Thread: 97 528i
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Old 08-18-2006, 01:39 PM   #8
2nd Gear Member
Join Date: Jan 2006
Location: Cleveland
Posts: 54
ive noticed that the gaskets are bad. i thought my leak was from the oil filter housing, so i changed it but i think the oil pan and valve cover are leaking.

is there anyway to check if one certain O2 sensor is bad? i bought one then realized there are 2 before the cat and then 2 after. i believe only the ones before the cat are bad.
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