2020–2022 Ford Explorer: Rear axle bolt breakage (clunk, loss of drive)

Symptom: A clunk from the rear when you accelerate or shift, grinding or vibration, and in the worst case a loss of drive, or the vehicle rolling while in Park unless the parking brake is set.

Likely causes

1. Broken bolt. Ford recalled 2020–2022 Explorers because the rear axle mounting bolt can fracture. Explorer ST Forum owners collected the failure reports.
2. The first fix was software. It sets the electric parking brake automatically in Park. Later recalls added hardware fixes and corrected repairs that weren't done properly.
3. Follow-on damage, such as to the differential cover, is checked under the later recall.

Cost

Free under the recalls.

DIY or shop?

Dealer only.

Useful steps

1. Look up your VIN now. Several recalls apply, and some vehicles were repaired incorrectly the first time.
2. Set the parking brake every time you park until it's fixed.
3. If you hear a new clunk from the rear, stop driving and have it inspected.

Vehicle focus: 2020–2022 Ford Explorer.

Safety / mechanic note

Losing drive, or a vehicle that rolls away, can cause injuries. Verify with a dealer and always use the parking brake.