Q: Back passenger side only floor is soak and wet ..water squirting through matt wh on 1997 BMW 528i

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Water squirting through matt whole also
(1) Answer
(3) Comments
You just need to seal it? Use undercarriage coat on the locations underneath and a waterproof marine style sealer inside vehicle like "Goop".
Have to pull up carpet and find where the water is splashing through. Should be a visible hole or rust to follow. Then seal top at this spot and underneath.