my BMW X5 F15 (2014-2019) gives a warning for low oil pressure, what to check?

Solution

1. Preparation

• Gather tools and materials.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid electrical shorts.

2. Check Engine Oil Level

• Remove the dipstick, clean it with a lint-free cloth, and reinsert it.
• Pull it out again to check the oil level; add oil if necessary, using the manufacturer recommended oil type.

3. Inspect for Leaks

• Visually examine the engine for oil leaks.
• If leaks are found, identify the source (e.g., oil filter, oil pan gasket) and proceed to replace any faulty gaskets or seals.

4. Oil Change (if necessary)

• If the oil is dirty or contaminated, drain the old oil by removing the oil drain plug.
• Replace the oil filter and ensure the rubber O-ring is properly seated.
• Refill the engine with the appropriate amount and type of oil as specified in the owner’s manual.

5. Test Oil Pressure

• Remove the oil pressure sending unit and install an external oil pressure gauge.
• Start the engine and check the pressure reading; it should be within the manufacturer’s specifications (typically 20-60 psi at idle).
• If the pressure is low, further diagnose the oil pump or engine internals.

6. Reassemble and Clean Up

• Reinstall any components removed during the diagnostic process, including the oil pressure sending unit.
• Reconnect the battery and dispose of old oil and filter properly.