Car leak

Asked by Dec 26, 2015 at 09:05 PM about the 2012 Volvo S60 T5

Question type: Maintenance & Repair

I have a 2012 Volvo S60. The car has developed a leak where water settles on the floor mat below the drivers seat. It leaks only heavy rain and windy conditions. The car has been to the dealer 3 times and they can't find and fix the leak. It is at the dealers now and they are waiting for an answer from corporate. The car has a sunroof. They checked the sunroof and weather stripping and they brought in a specialist and the leak still has not been found. Does anyone have a similar problem and where could this leak be coming from? Please advise. I'm concerned that the electronics could be damaged from this leak. All windows and the sunroof are closed tight. The weather stipping looks to be in good condition. No tears or crackes were noted. I need some help with this. Thanks.

3 Answers

71,405

On my car with a sun roof, (but was not the problem) had a leak also. I had like 2" of water in it from the weather. Took it to our dealer and they did a smoke test. They were able to find leaks not visible to the eye. They fixed what they could see and have not had a problem since.

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Ed, did they find the problem? Usually the sunroof itself along with the weather stripping is fine but the sunroof drains need blown out. This is especially true if you park near any trees. Natural bits of debris get clogged in the elbows of the drain tunes for the sunroof.

Just fixed my 2004 S60 that was leaking rainwater into the cabin and leaving puddles on the floor mats. Like Volvo_girl said, I suspected the moonroof drains but the moonroof hadn't worked since I bought it. I tried to manually open the moonroof but I didn't see the usual hex nut underneath the dome light so I gave up on that idea. Then I took the right side front tire off, pried down the front part of the wheel well cover (looked like i wasn't the first), and unplugged the siren module with needle nose pliers. I then put the wheel well cover back with zip ties where the rivets were. I put the key in the door and locked/unlocked quickly 3 times. At this point my moonroof worked so I could open it up and clean out my drains. I snaked them a bit with a zip tie and then blew them out with compressed air. One final test showed the water draining from the moonroof to the street as it should. Left a fan on all night pointed at the floorboards to dry the carpets.

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