water
 

2003 325XI, pulled the passenger front floor mat to vacuum and the carpet is wet, where is the water coming from?? No smell of coolant so I'm assuming its not the heater.

Check for worn door seals. Idk if it's possible for water to leak in from the engine bay but check the door seals first.

Could be the vapor barrier in the door too.

excellent, thank you!!

This.