my BMW 3 Series F30/F31 (2012-2019) has low oil pressure warning light on

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Engine Oil

• Sub-steps:
  1. Remove the oil filler cap and check the oil level with a dipstick.
  2. If the oil is low, add the manufacturer-recommended oil type (e.g., BMW Longlife 01 or 14).
  3. If oil is contaminated or old, proceed to drain the oil.
  4. Place an oil drain pan underneath the oil pan and remove the oil drain plug using a socket wrench.
  5. Allow the old oil to completely drain, then replace the drain plug and torque to manufacturer's specifications (typically around 25 Nm).
  6. Refill with fresh oil through the oil filler cap.

3. Replace Oil Filter

• Sub-steps:
  1. Locate the oil filter and remove it using an oil filter wrench.
  2. Lubricate the rubber O-ring of the new oil filter with clean oil.
  3. Install the new oil filter, hand-tightening it securely.
  4. Ensure no debris is present on the oil filter mounting surface.

4. Inspect and Replace Oil Pressure Switch (if necessary)

• Sub-steps:
  1. Locate the oil pressure switch using the vehicle’s service manual.
  2. Disconnect the electrical connector from the oil pressure switch.
  3. Remove the oil pressure switch using a socket or wrench.
  4. Install the new oil pressure switch and torque it to specifications (typically around 20 Nm).
  5. Reconnect the electrical connector.

5. Reconnect Battery and Test

• Reconnect the battery terminals, ensuring they are tight.
• Start the engine and let it idle, checking for any oil leaks.
• Monitor the oil pressure warning light to see if it remains illuminated.