BMW E90/E91 tailgate: boot open error and opening
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Why does the BMW E91 tailgate show a boot open error even though it is closed?
The cause can be the lock striker, which has slid downward after the screws loosened. When the striker is set in the right place and the screws tightened, the fault is fixed. Moving the striker can also stop the tailgate from popping open.
Why does the tailgate not open electrically?
The cause is the opening switch or the tailgate wiring harness. The wires break at the tailgate's rubber boot, because they flex constantly as the tailgate moves. The fault is typical of Touring models, and it does not always produce a fault code.
How do you get the tailgate open when the battery is dead?
The tailgate has no mechanical key lock, so it will not open without power. Feed auxiliary power to the jump-start terminal in the engine bay, and the tailgate will open. Cars from model year 2009 onward do not have the key lock above the number plate.
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