Standard Ignition SC555 Automatic Transmission Input Shaft Speed Sensor

Automatic Transmission Input Shaft Speed Sensor

Standard Ignition SC555 is an automatic transmission input shaft speed sensor for select BMW applications. It uses a bolt-mount design with a rectangular male connector and included wiring harness for a direct replacement on the transmission.

Key Features

• Automatic transmission input shaft speed sensor for transmission speed signal monitoring
• Bolt mount installation with 2 mounting holes
• Rectangular 1-connector design with male terminals and 3 blade terminals
• Black finish with plug-in connector type
• Wiring harness included for service replacement
• New sensor construction from Standard Ignition

Detailed Description

Standard Ignition SC555 is built for vehicles that rely on accurate input shaft speed data for transmission control. This sensor mounts on the transmission and uses a 3-wire, male-terminal electrical connection to communicate speed information to the control system. It is a direct-fit service part for BMW 128i, BMW 328i, BMW 328i xDrive, BMW 328xi, and BMW X3 applications listed below. If you are replacing a failing transmission speed sensor on a BMW 328i or BMW X3, SC555 provides the correct connector style and mounting layout for the application.

This part cross-references Standard Ignition SC555 for the same application.

Vehicle Fitment

• Fits 2008-2013 BMW 128i, N/A
• Fits 2007-2013 BMW 328i, N/A
• Fits 2009-2013 BMW 328i xDrive, N/A
• Fits 2007-2010 BMW X3, N/A
• Fits 2007-2008 BMW 328xi, N/A

Common Issues This Sensor Can Address

• Transmission speed signal loss or erratic input shaft speed readings
• Illuminated transmission or check engine warning lights related to sensor faults
• Harsh, delayed, or inconsistent shifting caused by incorrect speed data
• Diagnostic trouble codes tied to input shaft speed sensor performance
• Transmission control concerns after sensor connector or wiring damage

Installation Notes and Tips

Install SC555 on the transmission using the bolt-mount points and verify the connector locks fully into place. Inspect the mating harness, terminals, and sealing surfaces before installation, and confirm the sensor location matches the original unit on the vehicle. Because the wiring harness is included, compare the connector shape and terminal layout before final assembly.

Quality Assurance

Standard Ignition supplies this sensor as a new replacement part for transmission service applications. Verify fitment against the listed BMW model and year before installation.