AJH

Hi,

Just something I noticed while removing the plastic housing underneath the o/s pollen filter.

There is a void underneath the brake servo with drain holes to prevent water building up. The drain holes had become blocked with leaves and there was a good 2 litres of water in there. I unblocked the holes with a few cable ties and the water drained away. I didn't check the other side of the car where there seems to be lots of expensive looking electronic control units . There must be other people out there with the same issue.

Thanks

luigi524td

Good idea ... I use an air compressor to blow leaves and other debris that collects around the under-hood microfilter holders. Now ya got me wondering what junk lurks under them??

THX for the heads-up!

AJH

The drain hole for the plastic tray, underneath the pollen filter was also completely blocked with organic matter. It's located on the outer edge of the tray exiting into the wheel arch area.

jaycal3

Just had a flooded interior passenger compartment as a result of what you just explained... almost $7,000 in damage (thankfully USAA insurance is awesome!) The only way to access the drains completely is through the wheel well... if it backs up it will eventually empty into the passenger side of the car and there is at least 2 modules in the ebox above the drains on the passenger side under the cabin filter and one major module in the passenger floor which controls active steering, transmission etc...

Here is My link...

Clear them and all the other storm drains... I have my car back now but it took almost a month at BMW and a lot of hassle to get it all right!

AJH

I'd noticed various rubber bungs with cables routed through them leading into the cabin area. I thought the watermust be able to get inside via these rubber bungs.
The windscreen picks up the leaves and is washed down into these areas by the rain. Mine were completely blocked. Best check the other side!!

tsaros

This is a fairly common issue so a check once and a while is not out of order, im guessing that those who have their cars parked outside should check it a bit more often.