BMW E46 E39 E90 E91 E92 boot Lid Trunk wire harness fault and how to repair the damage wires 

Many thanks Mundip, saved me long trips to service centre, not to mention the costs. I had done this repair myself on my previous e36, but I am 12 years older now. Fixed in 30 mins at zero cost, using only soldered joints. Without your video I would have cut the gaiter. I used a coat hanger to thread the replacement cable, soldering to the end and pulling it back through.

I literally had the exact same problem today and by watching your video, I managed to fix it all! Thank you soo much! I also had the same exact wires chopped in half.

Supeerrr. Thank you. On my 2002e46 318i was a grey wire broken in the same bunch of wires. That was the reason I had boot lid open light on the dashboard. Now it is fixed thanks to you. THANK YOU.

glad to see u didnt slice the weather strip out entirely like most people have done, my approach is honestly disconnecting all the wires from the components in the trunk lid (which are all just plug and play connections) and feeding them out entirely through the hole where the rubber boot is, a little more work but nothing is being compromised of its natural integrity.

I just found the same problem on my E90 320D. Without this video I wouldn't have looked for this issue at all. THANK YOU!

Thank you very much for taking the time to post this video as i had the same issue on my 325i E90.It took me around an hour to fix and i used a 13amp flex,connecters and electrical tape...cost me about £5,significantly less than going to an auto electrician. 😁👌👍

You are straight on point. i cant believe i found 4 wires broken, Thanks you so much for the video

Thank you! I had checked this harness but NOT thoroughly enough UNTIL watching YOUR video; upon which I discovered the very same two brown wires severed! They pulled up very easily.

This video was a life saver! Had exactly the same problem and found a broken wire in the boot harness. All sorted now. Many thanks ..

Thanks Mundip - I had exactly the same problem, and had no idea where to start looking for the fault, but came across your video and problem now resolved !

Great guide! If it didn't happen to me I'd think it was highly unlikely that just opening and closing the trunk would break a wire but sure enough, this was it. I was freaking out thinking it was something major. I actually just finished the repair, also by fishing a small gauge wire then pulling the new section back through. Some people are lazy and cut the sleeve but this isn't very hard at all and keeps everything looking original, not to mention perfectly waterproof. Again, great video.

Thank You. I managed to fix my boot thanx to this video.

Thank you Mundip, going through this exact issue, found the two wires, will head to hardware to grab the wires. Appreciate it a lot!!

I had light problem and when wiggled wires they worked and I thought would be expensive after watching your video I went out and fixed it cost me £9 thank you for showing me how easy it was

Great video, found I had five broken wires! Boot lock, fog lamp, number plate light, rear light one side, plus not sure what the other one did? Only thing though after about an hour trying to get a wire through I cut the cover and then finished taped it with insulation tape, looks ok plus the car is 12 years old so not too worried, but your video was a great help, thank you very much, probably saved me £150 plus.

Part #2320055 is a kit to replace the entire trunk wiring section with the rubber boot. I opted for this because I didn't want to have to potentially fix it "again" if other wires started having issues. The wires are pre-crimped and have heatshrink connectors ready to go.

Glad I came across this video it helped me locate a broken wire in the same place as you and now my trunk works again. Thank you!

Thanks! Had the same issue and fixed it this morning. Very helpful video.

Thanks for the video, just fixed mine - same issue

Brilliant! Great stuff man, thanks :D I started getting warning lights for bulbs and fog lights, then the trunk mechanism wouldn't open, this resolved it!

Many thanks mate. Going to give it a try as same problems. Thanks for sharing.

Good to see this is a common fault and not a car killer, I think the angle of the whole thing is wrong and just aids it

Thanks for this vid. Just managed to fix mine. Had one ground cable broken and about 3o r 4 with the insulation damaged.

Thanks that’s great help!!

This was the exact issue i had, thanks a lot!

Hey thanks for the tip. I did find this same issue on my E91 (wagon). Two wires had completely split, about 4 others were ready to go. Once I patched the broken wires all the issues I was having went away.

I racked my brains thinking about how I could fix two wires without ruining or being able to replace the rubber boot... and this was the perfect solution. Thanks so much for posting! Thanks for a concise, informative video too.

Great video, hopefully some of my wires in there are broken and causing the problems I have. Looking forward to checking it out

This vid is fruitful, thanks man you've saved me a lot of money. In my case it was 1brown wire .

Thanks for this! mijn central locking doesn't work with the key and my technician ruled out the GM5 module. Probably the same thing in the back of my E46 Touring. Going to check the wiring harness this weekend and apply the same fix if it has a broken cable.

Thank you thank you thank you!! This was my issue

Dude.... I had those exact 2 wires broken. Just like you I just pulled 2 thick broken brown wires out. And looking at all the comments, this is a very common issue that BMW should issue a recall for

Great vid. How's the general reliability of your 320i engine and how long have you had it for? What else has gone wrong on your car?

Thanks man. I have an E46 but this video was helpful. Through this video I managed to trace the problem.

Wayne Griffiths - I just did this repair on my car (only one brown wire snapped) and the two brown wires were slightly different thicknesses so probably how to tell one from the other.

Good job

Great video there mate... Just wonder on how did you manage to open up the boot lid when it got stuck close? Cuz my E90 (UK version 2011) got stuck and won't open up at all... No key holes and no wire latch or valet switch or whatsoever to open up the boot... Thanks for ur help

how long is the wire loom from there? was curious is possible to change the wire loom. or even get some flexy wire to replace all wires

I have this exact issue, I have a fault for bothering right tail light and reverse light.. both are located in the trunk lid. I wiggled the rubber covered joining harness and saw the lights flicker. Funny thing before this happened, for the longest time I had a fault code for both tail lights out and they weren’t out.

Thanks for sharing, had the same issue and glad I came across your video,it was easy fix,compare to the $400 at the dealer 🥂

Thank you! Have same issue will check tomorrow and im very sure its sameproblem on my 2005 e90

thank you - 6 years later.

Hey how's it going I have the same issue . Just wondering how long you had the error message before you fixed it ? Aproximate amount of ignition cycles ?? Thank you

My problem is just with the left license plate light and I’ve switched out the hosing with a new one, looked inside the cover for frayed wires and looked under the rubber connection for split wires like yours and can’t find the problem, I’m getting 0volts, any ideas?

what wire color is the tail light bulb? BMW e90

So happy to see this video coz it helped me what the issue with my car. Just a question, I tried to go buy the wire but they're asking me what is the gauge of the brown wire as well the green and yellow, would you happen to know? Thank you

2:45 When I took the rubber connector off the car, there is another rubber cover that keeps going inside my car... so I cannot see the wires on the car body side... how do I remove this?

Haven the same problem,tail lights on my boot left side not working

the classics

This seems like a very common fault in e90/91. Fuse 77 keeps blowing too. The boot light stays on (even though boot is shut) - then fuse blows - car steams up!

Excellent video, I now know the fix, but I cant access the boot. Key remote not working, no boot switch in glove and no manual lock to open with key. My boot is completely inaccessible E90 2011 318d

Hi I was curious how tell which Brown wire was which? Maybe I missed something in the video?

Having exactly same problem… pls help

I have a 2008 bmw e90 saloon and my boot has just stopped opening, and the number plate lights along with rear lhs fog, reverse and lights have stopped working, I assume this may be the reason?

My bmw opens the trunk when i switch on the headlights and also when i press the brake pedal with lights on it triggers the trunk switch on and off, can the problem be those wires.thank you

Hay I had number plate lights out plus no auto boot or left hand reverse light + light on boot lid + light in boot out ,and guess what ! It was that bloody brown wire,much thanks

Hello, my bundle has a single wire cut on my BMW E90 and the trunk no longer opens. The problem is, I can't see how to open the safe from inside the safe. I do not see a manual control? Someone could help me, because without opening the safe I cannot fix my harness ... Thank you all for your help

What is the voltage of the wiring

That annoying rubber