As Geof and Gaz has said ....Water gets in behind inner arch on passenger side,travels up to a loom which has a black box wrapped around it with no waterproofing so water puddles up inside and travels down loom into plugs in passenger footwell and causes numerous issues like wipers, acd and light problems too name but a few.
I am speaking to Mitsi about it and they refuse to accept is a manufacturers warranty unless I pay mitsi to a diagnostics on my car and even then it is up to mitsi to fix it under "good will" as its out of warranty
I have posted up over the road also and have had no takers but im sure if all who have suffered this problem got together and "fought: mitsi they would accept fault and fix them....
Mitsi will not just re-wire and fix the plug either they have quoted 800 quid to rewire the whole lot !!!!
Even if people dont have this issue by driving there car in the rain they will get it through washing if they clean under the car !!! So its BLATANTLY a design fault but Mitsi dont agree !!!
If you have a 7/8/9 with this issue and have photos please send to me with your name and addy aswell as vin number of car as I am NOT lying down on this one and if we get enough folks together Mitsi have to listen, IF not im thinking watchdog or some sort of consumer agency ???