For Mercedes E350 E500 E550 722.9 TCU Transmission Control Module Sensor Y3/8s1

Transmission Control Module Sensor for Mercedes

This conductor plate speed sensor replaces the original Y3/8s1 unit in the 722.9 transmission control module for Mercedes models, restoring proper gear signal readings.

Overview

This transmission control module sensor is a direct replacement for the Y3/8s1 speed sensor found in the 722.9 TCU. The sensor reads internal shaft speed and sends that signal to the control module so the transmission shifts correctly. It is made for owners and technicians servicing Mercedes E350, E500 and E550 vehicles that run the 722.9 gearbox.

Built For Performance

• Direct replacement for the Y3/8s1 sensor position in the 722.9 TCU
• Restores gear speed signal to the transmission control module
• Helps eliminate harsh shifting and fault codes linked to a failed sensor
• Designed to fit within the conductor plate assembly
• Simple drop-in service part for transmission repair work

Fits These Machines

• for Mercedes E350 with 722.9 transmission
• for Mercedes E500 with 722.9 transmission
• for Mercedes E550 with 722.9 transmission

On-The-Job Use

• Transmission service and conductor plate repair
• Fixing shift quality issues traced to a faulty speed sensor
• Clearing transmission fault codes tied to Y3/8s1
• Shop or DIY 722.9 gearbox maintenance

Specs At A Glance

Good To Know

Q: Is this an original Mercedes part? A: No, this is an aftermarket replacement sensor made to fit the 722.9 transmission control module. It is not an original brand product.

Q: Do I need to remove the conductor plate to install it? A: The Y3/8s1 sensor sits within the conductor plate assembly, so access usually requires removing the plate. Confirm the procedure for your specific model before starting.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.