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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > E93 boot leak fix with pictures



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      10-31-2014, 10:56 AM   #23
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Water in my E93 cabrio has just fried my amp on LHS but water has affected the DAB radio control unit and the Bluetooth c/unit in middle and RHS near the back seat rest as well. Parts alone are £2562!
Will give your excellent advice to dealer. Thank you!!
Any advice where other water may be getting in?
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      11-30-2015, 06:13 PM   #24
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Really glad I found this thread, it's been raining quite hard on and off for a few weeks now in the West of Scotland and last night I noticed a couple of drops of water, passenger(left)side , just on the flat bit next to the rear head rest.

After a quick search last night I then today checked the small storage bit in the boot as a few people had suggested and found a puddle about an inch deep.

I'll be trying this great bit of advice first chance I get, so a big thanks to the OP even though it's an old thread.

I do have one curiosity though, why is there a plastic plug where water is meant to drain out?, i'm presuming it's a plug that water can pass through and is just becoming clogged but wouldn't it just be better leaving it off once you get it off?
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      12-01-2015, 03:21 AM   #25
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Im so glad you bumped this thread because mine is doing the exact same, in the same place. I will be checking this at the weekend!
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      12-01-2015, 07:08 AM   #26
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Very useful guide, thanks! I'll check mine this weekend too.
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      01-12-2016, 02:33 PM   #27
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I am guessing this has nothing to do with water running in the boot via the top rubber seal?
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      01-12-2016, 02:35 PM   #28
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Just to add-its as though the rubber needs re moulding where it is leaking.
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      01-12-2016, 07:20 PM   #29
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Thanks for posting. I'll be keeping an eye on things.
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      01-21-2016, 02:16 PM   #30
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Anyone??
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      01-21-2016, 02:19 PM   #31
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Wow. Mines never leaked. I'm in Florida and it rains more days than Seattle. 2008 with 226k miles. I'll keep a watch. Original pics are dead. Where am I looking?
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      03-16-2016, 04:53 PM   #32
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boot leak resolved

Hi I had a leak now resolved.
Since i owned the car the car some times had condensation in the inside. there was recently 4 days of heavy rain and it got much much worse. The boot interior around the battery was damp and the rear lamp had condensation in it.

i exposes the battery and noticed water so i ordered some cheap tubing and siphoned put two buckets of water! i looked on you tube and saw some videos and did some tests with a hose but nothing. i gave in and took it to my local garage in (deep cut garage gu16 6ez) and they put an engineer in the boot with a tourch having removed the battery. they noticed watwr was running into the battery well from the rear. they removed the bumper and saw how water ran off the body work and onto the chassis and through a crack in the welding in to the battery well.

they advised that the car had previously suffered rear end damage ans that when this was repaired this was not spotted and it was about two grains of rice in size, now filled and the bu,pwr back on... no more water in the well..

so looks like there are a few ways for this to leak but if anything i would say remove battery and get a friend to shut you in and then watch the leak come in. you may need to remove the bumper as the outside body work allows water to run against the chassis / outside of the battery well.

i was charged £126 for 3 hours labour and parts inc vat. so its pot luck how quick they find it but i think that price is reasonable as left un checked the damage to the wireing loom would be expensive.

i chose this garage as they are an authorised repairer for allot of insurance companies and they service / repair emergency service vehicles so they have allot of experience with a wide range of cars. somthing to think about. A BMW garage i think are more used to new shiney cars and dont see so much of these sorts of issued as most insurance companies will never authorise a repair to be done by bmw
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      12-18-2017, 11:19 PM   #33
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Thanks much to the OP. I'm having same exact issues. Water in battery tray and no sound (possibly blown AMP) I will raising my car and checking the the drain.
So on the drain plug all you have to do is turn it. There is an arrow on the plug. Once you turn it you should be able to pull the plug right out. Easy peasy. I did this on both sides. Unfortunately mine did not seem clogged up. I had some old fuel tubing about 3-4 feet worth and slid it up as far as it would go. I did not pull out any debri etc... So I guess I still have a mystery of how I'm getting water in the trunk.

Last edited by GEOS07335i; 12-19-2017 at 02:12 PM..
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      02-18-2018, 02:43 PM   #34
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Hello all,

Couple of things. First, this fix is ONLY for the convertible E93 cars. The drain plug is for the convertible top drain and if it is clogged, the top drains down the back into the trunk along the roof rails.

I have 2 E93 cars and the left trunk compartment in one of them flooded during some heavy rain, shorting the ground to the amp to give that whining noise. I've been there on other cars, so I knew it was a bad ground or wet wires. Fortunately, I was able to remove the amp and dry it out.

To clear the drains, I jacked up the car enough to get a T30 torx driver into the two screws used to hold the panel/mud-guard covering the drain plug. I popped out ONE but not BOTH of the plastic rivets so I could move the guard out of the way. I popped the front one since the other one is up in the well further and impossible to see. The drain plug/baffle is a 14mm hex driver and is installed bayonet style, requiring only 1/4 turn to remove. Mine dropped right out.
I then used some semi-stiff wire to flush the debris out of the hole.

I'll try to attach an image.

When re-installing the two torx bolts, be VERY careful not to overtighten them as they are fastened with plastic speednuts.
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      04-05-2018, 01:21 AM   #35
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Thank you to the OP for this guide. I too got about 4 litres of water out of one side (I could hear it slushing around while driving.)

Can I add a warning for those who are trying to clean out inside the drain with a wire.

I did this but got the wire stuck in the bottom of the electric window regulator, this interfered with opening the window (and hence lowering the roof.).

Getting this back out required stripping the rear quarter and pulling the whole unit out from above, which took about 4 hours all in. No lasting damage but a pain to deal with.

Other thing is the drain plug/baffle on one side got broken. Does anyone know the part number or where to order a replacement?
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      01-27-2019, 03:04 PM   #36
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I just checked the roof drains on my new-to-me 2007 E93 with 85K miles. My conclusion is that it has lived a fairly sheltered life; there was a wee bit of crud in the helix drain thingies, but zero water came out. Dry as a bone. I ran some weed whacker cord through all of the roof and side drains I could find while I was in there, and checked the condition of some of the other drain bits such as those wacky pin-operated valves. All looks pretty good.

Anyway, thanks a ton for the pictures and words in this thread. Very helpful!
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      07-10-2019, 05:43 AM   #37
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found original pictures...

Hi all, anyone with An E93 might know about water ingress into the boot. After much research it seem to be the tubes that drain water away that get clogged with debris.

Now BMW will charge about £600 to remove the roof to gain access to the top of these tubes ....... however, after much research I found a way to clear these from under the car

My boot was dry all bar a few drips but I did have some water on the nearside quater light after retracting it even though it has not rained for ages!!!

So to access these drain tubes you need to jack the rear of the car uo and just infront of the rear wheel is a rubber mudflap thing. This needs to be removed by removing one panel type plastic fixing and two plastic T25 bolts.

Mud flap thingy



This is one of the T25's and the other is just behind the flap.


Once done you can swing the mudflap away exposing the round plastic drain plug. This you need to twist a bit and it should come out.




This is what you will see once the mudguard is removed
From the side this is the bit that gets clogged with muck and then the water backs up



Once removed about 4 litres of rancid smelly pond water poured out and this was the same side as the wet window. I did the same on the other side but apart from some gunk it was dry.

I fed some flexible garden wire all the way in and it went about a metre up and you can here it rattling about behind the panels. This will ensure no blockages further up.

Cheaper than £600 eh and worth doing to all E93's

Hope this helps someone out

Jon
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      07-16-2019, 03:52 PM   #38
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Can anyone help

Iíve had my e93 for 3 and a half years now and every time it rains I get water leaking onto the rear side bolster and a puddle in the cubbyhole in the boot.

Iíve tried jacking the car up, checking the drain plugs and having a poke around with some wire but nothing came out.

Is there anything else that I could check/clean or has anyone else had this problem even after checking the drain plugs

Dan
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