Power Window Assembly

Power Window Regulator — Rebuild or Brand-New Replacement

Inside every Tesla Model S door is a compact power window regulator assembly that uses a DC motor and cable-driven pulley system to raise and lower the glass. The motor is commanded via LIN bus signals from the door control module and actuated by the window switches. These regulators are built for Tesla by outside suppliers, and the stock design has a known weak point that leads to premature failure.

Why these window regulators fail

• Under-designed stop/shock system — At the extreme travel limits, the regulator relies on a small, spring-loaded plastic bushing that acts as a shock absorber for the cable system.
• Aging plastic bushing — Over time, heat and repeated cycling cause this plastic part to crack or split, releasing cable tension.
• Loss of cable tension — Once the bushing fails, the cable no longer remains properly tensioned, and the regulator can no longer move the glass smoothly—or at all.
• Typical symptoms — Window stops part-way, drops crooked in the frame, or makes grinding/clicking sounds before failing completely.

What we do

Service & coverage

Both options are performed in-shop and include removal and reinstallation of the interior door panel, proper sealing, and glass alignment so the window tracks smoothly in the frame. We can also coordinate this service with other Model S repairs while the vehicle is in our facility.