Speed Sensor Set — Mercedes-Benz 722.9 7G-Tronic Automatic Transmission | Y3/8n1 / Y3/82
Fix Gear Selection Faults on Your Mercedes 7G-Tronic — Replace Both Speed Sensors.
The Mercedes 722.9 7G-Tronic 7-speed automatic transmission uses two speed sensors to monitor input and output shaft speeds. When either sensor fails, the TCU loses speed data — causing gear selection faults, harsh shifts, limp mode, and transmission warning lights. This set includes both sensors for a complete service.
What's Included
- Speed sensor Y3/8n1 (input shaft sensor)
- Speed sensor Y3/82 (output shaft sensor)
Why Replace Both
Both sensors experience the same operating environment and wear rate. Replacing both when one fails prevents a repeat repair and ensures the full transmission speed sensing system is renewed.
Vehicle Compatibility
All Mercedes-Benz models with 722.9 7G-Tronic 7-speed automatic transmission (A0335457332, A0034460310, A 000 270 17 00, A 000 270 26 00, A0002701700, A0002702600).
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