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Q: I replaced my camshaft sensor and it's leaking oil from under it

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My camshaft sensor on my bmw 335i n54 engine is leaki oil. I bought a new sensor and replaced it last week. Just started noticing the leak coming from the sensor.

My car has 72200 miles.
My car has an automatic transmission.

The Camshaft Position Sensor (CMP) has a small O ring around the flange where it fits up against the engine. Most of the time when I’ve bought those parts, the O ring has come on the part, so you don’t even notice it. It’s possible that the O ring was not on the part and you installed it not realizing it should be there, Or else the O ring got pinched when you pushed the sensor into the hole. It’s easy enough to solve,just pull the sensor back out and look for the o ring seal. If that isn’t the problem, then you can contact Your Mechanic to have a technician come to your home or office to check out your oil leak and let you know what can be done.

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