why does my BMW 3 Series F30/F31 (2012-2019) have a strange smell when I drive

Solution

1. Preparation

• Tools Required: Safety gloves, rags, flashlight, OBD-II scanner.
• Ensure the vehicle is parked on a flat surface and the engine is turned off. Allow it to cool down before working on any engine components.

2. Cabin Air Filter Replacement

• Sub-steps:
  1. Open the glove compartment and remove any contents.
  2. Locate the clips or screws holding the glove compartment in place and carefully detach it.
  3. Find the cabin air filter housing, usually behind the glove compartment.
  4. Remove the old cabin air filter and replace it with a new one, ensuring it is oriented correctly.
• Parts Required: New cabin air filter.

3. Engine Compartment Inspection and Repair

• Sub-steps:
  1. Inspect all visible hoses and connections for leaks or signs of wear.
  2. If any hoses are leaking or damaged, replace them with OEM parts.
  3. Check for burnt wiring; if found, repair or replace the affected wiring harness.
• Parts Required: Replacement hoses, electrical connectors, or wiring as necessary.

4. Exhaust System Inspection and Repair

• Sub-steps:
  1. Inspect the exhaust system visually for any cracks, holes, or loose connections.
  2. If any leaks are found, replace the damaged components (e.g., gaskets, pipes).
  3. Ensure all exhaust clamps are tight and secure.
• Parts Required: Exhaust gaskets, pipes, or clamps as needed.