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1

I've had this problem twice in my 2001 325CIC (E46) and both times it was the oil sensor going bad.


3

The culprit is usually shot piston rings. They act as a buffer between the combustion chamber and the bottom half of the engine. If they go, oil can seep into the combustion chamber and get burned up along with the fuel. To fix this, they'd have to take the entire engine apart to get at the bottom of the pistons. It's not a cheap procedure. Or maybe you're ...



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