5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
does the trunk release inside the car not work? the key remote not work? the trunk release between the license plate lights not work? the key only manually unlocks the trunk? when the trunk is open the lights dont come on? when setting the alarm it doesnt beep? only beeps when disarming the alrm? if these are your symptoms its most likely the trunk wiring harness located on the right back side of the trunk hinge, there are like 15 wires in that black rubber wire harness and they are either cracked or completely severed. pull the rubber boot out and down to expose the wires and they will be cracked somewhere in the middle! you can have the dealer replace the whole thing for around $500 but it will eventually do the same thing since they are replacing it with the oem part that is defective! your best bet is to have the wires spliced and welded together with an added 2-3 inches! i have the same issues that i am trying to resolve as well!! good luck! let us know what you find!
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