BMW E90 Steering Angle Sensor 912250904 - Used Original Parts

Diagnosis and Common Symptoms

From a workshop perspective, a faulty steering angle sensor (part of the SZL or Steering Column Switch Cluster) on the E90 chassis presents a clear set of electronic and dynamic symptoms. The primary indicators are the illumination of the DSC/DTC, ABS, and BRAKE warning lights on the instrument cluster, often in amber. On xDrive models, the 4x4 warning light will also activate.

A diagnostic scan will typically reveal fault codes stored in the DSC module, such as 5EBA (Steering Angle Sensor Plausibility), or other SZL-related communication faults. Functionally, you will experience a complete loss of stability and traction control. Other common symptoms include turn signals that fail to self-cancel after completing a turn and, on vehicles equipped with Active Steering, a noticeably heavier or inconsistent steering feel as the system defaults to a safe mode.

Introduction

At M.S. Motor, we handle these SZL failures regularly. Instead of opting for a costly new unit, we offer this Genuine Used BMW Steering Angle Sensor as a reliable, workshop-approved alternative. Each sensor is meticulously salvaged and subjected to a full diagnostic bench test to verify its data stream accuracy and signal integrity. This ensures you receive a fully operational component, ready for installation and calibration to restore your vehicle's critical safety systems.

Product Details

• Brand: BMW
• Model Compatibility: BMW 3-Series (E90, E91, E92, E93). May fit other models; verify part number.
• Part Name: Steering Angle Sensor / Steering Column Switch Cluster (SZL)
• Part Number: 9 122 509 04
• Condition: Genuine Used (Tested Working)
• Notes: This unit is the optical sensor integrated into the steering column switchgear. Correct installation and steering angle calibration via diagnostic tools (ISTA, INPA, etc.) are mandatory for proper DSC functionality.