Fix of water leak into boot on Corsa C

Water had been leaking into the boot on our Corsa for a while so I finally decided to repair it as a musty smell had started to develop because of the dampness.

First step was to remove the black plastic trim , all carpets, and so on, on the left hand side of the boot as this was the area where the water seemed to be coming in. I then went into the back of the car and observed while my wife played a hose on the back of the car. Before long water was pouring down the inside wall of the outer skin of the nearside wing. It was building up between two skins below the lights and flowing into the boot through a hole there.

When I got out and looked around it was soon obvious why it was happening.

When the car was built a bead of sealant is applied along some of the seams but on our car a bit had been missed. Surprisingly it has taken many years to show as a problem. I sorted it by putting some silicone sealant into the gap and then tapping the metal shut with a cold chisel and hammer and then putting more sealant over the top. The photos show it more clearly.

There is a rubber plug in the boot which I removed some time ago to let the worst of the water out. Corrosion had started to develop around the plug so I angle grinded the rusty paint away and put some under-seal over that, see photos.


The problem area stripped of paint


silicone rubber applied, excess will be trimmed of later


zoomed out view so you can see where we are on the car


View of the rusty bung hole in the boot, it didn’t look as bad in real life


Area cleaned with angle grinder ready for under-sealing


Zoomed out view showing trim removed and the rusty bung hole on boot floor.


13 Responses to “Fix of water leak into boot on Corsa C”

  1. Hi, ive started this process earlier. Is it nesessary to remove all the trim as i have started and I can see its a big job, Thanks for the help, Callum

    • gtouser Says:

      Yes it was necessary in my case because it was getting in behind the black plastic and I couldn’t see where till I removed it. If the seam is opened on the outside same place as mine you could just try sealing it and see what happens. It only took about 20 minutes to remove it though so not as bad as it looks.

  2. Rob Squire Says:

    I’ve got the same problem with my 02 1.2 sxi corsa water has leaked into the boot amd soaked all of that and has also managed to work it’s way through to the rear seats making them permanently damp. Do you think it would just be this problem causing all the water to leak in?

  3. i have the same problem as Rob Squire on a 04 1.2 SXi, my spare wheel well does fill up with water aswell, i’ve also got the damp smell !! info & pics above are brilliant, well done, gtouser !!!!

  4. Hi, Thank you for creating this blog. You have helped my neighbour finding the same problem with his Corsa, which was causing a bit of frustration. We are going to fix it on the next dry day.
    How difficult is the rear bumper to remove? Also, will the trim over wheel arch have to be taken off first?
    Thanks again

    • Very easy to remove, just lots of screws to take out. I took both off, but it depends where the leak is, you might get away with just the bumper removal.

  5. Hi, I think I have the same issue – quick question,
    Can you describe how I remove the bumper, is it just a case of the three/four torx nuts under the boot lid and arch bolts? thanks

  6. Do you need to jack-up the car to remove the bumper or just get underneath it. Never done this before and we have the same leak.

  7. Thanks I will try and do the same

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