BMW E90 Steering Column Switch Unit 6857941 - Used Original Parts

Description

Product Title

BMW E90 Steering Column Switch Unit 6857941 - Used Original Parts

Diagnosis and Common Symptoms

From a workshop perspective, the Steering Column Switch Unit (SZL) is a frequent point of failure, primarily due to the integrated optical Steering Angle Sensor (LWS). A faulty SZL will compromise the Dynamic Stability Control (DSC) system, as it can no longer accurately read the driver's steering input.

Common On-Board Computer & Dashboard Errors:

• DSC and DTC Inactive / Malfunction
• Brake and Stability System Warnings (Often the "trifecta" of ABS, DSC, and yellow BRAKE lights)
• 4x4 System Malfunction (on xDrive models)
• Start-Off Assistance Inactive

Diagnostic Trouble Codes (DTCs) logged in the DSC module:

• 5EBA: Steering-angle sensor, plausibility
• 94B5 / 94B6: SZL: Steering Angle Sensor, internal fault
• D35A: DSC: Steering-angle sensor: angle invalid

Physical Symptoms:

• Turn signals fail to self-cancel after completing a turn.
• Cruise control becomes inoperative.
• Steering wheel-mounted buttons respond intermittently or not at all.

Introduction

The Steering Column Switch Unit (SZL) is the central command hub for your BMW's steering-related functions, critical for both driver controls and vehicle safety systems. This is a Genuine BMW part, carefully extracted from a donor vehicle to ensure 100% compatibility with the vehicle's complex electronic network. Each unit undergoes a rigorous bench test to verify the functionality of all stalks, buttons, and most importantly, the sensitive steering angle sensor, offering a reliable and cost-effective restoration of your vehicle's performance.

Product Details

• Brand: BMW

• Model Compatibility: E90, E91, E92, E93 (3-Series). May also fit E82, E84, E87, E88 models; verify part number.

• Part Name: Steering Column Switch Unit (SZL)

• Condition: Genuine Used (Tested Working)

• Notes: This unit houses the integrated Steering Angle Sensor (LWS). Post-installation, calibration of the new sensor is mandatory using diagnostic tools (such as ISTA, INPA, or equivalent). Depending on vehicle options (e.g., Rain Sensor, Active Cruise Control), VO coding may be required to ensure all features function correctly.

Frequently Asked Questions

Q: What symptoms indicate failure? A: The most common indicators are persistent DSC/ABS/4x4 warning lights on your dashboard, turn signals that do not automatically cancel, and an unresponsive cruise control system. Fault codes related to the steering angle sensor are a definitive sign.

Q: Does this require coding? A: Yes, at a minimum, it requires steering angle sensor calibration to reset the zero point. Full vehicle coding may be necessary if your car's options (like rain sensor or specific cruise control functions) differ from the donor vehicle's configuration.

Q: Is this original? A: Yes, this is a Genuine BMW component salvaged from a fully operational vehicle. We exclusively handle original parts to guarantee correct fitment, communication protocol, and long-term reliability.

Why Choose Us?

• Verified functionality
• Actual photos/videos provided
• 30-day exchange warranty
• Each unit's LIN-Bus communication and steering angle sensor data are verified with diagnostic software.

Shipping

Location: Kuala Lumpur, Malaysia Shipping: West Malaysia RM50 (Estimate) / East Malaysia RM80 (Estimate) Delivery: 1-2 working days Packaging: Secure anti-static packaging, heavy-duty shock absorption. (We send actual photos/videos of the unit and packaging before shipping)

Warranty and Return Policy

• 30-day exchange warranty from the date of receipt.
• Proof of professional installation by a qualified workshop is required for warranty claims.
• No returns if the item is opened, modified, tampered with, or damaged due to incorrect electrical wiring.
• Exchange only for confirmed internal electronic defects.

How to Order

1. WhatsApp us to confirm compatibility with your specific VIN.
2. Send your chassis number or a clear photo of your old unit label.
3. Confirm order details and stock availability.
4. Receive actual product photos and diagnostic test confirmation.
5. Make payment via bank transfer.
6. Item is shipped immediately with tracking details provided.

Contact Us

William – https://wa.me/60102992988 Lok – https://wa.me/60177720143

Price Notice

Price is estimated only. Actual price depends on current stock levels, specific part number revisions, and unit condition. Please WhatsApp us for a formal quote.

Compatible Models