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BMW 3-Series (E90 E92) Forum
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How to Open Trunk with No Battery.
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04-16-2014, 09:50 AM | #24 |
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Locked boot/trunk with Batt disconect
Just happen to me on my 320i 09/09 plate, after reading forum got in touch with BMW warranty and they suggested using a battery charger on the + - posts in engine bay tried it and it worked 1st time
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04-30-2014, 01:26 AM | #25 |
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How to open trunk
I didn't read the entire thread, so if someone already mentioned it..... disregard this post. Hopefully you can still get under your hood. If yes, get a battery charger, hook up the positive to the post sort of thing with the red pos symbol, and find a good , unpainted chssis ground and let it charge. It will work, I've been through it myslf. Like I said, if this was previously posted, my bad. If not, good luck.
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07-27-2014, 03:02 PM | #27 | |
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I can't believe BMW has no manual way of opening the trunk in situations like these. So stupid! |
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07-27-2014, 03:58 PM | #28 |
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This exact same thing happened to my e90 328i and I discovered your could get power into the system by connecting a battery/jumpers to two terminals under the hood. I couldn't figure it out so I called the AAA guy and he showed me that, felt really silly after lol.
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07-27-2014, 05:57 PM | #29 |
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My trunk actuator stopped working and I broke manual key wire(turned way too hard).
So had to take it to local shop. They had to remove rear seats to manually open trunk and replace actuator. PIA. |
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07-27-2014, 06:05 PM | #30 | |
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07-27-2014, 10:35 PM | #31 |
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This is what l would use...
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2011 335xi Coupe BSM (e92/N55/ZPP/ZCW, Alpina B3 Flash)
Bought 08/09/2013@53,340mi Current 3/13/2019@206,283mi Fail(s): tstat hous/water pump 89k, Chargepipe 106k, coolant tank 114k, FRM3 114k Maint: Walnut blast 101k, Trans/T-case Fluid 103k, OFHG 195k |
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10-18-2014, 01:45 PM | #32 |
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Thanks to this thread, I was able to open the trunk myself by following the OP's instructions. This was after over a week my car sitting in the drive and 2 different sets of mechanics tried to open by jump starting under the bonnet, even tho I told them I've done that already and charged the battery over night, but they wouldn't listen, and wouldn't follow the OP's instructions that I translated and printed off a copy for them. They said I'd have to break the trunk open,WTF, no f***in way its an ericsson trunk.
I had nearly given up, so called the garage to send a tow truck, the next morning when he arrived, he was helpful and also tried to jump it even tho I said its been tried, I showed him the translated instructions and he was up for it. After an hour or so the trunk was open and the positive lead was back on the battery again. He only wanted ฿500, ($15) for the 2 hrs of his time, but because he was more helpful than the others before him and he actually listened to me, I gave him ฿2000 ($60). So thanks to these instructions and 1 helpful mechanic, I was back on the road again. But now the f***in air-con doesn't work. lol. |
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10-18-2014, 02:43 PM | #34 |
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Are you guys aware you could actually jump start our vehicles from the Hood also?
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10-19-2014, 07:54 PM | #37 |
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Drives: e92 335i
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I had done the same with the key & charging under the hood. Thankfully it worked. Don't close your trunk once you take out the battery. Lesson learned for me too.
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10-20-2014, 11:28 AM | #40 |
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Blorax, thank you for starting this thread! I just got my 2011 328xi on Saturday and it arrived with a dead battery. My first step was to pull it to go charge it and I closed the trunk not wanting to leave the car unsecured. Naturally my car doesn't have a folding rear seat and since there's no exterior lock cylinder I tried pulling the trunk popping switch. I got some kind of reaction, but it wasn't enough to pop the latch. I was about to pull the rear seat when I decided to google the issue since I wasn't having any luck with jumper cables under the hood. When the car was delivered on Saturday the driver used a jump box to start the car so I know that there must be something else going on. Sure enough, one of the positive cables in the trunk was touching the floorpan.
For those that attempt this and don't want to cut into your wiring you can disconnect the front two connectors and pull the box down just enough to get a long Torx head driver in to unbolt the two screws holding it in place. Then just pull the box forward and down and you'll see the long sliding clip that goes the entire length of the rear connector. I used a flat tip screwdriver to get it started to the right and then it went smoothly. I pulled the connector out the back of the mounting bracket and had easy access to all the terminals which made it simple to find #12 and #23. |
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10-20-2014, 11:38 AM | #41 | |
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06-09-2015, 07:34 PM | #42 |
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Borax,
I know this is an old thread, but I just want you to know that I totally owe you a beer, or several, or maybe my first born. I absent mindedly closed my trunk after removing the battery on my 2011 328i to take it to the store to get a replacement. It wasn't until I got back that I realized what I'd done. After cursing, fuming and trying to dismantle the car to get into the trunk, then trying to jump the car using the terminals under the hood (nothing at all, had me a little worried I'd fried something), I finally tried your Macguyver disarming a nuclear bomb technique. I was totally freaked that I'd let the magic smoke out of my car... But it worked perfectly! Should we ever meet, drinks are on me. I won't be nearly as generous if I ever meet the person responsible for removing any reasonable way to access the trunk without power.... |
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08-02-2015, 02:35 PM | #43 |
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I'm fighting electrical Gremlins on my 2009 328i and have disconnected the battery so I can do other work. Well, last night my wife decides to shut the trunk, I guess to keep the neighbor's cat from getting in a claiming the trunk space as his territory.
I tried the manual key method, but because I thought I was twisting it hard enough and it wasn't working, I stopped. After reading this thread, I twisted it like a bully in the schoolyard and it worked. Thanks! |
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09-04-2015, 01:59 PM | #44 |
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Biorax, you are the man. You nailed my situation exactly and I had processed the other options until your solution. I found the wire, applied a short 12Volt and the trunk popped. The new battery went in & all is well.
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------------ 2010 e92 335xi premium & sport, 6speed. Project car. Alpine white, matte black grilles, mesh, staggered 18" matte black wheels/Nitto N55's. Lowered on STI's. Secondary cat delete, N54. |
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