BMW active steering malfunction fix

BMW’s Active Steering system is designed to adjust the steering ratio dynamically, improving maneuverability at low speeds and stability at high speeds. When a malfunction occurs, the system may default to a standard steering ratio, making the car harder to handle. Common error messages include "Active Steering Fault," "Steering Assistance Reduced," or similar warnings on the iDrive display.

Common Causes of Active Steering Malfunction

1. Battery or Voltage Issues – A weak or failing battery can cause system faults.
2. Steering Angle Sensor (SAS) Fault – If misaligned or faulty, it can disrupt active steering function.
3. Faulty Servotronic or Active Steering Motor – Mechanical or electronic failure in these components may trigger an error.
4. Communication Errors (CAN Bus Issues) – Disruptions in the vehicle’s communication network can cause system failures.
5. Software Glitches – Some malfunctions can be resolved with a software update.
6. Damage to Steering Rack or Module – Physical damage from impact or wear can lead to failure.

How to Fix BMW Active Steering Malfunction

1. Restart the Vehicle

• Sometimes, turning the car off and restarting it can temporarily clear the error.

2. BMW active steering malfunction fix: Check Battery Voltage

• A failing battery can cause intermittent issues. Use a multimeter to check the voltage:
  • 12.6V+ when the car is off (healthy battery)
  • 13.5V–14.8V when running (alternator working properly)
• If the voltage is low, replace or charge the battery.

3. Perform Steering Angle Sensor Reset

• If the steering wheel feels misaligned or the error appears after a battery change:
  1. Turn the steering wheel full left, then full right.
  2. Center the wheel and turn the ignition off and on.
  3. If the error persists, recalibrate using a BMW scanner tool (ISTA, INPA, or Autel).

4. Scan for Error Codes

• Use OBD-II diagnostic tools (e.g., INPA, ISTA+, or Autel) to check for stored faults in the Steering and DSC modules.
• Common fault codes:
  • 6050, 614A, 614E (Active Steering Module Faults)
  • DTC 613E (Steering Angle Sensor Issue)

5. Check Active Steering Module & Wiring

• Inspect fuses and relays related to Active Steering.
• Look for damaged or corroded wiring connections under the steering column.

6. Update or Reprogram Software

• If the issue is software-related, a dealer or independent BMW specialist can update or reprogram the Active Steering module.

7. Inspect the Steering Rack & Motor

• If mechanical failure is suspected, a BMW technician may need to replace the active steering motor or rack.

Final Thoughts

A BMW Active Steering Malfunction can be caused by anything from a weak battery to a failed steering rack. Start with basic resets and diagnostics before considering major repairs. Regular maintenance and timely software updates can help prevent future failures.