BMW X5 E70 washer fluid leak and water in the footwell
X5 E70: washer fluid runs into the driver's footwell, where is the leak coming from?
Often the rear washer pipe joint leaks, located between the front and rear carpets. Access requires removing the driver's seat and the sill trims and lifting the carpet. The repair is replacing the pipe with a new one.
Why does a leaking washer hose damage the wiring harness?
The hoses crack at the point where they go inside the taped wiring harness. The fluid does not show outside while the tape is in place, and it oxidises the wires. The wiring harness may have to be replaced if the hose has leaked inside it.
How do you remove the washer fluid reservoir to check for a leak?
The reservoir comes out from inside the fender, and the biggest job is removing the inner fender liner. The pump seal can leak, but replacing the seals is not always enough: the leak can be in the hose joint from the pump onwards or in the rear window or windscreen hose.
Why is there standing water under the brake booster?
The rubber drain valve of the drain hole may be blocked with sand and leaves. It was cleared with compressed air and flushing with water.