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Water leak, wet footwell

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Hi, I'm new to this forum and understand how valuable some of the information supplied by fellow owners can be. One evening the alarm started to sound on the vehicle which I could not turn off using the remote. It was raining quite heavily and had been for some time so I thought it may have been over sensitive.

I checked the vehicle to investigate further and noticed that the footwell in the driver side was soaking wet. I had had the wet footwell problem previously and thought it may have been due to clogged pipe or build up leaves/debri just under the filter, however this was not the case. As I got into the vehicle I tried to drive, but the car thought that the driver side door was still open and would not let me move more than a few feet before stopping automatically, clearly there was an electrical fault due to the leak.

I had the vehicle towed to a BMW specialist, I had to have all the rubber seals replaced and electrical wiring fixed. The water was leaking through the front windscreen as the seals had started to leak, to my knowledge the windscreen was still the original so I have no idea how it had started to leak.

Just for reference if you do experience wet footwells it can be due to the rubber seals to the windscreen.

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Can offer some advice for anyone with a similar problem, not same car but similar issue i had...

I also have a saab 93 which recently had the same issue.... Especially when I defrosted my front wind screen with a jug of warm water it would pour through....

What I found was that if i lifted the bonet and poured a jug of over windscreen, I could quickly see where it was pooling up inside the bulkhead where it should usually escape down a drainage Chanel ..... It was easy to see by forcing the issue with the jug of water....

Just had to strip a few bits out to get at the blocked drain and poke it clear with a long reach screw driver.....

Have a look, use the jug of water to exacerbate the issue to the extreme.... You'll find it..

Edited by Wonky

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Hi, I'm new to this forum and understand how valuable some of the information supplied by fellow owners can be. One evening the alarm started to sound on the vehicle which I could not turn off using the remote. It was raining quite heavily and had been for some time so I thought it may have been over sensitive.

I checked the vehicle to investigate further and noticed that the footwell in the driver side was soaking wet. I had had the wet footwell problem previously and thought it may have been due to clogged pipe or build up leaves/debri just under the filter, however this was not the case. As I got into the vehicle I tried to drive, but the car thought that the driver side door was still open and would not let me move more than a few feet before stopping automatically, clearly there was an electrical fault due to the leak.

I had the vehicle towed to a BMW specialist, I had to have all the rubber seals replaced and electrical wiring fixed. The water was leaking through the front windscreen as the seals had started to leak, to my knowledge the windscreen was still the original so I have no idea how it had started to leak.

Just for reference if you do experience wet footwells it can be due to the rubber seals to the windscreen.

I'm sorry mate, but I don't buy this. The windscreen is physically bonded to the car with automotive grade adhesive. If the screen is original, it's VERY unlikely it would leak. If it did, you'd have noticed it before now. If the screen had been replaced badly at some point, then a leak is more possible. The trims around the screen are purely cosmetic, and are not designed to be water tight

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That was what I thought to be honest... Two possibilities..... Your right it was a replacment screen with a fault, or, I'm right, they cleared your drain in about 5 mins then charged you for a screen ???

Doesn't add up..... Unless they were talking about the rubber window seals on the front drivers door , not the windscreen ?

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How wet are we talking - very wet or damp?

 

Put your hand on the wet patch and check to see if it feels a bit greasy and has a smell to it as worst case it could be a leaking matrix. Although even the worst BMW garage in the world would have spotted this ;)

 

If you have not had screen changed (as mentioned its bonded so highly unlikely to leak) and the door seals are all good I would check under the firewall trim. Take off the wipers and the trim and have a good look to see if there is an obvious cause. 

 

Also take out cabin filter and check under that as water may have filled this somehow?

Edited by 1UP

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In very heavy rain, my E61 530D had its rear RH foot well filled with water. The ducts under the driver's seat were wet all round inside. The 'Scuttles' under the bonnet could not cope even though they were clear, so the rain ran through the heater ducts into the rear foot well. I carefully cut a flap in the carpet and this revealed a rubber plug that I removed. No point in replacing this unless you drive in deep water as the under floor panels prevent splashing through the holes. 

 

As water can also enter via the door inner sealing it needs to be able to escape or electrical problems can occur. Unfortunately there is very thick foam under the carpet which soaks all of this water up and take ages to dry. Placing some plastic 'Battens' under this can keep the foam clear of the water, but the carpet does not allow flow through it. If overmats are used, a judicious hole cut in the carpet is all that is necessary. The car has a complete plastic under panel. Removing this may reveal even more rubber bungs that can be removed to prevent water accumulation and subsequent corrosion. I have removed floor bungs in all of my previous BMW's. 2002, E3 2500, E28 525e and E46 330D. So far, no downside to any of this.

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