Rear drive unit and coolant hose faults (2025 cars)
A 2026 BMW service bulletin covers 2025 i5s that will not move when put in gear, with a loud noise from the rear drive unit, and a 2025 bulletin covers a coolant hose between the charging unit and the front motor that can leak at the motor end. Repairs are free under the 4-year, 50,000-mile warranty; after that a drive unit is a major dealer repair, and we found no reliable price.
How to check
Listen for whining or grinding from the rear, look for coolant under the front of the car and low-coolant warnings, and ask a BMW dealer to check the VIN for open service campaigns.
