1992 BMW 325i won't start

[dbloom4321]

Just got my O2 sensor replaced in my 1992 BMW 325i and the car was running great for 2 days, but then I parked it at a friends and about 2 hours later the car would not start. All the lights work it and it turns over but doesn't actually start. When I press the pedal it does nothing.

[shunn]

it's rather simplistic, and wouldn't cause a no-start condition, but unplugging the o2 sensor then try starting the car. you should check for fuel pressure and spark. if you don't have either then check your crankshaft position sensor.

[bmwdirtracer]

The O2 sensor has nothing to do with it.

You may have no fuel, or no spark, or a squirrel in the airbox.

Check for fuel pressure and spark, first.