The front drive axles on the Model S and X can cause excessive vibration when the undercarriage is set to a higher ground clearance. The issue causes noise, vibration, and harshness, but does not affect steering, braking, or acceleration.
If the problem is detected, according to TESLA Service Bulletin SB-21-39-001 (link) from April 27, 2026, both front drive axles must be replaced with updated components, and if necessary, the engine mount and axle seal at the front drive unit also need to be replaced.
OVERVIEW OF THE 8 CROSS-REFERENCED TELSA MODEL S AND MODEL X
| Triscan # | TESLA | OE | OE | OE | |
| 8540 81505 | MODEL S | 1030616-00-A | 1030616-00-B | 1030616-00-C | |
| 8540 81506 | MODEL X | 1027115-00-A | 1027115-00-B | 1027115-00-C | |
| 8540 81514 | MODEL S / MODEL X | 1027119-00-B | 1420119-00-B | ||
| 8540 81515 | MODEL S / MODEL X | 1027113-00-B | 1420113-00-B | ||
| 8540 81516 | MODEL S | 1138042-00-B | 1626638-00-A | ||
| 8540 81517 | MODEL S | 1626636-00-A | 1626637-00-A | 1138040-00-B | |
| 8540 81518 | MODEL X | 1553109-00-B |
At Triscan, you will find all 8 drive axles in our large range of Triscan EV parts, which includes more than 7,400 references to:
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