why is my BMW X3 G01 (2018-2024) jerking when I shift gears

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a level surface and set the parking brake.
• Disconnect the battery to prevent any electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:

  1. Locate the transmission dipstick (if applicable) or the fill plug.
  2. Remove the dipstick or fill plug and check fluid level.
  3. If low, add the specified transmission fluid (consult owner’s manual for fluid type).
  4. If the fluid is dark or burnt, proceed to replace the fluid and filter.
  5. Drain the transmission fluid by removing the drain plug or pan.
  6. Replace the transmission filter if applicable.
  7. Refill with new transmission fluid to the appropriate level.

• Tools Required:

  • Transmission fluid pump
  • Socket set
  • Torque wrench

3. Inspect and Replace Transmission Mount

• Sub-steps:

  1. Raise the vehicle using a jack and secure with jack stands.
  2. Locate the transmission mount and inspect for cracks or wear.
  3. Remove bolts securing the mount to the transmission and chassis.
  4. Replace the old mount with a new one, ensuring proper alignment.
  5. Torque the bolts to the manufacturer’s specifications.

• Tools Required:

  • Socket set
  • Torque wrench

4. Throttle Position Sensor (TPS) and Mass Airflow Sensor (MAF) Testing

• Sub-steps:

  1. Locate the TPS and MAF sensors.
  2. Use a multimeter to test sensor outputs according to specifications.
  3. If readings are out of tolerance, replace the faulty sensor.
  4. Reconnect all wiring and ensure connections are secure.

• Tools Required:

  • Multimeter