Description
Overview
High-quality Steering Angle Sensor suitable for Citroën C4 and C4 Picasso vehicles. This sensor measures the precise steering wheel position and relays critical data to stability and driver assistance systems. It is an essential component for accurate vehicle dynamics control and safe driving.
Who Is This For
Designed for professional auto technicians and informed DIY mechanics who need a reliable replacement part. Frequently searched by part numbers, this unit is compatible with common PSA references and is suitable when diagnosing steering, ABS or ESP-related faults.
Technical Information
- Manufacturer: Citroën
- Model: Citroën C4, C4 Picasso
- Product Codes: 0265005486, 9650236180, 4545H8
- Additional Numbers: 9662937380
Function and Importance
The steering angle sensor (SAS) detects the angular position and rate of turn of the steering wheel. Data from the SAS is used by electronic stability control (ESP), anti-lock braking system (ABS), traction control and various driver assistance features to maintain vehicle stability and improve safety.
Common Symptoms And Causes Of Failure
Typical signs of a failing steering angle sensor include ESP or ABS warning lights, unstable or unpredictable stability control interventions, incorrect steering-related fault codes and reduced effectiveness of driver assistance systems. Failures can result from electrical faults, connector corrosion, mechanical impact (accident), water ingress or internal wear.
Fitment And Replacement Guidance
The sensor is usually mounted on or near the steering column, often integrated with or positioned close to the clock spring assembly. Replacement steps generally include:
- Disconnect the vehicle battery and follow airbag safety procedures.
- Remove the steering wheel and airbag module to access the sensor.
- Unplug the electrical connector and remove the old sensor from its bracket.
- Install the new sensor, reconnect the wiring and reassemble the steering components.
Important: After installation the sensor must be calibrated/adapted using a compatible diagnostic tool (for PSA vehicles commonly DiagBox/Lexia or an OBD2 tool with SAS adaptation capability). Proper calibration is essential for correct system operation.
Maintenance And Service Life
The steering angle sensor is not a routine wear item with a fixed replacement interval; however, it should be inspected when related fault codes appear or after steering-system repairs or collisions. Prompt replacement and correct calibration restore full function of ESP, ABS and associated safety systems.
Why Choose This Part
This Steering Angle Sensor is specified for Citroën C4 and C4 Picasso models and lists the common PSA part references to simplify matching. It provides the accurate input required by modern vehicle control systems and is recommended for technicians and competent DIYers who can perform safe removal and diagnostic adaptation.
