BMW E46 Steering Angle Sensor with Switch 83774889- Used Original Parts

Diagnosis and Common Symptoms

From the workshop floor, a failing Steering Angle Sensor (LWS) on the E46 chassis presents a classic and unmistakable set of symptoms. The primary indicator is the illumination of the "trifecta" on the instrument cluster: the amber DSC (Dynamic Stability Control), ABS, and BRAKE warning lights. This indicates the DSC system has been deactivated due to receiving implausible or no data regarding the steering wheel's position and rate of turn.

A diagnostic scan will typically reveal fault codes stored in the DSC/ABS module, such as:

• 5E40: Steering Angle Sensor Plausibility
• 5E43: Steering Angle Sensor Internal Fault
• 5DF0 / 5DF1: DSC Hydraulic Unit Pump Motor Fault (Often triggered as a secondary fault)

Functionally, the vehicle will drive, but without the critical safety net of traction and stability control. This component is essential for the system to correctly interpret driver input and intervene during loss of traction.

Introduction

Restore your vehicle's critical DSC and ABS systems with a Genuine BMW component. This is not an aftermarket replica; it is an original Steering Angle Sensor assembly, carefully removed and bench-tested to ensure full electronic functionality. Each unit is verified to communicate correctly and is ready for installation, offering a reliable and cost-effective solution to the common E46 "trifecta" light issue. Trust in factory-engineered precision for a proper repair.

Product Details

• Brand: BMW
• Model Compatibility: BMW 3 Series (E46 Chassis)
• Part Name: Steering Angle Sensor (LWS) with Steering Column Switch Cluster
• Condition: Genuine Used (Tested Working)
• Notes: Part number 8 377 489. Post-installation, calibration of the sensor using appropriate diagnostic software is mandatory for correct system operation.