BMW 525i Low Oil Pressure Warning

BMW 525
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KAZ
  • MEMBER
  • 1 POST
I recently bought a BMW 525i. Everything was ok, but suddenly the computer is telling me that the oil pressure is low, I checked and filled the oil and the transmission oil, but the light still stays on. I do know that when the engine was overhauled, just before I bought it, the sensor was damaged. Could this just be a computer problem, or is it serious?
Feb 15, 2006 at 4:01 PM
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PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
The oil pressure sending unit is a small bolt like item. It simply screws in and has a wire connection on the opposite side.. Price is under $20. Replace it first. Running an engine with no oil pressure will ruin it in a matter of minutes.
Feb 16, 2006 at 12:22 AM
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Suggested Repair

Replace the oil pressure sending unit first. It is a small bolt-like sensor that screws in and has a wire connection, and it typically costs under $20. Do not keep running the engine if oil pressure is actually absent, because that can ruin the engine within minutes.

Conversation Summary

The owner of a BMW 525i reported a low oil pressure warning that remained on after the engine oil and transmission fluid were checked and filled. The oil pressure sensor had been damaged during a recent engine overhaul. The expert advised replacing the oil pressure sending unit first and warned that running an engine with no oil pressure can ruin it quickly.

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