how do I fix fuel economy issues in my BMW 3 Series G20/G21 (2019-2024)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

2. Replace Air Filter

• Tools Required: Screwdriver, replacement air filter.
• Sub-steps:
  1. Locate the air filter housing.
  2. Open the housing by unscrewing the clips or screws.
  3. Remove the old air filter and clean the housing.
  4. Install the new air filter ensuring it fits snugly.
  5. Reassemble the housing and secure it.

3. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner, clean cloth.
• Sub-steps:
  1. Remove the fuel injector connectors.
  2. Use a fuel injector cleaner according to the product instructions.
  3. Reinstall connectors after cleaning.

4. Check Tire Pressure and Condition

• Tools Required: Tire pressure gauge, air compressor.
• Sub-steps:
  1. Remove valve caps from each tire.
  2. Measure tire pressure with a gauge.
  3. Inflate tires to the manufacturer's recommended pressure.
  4. Inspect tire tread for wear and replace if necessary.

5. Change Engine Oil

• Tools Required: Wrench set, oil filter wrench, oil catch pan, new oil filter, fresh engine oil.
• Sub-steps:
  1. Lift the vehicle using a jack and secure it with jack stands.
  2. Drain the old engine oil into the catch pan.
  3. Remove the old oil filter using the oil filter wrench.
  4. Install the new oil filter and tighten it according to specifications.
  5. Refill the engine with fresh oil through the oil filler cap.