Water getting in from underneath

[Jagera]

I have a 2002 206 3 door. There is water coming in from underneath the rear seats, causing the sponge to become saturated. I also noticed this in the boot, underneath the material cover there's a pool of water.

This only occurs in wet weather. It's definitely not coming from a window or anywhere above.

There are rubber caps/seals in both the boot and rear seats where it looks like the water is coming through.

Also, the right-rear tail light looks like it has condensation in it. It's been there a few weeks.

Before I dive under trying to find the problem - maybe someone can point me towards the likely cause, and even better a solution!?

[danthevan]

If it was coming up from underneath, then it would run out the same hole it was coming in through, so i'd forget about that one.
Usual culprits are rear light clusters, arial, sunroof drains, door drains etc

[Jagera]

Thanks for the reply. I found this thread from a while back mentioning the rear light clusters. Sunroof is a no go for me, don't have one.

I am going to get some sealant and try this method. I assume I can apply some sealant around the aerial base aswell, just to stop water getting in?

It just puzzles me how water is getting into the underside rear seats and boot, if it's coming from the rear/aerial/side doors.

Adding to this, is there any chance this will have caused rusting issues?

[Gibbo]

I've had this before. I took out the rear light clusters and removed the boot rubber strip.

I then cleaned the 9 years of gunk that had settled, made sure the sealing gasket on the rear light clusters were flat and re-attached everything nice and tight. Dry as a bone afterwards. Things just get mucky and work their way loose over the years of running.

You can also use a bit of clear silicone as well for added protection.