Tesla Large Drive Unit – repair and common problems

Electric drives are no longer a black box. During Auto Prof, DTS Lopik will demonstrate how the Tesla Large Drive Unit (LDU) is repaired in practice — technically sound, reproducible and cost-efficient.

The LDU, used in older Tesla Model S and Model X variants, among others, combines an electric motor, reduction gearbox and inverter in a single unit. In practice, we see recurring problems such as bearing wear in the reduction gearbox, internal coolant leakage towards the inverter and failing rotor seals. Complaints range from whining noises to malfunctions and emergency operation.

At DTS Lopik, the drive unit is completely dismantled, technically assessed and rebuilt according to fixed procedures. Bearings and seals are replaced, cooling circuits are repaired and the unit is rebuilt while retaining functionality and cooling. No quick fixes, but structural solutions.

At the trade fair, we share practical experience:
– Which symptoms indicate LDU problems
– What can and cannot be repaired
– How to recognise damage before total failure
– And why timely diagnosis makes the difference between overhaul and complete replacement

For independent workshops, this offers concrete tools: more technical control over EV drives and realistic repair options beyond complete unit replacement.