Genuine Bentley Bentayga Active Stabilizer Bar (Rear)

Part Number: 4M0511023T

Maintain the legendary “Magic Carpet Ride” and cornering flat-out stability of your Bentley Bentayga with this Genuine OEM Active Roll Stabilization Bar. This is a highly sophisticated electromechanical component, not a standard hollow steel bar. It is the heart of the Bentley Dynamic Ride system, designed to counteract body roll in real-time.

Technical Specifications

• System Type: 48V Electromechanical Active Roll Stabilization (eARS).

• Position: Rear Axle.

• Compatibility: * Bentley Bentayga (W12, V8, and Diesel models equipped with Dynamic Ride).

  • Fits specific high-performance chassis platforms (Shared with Audi SQ7/SQ8 and Lamborghini Urus—please verify suffix ‘T’ for Bentley-specific tuning).

• Function: Uses an internal motor to twist the bar, applying counter-torque to keep the vehicle level during high-speed cornering while decoupling on straight roads for maximum comfort.

Signs of Failure in the Active Stabilizer System

Because this part is electromechanical, failures are usually indicated by electronics rather than just “clunks”:

• Chassis Warning Light: A yellow or red “Suspension Fault” or “Dynamic Ride Malfunction” on the digital instrument cluster.

• Leaning during Cornering: The vehicle feels “boaty” or tips excessively when turning.

• Harsh Ride Quality: The bar may fail in a “locked” position, making the rear suspension feel unusually stiff over bumps.

• 48V System Errors: Issues with the 48V electrical architecture can sometimes be traced back to a short within this stabilizer motor.

Why Genuine Bentley Parts Matter Here

The 4M0511023T is programmed with specific torque-delivery curves unique to the Bentayga’s weight and center of gravity. Installing an aftermarket version or an incorrectly coded unit can:

1. Disrupt the ESC (Electronic Stability Control): The car’s computer expects a specific response time from this bar to stabilize the vehicle.

2. Cause Electrical Interference: Inferior shielding on non-genuine motors can interfere with the vehicle’s sensitive 48V and CAN-bus networks.

Installation Requirement

Notice: Installation of this component requires a 48V system de-energization procedure for safety. After mechanical installation, the unit must be calibrated and coded to the vehicle’s chassis control module using specialized diagnostic tools.