Tailgate not opening - MINI Cooper Forum

Second Generation Faults & Fixes MINI faults and fixes Late 2006 - Present

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post #1 of 7 (permalink) Old Mar 29th, 2014, 06:23 AM Thread Starter
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New Zealand Tailgate not opening

I just purchased a 2010 R57 and have since found out that the tailgate will only open via the remote control and will not work via pressing the button on the tailgate itself.

There are plenty of posts about the reason for this being water ingress into the switch so I thought since I have to pay for whole new $100 or more part because of a $2 micro switch I will see if its fixable.

After removing the part off the boot lid I could here water sloshing around and there was plenty of water to be drained.

Attached are some picture of the muck in there and there is plenty of corrosion on the circuit board where it has started to lift in places so not sure how repairable it is and if bypasses are needed. It's too late now to go and buy a micro switch as the shops are closed, I will try to repair it tomorrow and upload some more pictures.

Has anyone attempted this before?



Last edited by burnstar; Apr 18th, 2014 at 11:01 AM.
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post #2 of 7 (permalink) Old Mar 29th, 2014, 08:32 AM
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The micro switches fail quite often, Ive had the same thing on a couple of cars, fortunately all were still under warranty, just shows you how poor they are if they dont even last 3 years before failing due to moisture ingress.
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post #3 of 7 (permalink) Old Mar 29th, 2014, 12:11 PM
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Yours looks pretty far gone, but it's worth pointing out for any other Convertible owners that it often does not require this drastic a level of repair.

The fault seems to arise because the Convertible boot lid fills with water, given away by a sloshing sound when it's opened or closed. So it's possible that two simple actions will fix this problem:

1) Let the boot lid drain by removing the rubber bung around the cable sheath coming into the base of the boot lid as shown in the photo below. Once this bung is removed (and thrown away) and the boot lid is closed, the water will drain out .



2) Let the boot handle dry out. Just leaving it with the boot lid drained may achieve this but on mine I took off the boot handle and stuck it in a very cool fan oven for 30 mins, after which it worked perfectly.
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post #4 of 7 (permalink) Old Mar 30th, 2014, 02:35 AM Thread Starter
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I noticed 2 things on mine:
1. It doesn't have the seal around the boot lid switch that I've seen mentioned in other place.
2. The switch circuit board itself was flooded with water and there was no way for this to drain as it was sealed, the only way for water to get in was from the top where the cable comes in.
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post #5 of 7 (permalink) Old Mar 30th, 2014, 08:48 AM Thread Starter
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Success!
I went and spent 95 cents on a replacement micro switch this morning and after to soldering and reparing part of the circuit board track I have a functional boot switch.


A liitle bit of liquid electrical tape for some water proofing


Now to see how long this lasts! but for now it beats the min $100 on a replacement part

Last edited by burnstar; Apr 18th, 2014 at 10:58 AM.
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post #6 of 7 (permalink) Old Jan 7th, 2015, 07:50 PM
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Mini Cooper S Convertible Boot Release Fix

Same problem here; my 2009 MCS Convertible boot release just stopped workingonly opening with key fob. Took the entire handle strip off and opened the sealed strip with a Dremel Cutter. No water or corrosion at all inside the PCB area but the button had disintegrated. Went to Maplin bought one of these: 105A Tactile Switch | Maplin refitted the brown square button on top with a bit of silicone around the edge to hold it in place and it now works just fine, saving around £100 !!!
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post #7 of 7 (permalink) Old Jan 8th, 2015, 04:41 AM Thread Starter
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Glad you got it fixed, mine is still working 10 months later even though the PCB had quite a fair bit of water damage.
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