Leaves and other junk find their way into that area somehow and tend to stick around and get soggy creating a sort of compost that can cause you trouble if it gets into the drain tube.
How do dealers clean sun roof drains.
Up top you can clean out the gutters and drains of the sunroof or moonroof assembly with a shop vac.
Don t pay someone to do this it s too easy.
You may be tempted to run a coat hanger down the tubes or blast them with compressed air.
If the problem persists there may have been a drain you missed a faulty seal or faulty drain.
If you live in a treed area it can happen more often as there is larger particles floating around in the air which would eventually plug the drains.
Video tutorial on how to unplug a sunroof drain.
Two in the front and two in the rear.
Though the sunroof is sealed to keep most moisture out some moisture and water does come in through the gap between the sunroof and the car itself.
Depending on where you live sunroof drains may become plugged sooner than later.
Those tubes run through the door pillars and drain through to the rocker panels.
There will be four.
The drain holes will be in the four corners of the sunroof.
This video is of an old volvo b.
Open your sunroof and look for the drain holes in both front corners.
Locate the position of your drains and the nipples.
You might poke the wire right through the tubing or disconnect it from the drain hole.
The moisture is then drained out of the vehicle through the sunroof drains.
Water leaks caused by a clogged sunroof drain are very common and easy to cure.
These drains are normally feed through the roof pillars and exit.
The drain nipples will be on the front side of either door jam.
The rear ones may vary from car to car but are generally located on either side of the rear bumper.
The sunroof drains are an aspect of your car that you probably rarely if ever think about.