Delphi Vehicle Speed Sensor SS12421

Delphi SS12421 is a standard replacement vehicle speed sensor built for accurate speed signal output and OE-style fitment. It is engineered and validated to OE standards, with calibrated performance that supports reliable readings in everyday driving conditions.

Key Features

• Vehicle speed sensor for electrical and body system repair
• Standard replacement grade
• 1 square male connector
• 2 male terminals with pin-style terminal type
• Wiring harness not included
• Package contains one vehicle speed sensor

Application Details

Compatible with 2011-2019 Ford Fiesta and 2012-2018 Ford Focus. This Delphi SS12421 sensor is a direct-fit service part for vehicles that need a replacement speed signal sensor in the transmission or drivetrain speed-sensing circuit, depending on application.

This part cross-references Standard Ignition SC506 for the same application.

What It Helps Address

• Inaccurate or erratic vehicle speed readings
• Speedometer operation concerns
• Transmission shift issues related to vehicle speed input
• Diagnostic trouble codes tied to speed sensor performance
• Intermittent signal loss from a worn sensor

Installation Notes

Verify connector shape, terminal count, and OE part number before installation. Delphi SS12421 uses a square 1-connector design with 2 male terminals and no wiring harness included, so reuse of the existing harness is required. Confirm fitment against the vehicle’s year and model before service, especially on Ford Fiesta and Ford Focus applications.

Quality Assurance

Delphi validates its sensors to OE standards and calibrates them for accurate readings. The brand’s sensor portfolio is developed with OE-focused testing methods to support consistent replacement performance and reduce repeat repairs.