why does my BMW 3 Series G20/G21 (2019-2024) have a burning smell coming from under the hood?

Solution

1. Preparation

• Tools Required: Wrench set, OBD-II scanner, flashlight, safety gloves, and safety glasses.
• Ensure the vehicle is parked on a flat surface and the engine is cool before beginning any work.

2. Address Fluid Leaks

• Sub-steps:
  1. Identify the source of any fluid leaks observed during the inspection.
  2. If engine oil is leaking, replace the oil filter and/or gasket as necessary.
  3. For coolant leaks, replace damaged hoses or the water pump if needed.
  4. Clean up any spilled fluids to prevent further burning smells.

3. Replace Damaged Components

• Sub-steps:
  1. If serpentine belts or hoses are found to be damaged, remove the old components using the wrench set.
  2. Install new belts/hoses, ensuring they are properly tensioned and clear of all moving parts.
  3. Torque any bolts to manufacturer specifications as outlined in the service manual.

4. Electrical Repairs

• Sub-steps:
  1. Repair or replace any damaged wiring or connectors that exhibit signs of melting or shorting.
  2. Use electrical tape or heat-shrink tubing to insulate any repaired sections.
  3. Verify all connections are secure and insulated.