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      05-19-2026, 03:48 PM   #6
N55e82Simon
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Drives: BMW 135i
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2011 bmw 135i  [9.33]
I’m in a similar situation but I’m confident it’s the sensor is on the way out. I keep getting the 1qt low (I always change my oil myself and at 5k intervals and it’s spot on) but then I will drive for a bit and it will go back to full. Sometimes I will drive and it stays in the ok for the entire trip and others it pops on at start up. Reason I bring this up is because it might actually not be low at all. You would have to drain and measure. But an extra quart won’t hurt anything as it seems to be common practice for the autox guys. Point being. Measure what comes out next time and it could too also be a failing sensor.
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