the switch to install the new actuator.

    Any advice would be appreciated. Don't want to break anything.
    2004 330i E46 with ZHP performance package and cold weather package

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