Mercedes 7G-Tronic 722.9 TCM – Turbine Speed Sensor Repair
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 7G-Tronic 722.9 TCM – Turbine Speed Sensor Repair
This is a repair service for the 722.9 7G-Tronic Transmission Control Module (TCM) used across a wide range of Mercedes-Benz vehicles.
A common failure in these units involves the internal turbine speed sensors – Y3/8n1 (Turbine Speed Sensor) and Y3/8n2 (Internal Speed Sensor). Faults typically cause:
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Harsh or erratic shifting
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Transmission stuck in limp mode
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DTCs relating to speed sensor errors
We professionally replace both sensors as a matched pair to restore proper transmission performance and reliability.
Compatible with many Mercedes-Benz models, including:
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E-Class (W211, W212)
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C-Class (W204)
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ML / GLE-Class (W164, W166)
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CLS-Class (W219, W218)
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S-Class (W221)
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GL-Class (X164)
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And other models equipped with the 7G-Tronic 722.9 transmission
All repairs are fully tested before return and backed by a 12-month warranty.
Note: This is a repair service – your TCM must be sent in for repair.