01AUTOMOTIVE REPAIR & SPECIALITY TOOLS
Precision for the W221 S-Class
The heart of a smooth automatic transmission lies in its ability to read speed and load with absolute accuracy. This module sits quietly within the drivetrain, translating mechanical motion into digital intelligence that keeps every gear change seamless.
Designed for the Mercedes Benz W221 S-class, this sensor replaces worn units to restore the car’s original responsiveness. It suits owners who value the effortless glide of their luxury sedan and want to maintain factory-level performance without complex diagnostics.
02COMPATIBILITY
Tailored for the S-Class lineup
This component is engineered specifically for the Mercedes Benz W221 series, covering the S300, S350, S500, S550 and S600 variants. It aligns with the specific electrical and physical requirements of these vehicles, ensuring the transmission control module communicates correctly with the rest of the powertrain system.
04INSTALLATION
Straightforward fitting process
Replacing this sensor does not demand an array of specialised tools, making it accessible for confident DIY mechanics or professional workshops alike. The process involves locating the unit within the transmission assembly and securing it in place, restoring the signal flow between the gearbox and the computer.
PACKAGING
Compact and lightweight carton
Arriving in a small 11 x 22 x 33 cm box, the package weighs just 0.1 kg, indicating the sensor’s efficient design. While handling may leave traces of lubricant on the surface, this is normal for stored automotive parts and does not affect the functional integrity of the electronic components inside.
AT A GLANCE
The key points
- Compatible with Mercedes Benz W221 S300 to S600 models
- Matches part numbers Y3/8n1, Y3/8n2 and Y3/8n3
- Black housing designed for easy installation
- Lightweight unit weighing 0.1 kg in packaging
- Durable construction for long service life
Highlights
- [Installation]
- Searching related installation video on the internet will be recommended and always wear eye protection and start with installation tools
- [Note]
- Our products are stored in warehouses, and there will be collisions during handling or transportation (most products need to be kept lubricated, it is normal to have lubricants, they are not second-hand products). But please rest assured that it will not affect the use.
About this product
Powerful Performance] This 722.9 TCM TCU control module sensor has good performance and reliable.
[Easy to Install] This durable 722.9 speed sensor is easy to install, no complicated tools required.
[Compatibility] This high quality 722.9 module sensor is Compatible with Mercedes Benz W221 S300, S350, S500, S550, S600, etc. Please refer to the details page for the specific year and model. Please check if your car model is compatible before placing an order.
[High Quality] This 722.9 module sensor is made of high-quality material, first-class quality, durable, long service life.
[Perfect Fit] This 722.9 TCM TCU control module sensor has the manufacturer part numbers Y3/8n3, Y3/8n2, Y3/8n1 and meets the standards, which is suitable for repair and replacement.
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