why is my BMW X5 G05 (2019-2024) leaking transmission fluid?

Solution

1. Preparation

• Gather Tools: OBD-II scanner, socket set, torque wrench, fluid catch pan, rags, and safety goggles.
• Safety Warning: Ensure the vehicle is on a level surface and use wheel chocks. Disconnect the battery before working on electrical components.

2. Identify and Repair the Leak Source

• 2.1 Inspect and Replace Transmission Pan Gasket:

  • Remove any undercarriage covers if applicable.
  • Drain the transmission fluid into the fluid catch pan.
  • Unbolt the transmission pan using a socket set and carefully lower it.
  • Remove the old gasket material from both the pan and the transmission.
  • Install the new gasket, ensuring it is correctly seated.
  • Reattach the transmission pan and tighten bolts to the manufacturer's specified torque.

• 2.2 Inspect and Replace Damaged Cooler Lines:

  • Trace the cooler lines from the transmission to the radiator.
  • Remove any mounting clips or brackets holding the lines in place.
  • Disconnect the lines from the fittings and replace with new lines if found damaged.
  • Reattach the lines and secure them with clips or brackets.

• 2.3 Replace Seals if Necessary:

  • If leaks are found at the input or output shaft, remove the driveshaft or components to access the seals.
  • Remove the old seals with a seal puller and clean the sealing surfaces.
  • Install new seals carefully to avoid damage during installation.

3. Refill Transmission Fluid

• Use the appropriate transmission fluid as per the manufacturer's specifications.
• Refill the transmission fluid through the dipstick tube or designated fill port until the correct level is reached.