If you’ve followed either this blog or my Twitter account for any length of time, you will know that I have been dealing with ongoing water ingress issues with my SEAT Leon for almost as long as I’ve owned the car. This is a common problem on most, if not all, early Volkswagen PQ34 platform cars; the material they used to seal the places where water can get in was of a poor quality, and breaks down over time.
The first winter I had the car revealed the extent of the problem. All the door seals had broken down earlier in its life, and been repaired incorrectly by one of the previous owners. After several weeks of wet weather, I discovered literal puddles in the car, mostly in the passenger footwells. It took forever to get the interior dried out, and involved some tedious work to repair the door seals. The pollen filter housing seal had also perished, though that was a simple task to replace.