9G Tronic 725.0 TCM - Range Y3/8s4 Park pawl postion sensor faulty
From January 1st, 2026, we will be strictly Trade Only for New Zealand Info here
Price Exclusive of GST
Our minimum assessment fee is $150 + GST (Excluding Headlights) this just covers the time to check the unit over. If you go ahead with the repair, we’ll put this towards the total cost. Our full terms of trade is the link can be found here
International Customers:
When sending a unit from overseas, please declare it as “Repair and Return” with a low customs value (around $100 USD) to avoid unnecessary import fees. - All Repair Prices are quoted in NZD
Mercedes-Benz 9G-Tronic (725.0) Transmission Control Module Repair Service
**Specifically, the range sensor issue not the pressure sensor fualt **
Fast, Accurate, Trade-Focused Repairs
We specialise in diagnosing and repairing the 9G-Tronic Transmission Control Module (TCM), also known as the 725.0 TCM, fitted to a wide range of late-model Mercedes-Benz vehicles. These units are prone to a number of sensor and internal electronics failures which can leave a vehicle in limp mode, unable to shift correctly, or completely inoperative.
Our in-house test bench allows us to fully simulate vehicle conditions — checking every sensor, solenoid driver, and communication line without the need to reinstall the unit in a transmission. This ensures your repair is fast, accurate, and proven before it leaves our workshop.
Common Problems We Repair
No gear engagement – stuck in Park or Limp mode.
Harsh or erratic shifting – rough gear changes, hesitation, or slipping.
Loss of communication – scanner unable to connect to the TCM.
Park position sensor failure – incorrect gear position display or “P” not detected.
17090, P0706 – Transmission Range Sensor (F125)
17101, P0717 – Transmission Input Speed Sensor (G182): No Signal
17105, P0721 – Transmission Output Speed Sensor (G195): Implausible Signal
17106, P0722 – Transmission Output Speed Sensor G195 no signal
17137, P0753 – Shift Solenoid 1 (N88): Circuit Failure
18201, P1793 – Transmission Output Speed Sensor 2 (G196)
18226, P1818 – Pressure Control Valve 2 N216