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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > How to open trunk manually when battery is disconnected?



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      12-15-2012, 09:52 AM   #23
Beemw335
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You have to open the door manualy and then pull the trunk realese latch through the ski access "hole"
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      12-15-2012, 07:50 PM   #24
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when i did this i had bad jumper cables too.... tow truck was on the way when I tried another set. Now I always fold down the backseat just incase
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      12-17-2012, 11:14 AM   #25
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I had to jumper mine to get it open....happened once and I bought jumper cables specifically for this to keep in the car. However, smart me put the jumper cables in the trunk so when the battery died guess what? I can't get to my jumper cables! I bought some nice ones from wal-mart that include a handy bag so just slide them under the seat and you'll be fine.
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      03-13-2014, 05:56 PM   #26
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135i_dead battery_locked out of trunk

OK... So I have a 2010 135i. I was charging the battery in-place in the trunk with the negative battery cable disconnected. Closed the trunk lid and yup...couldn't get back in as the trunk latch is electric release.

Previous posts were correct, it's an easy solution, and a wise design by the BMW folks in lieu of a key latch or cable bypass.

I found this website : http://www.bavauto.com/ It has a complete list of beemers and the under hood electrical connections for this problem.
As posted, most of the Beemers have a positive electrical terminal in the engine compartment. In my 135i it's right behind the windshield washer fill reservoir, red-capped and marked as a "+" terminal.
Connect a set of jumper cables from a donor car to the terminal. (red to the terminal and black to a metal bracket in the engine compartment with good chassis ground connection)

You don't even have to start up the donor cars engine. Go back to the trunk and use the key fob button to open the trunk lid. Easy-cheesy.. Reconnected the negative battery terminal to the battery when the charge was complete. Car started right up and no reprogramming of anything required...

Cheers,

Mark (SF Bay Area)
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      03-17-2014, 11:18 PM   #27
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I crawled through the ski thing hahah.
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      03-18-2014, 09:53 AM   #28
Andrewe92
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hope I never have to go through this haha
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