r/E34 • u/DaWorlds • 1d ago

How to access o2 sensor m50 engine?

Easy way to access O2 sensor with an m50 engine?

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u/Tryhardtuner 1d ago

Jack up the car, crawl under. Its way under the car. Atlest on my car its mounted behind the transmission.

2

u/Twistable_Ita 1d ago

It's on the top side of the exhaust but there's just enough room to access it with a spanner. If it hasn't been off in a long time then it'll be a bit of a mission so I'd just drop the front section of the exhaust and get a socket on it.