Zafira B Steering Angle Sensor
A Zafira B steering angle sensor question usually starts with a warning light, a heavy or uneven steering feel, or a stability control message that appears and disappears. The sensor reports the position and rate of the steering wheel to modules that coordinate electronic stability control and electric power steering assistance. Interpreting its signals correctly matters because the value affects how the vehicle responds during cornering and corrective steering. A stored fault code is only a diagnostic starting point, not proof that the sensor itself has failed. Wiring, the clock spring, calibration loss, and steering column angle can all influence the reading, so the useful first step is distinguishing a sensor fault from a signal path or alignment issue before replacing parts.
Essential answer
The steering angle sensor in a Zafira B measures steering wheel rotation and converts that mechanical position into an electronic signal. The module that receives this data uses it to understand intended direction and the urgency of driver input. When the signal is missing, implausible, or out of calibration, the system may disable stability assistance or reduce steering support because it can no longer trust the driver-intent reference. The essential answer is therefore that the part is a reference transmitter for dynamic control, and diagnosis should begin by confirming whether the reported angle changes smoothly across the full range without dropouts.
A direct replacement should not be based only on a code such as a manufacturer-specific steering angle fault. The same symptom family can come from a weak battery during start-up, a disturbed sensor position after suspension work, or a damaged wiring connector at the column. Any repair decision should first separate a failed component from a lost calibration value or an intermittent connection. Because these vehicles integrate the sensor with steering column hardware and wheel alignment relationships, the correct next action is often a scan-tool plausibility check combined with a visual inspection of the steering shaft area and related connectors.
