Water in the rear lights

[drfrank]

Hi,

My mate's E46 M3 has water collected in the rear light clusters (with a couple of LEDs out).

Any suggestions for getting it out easily, or does the whole cluster need to come out!

Thanks

[belleair302]

Sound slike the seal has gone or he has been using a jetwash to clean the car. It is a case of taking the whole lot off and replacing....but replacements are not so expensive if sourced well.

[Neil.D]

There should only be 4 nuts holding the clusters in. Disconnect the wires and take it out. There are numerous drain holes behind it which easy block. Put the light housing on top of a towell on a radiator for a few hours and it should clear.

[drfrank]

Thanks for the info, I will pass it on !

[Morningside]

While it is out just check to see if the contacts to the bulbs are ok. I kept getting bulb fail warnings even though the lights DID work!
As I could see where it had been arcing (due to some corrosion) I narrowed it down to a poor contact giving a false reading.