Thanks for joining. The original poster hasn’t been back to the forum since February, so it would probably be best to send him a PM.
You will probably find there are vent flaps near the bottom of the rear quarter panels and these could be the issue, but of course it depends how high up the water is starting.
I don’t think there is much way around this other than to remove the inside trim panels to source the leak.
Perhaps you could come back to us with whatever you gather.
Kind regards,
Gareth.
I have the same problem with my A3.
I think its coming in the quarter light windows. I had the hose on mine and the inside of the rear quarter was wet. I'm in the process of sealing the rubbers.
Water leak in boot rear passenger side.
in Audi A3 (8V) Forum
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