FERRARI PUROSANGUE F175 Steering ACTUATOR Left Steering 950508

the part number 950508 identifies the Left Rear Steering Actuator for the Ferrari Purosangue (F175).

This component is a critical part of the 4WS (Four-Wheel Steering) system, which the Purosangue inherited and evolved from the 812 Competizione. It allows the rear wheels to steer independently, significantly improving the agility of this large-format vehicle.

1. Technical Identification

• Component: Left Rear Wheel Steering Actuator (Electric).

• System: Virtual Short Wheelbase 2.0 / 4WS.

• Function: This is an electromechanical actuator that adjusts the toe-angle of the rear left wheel. At low speeds, it steers in the opposite direction of the front wheels to reduce the turning circle; at high speeds, it steers in the same direction to increase stability.

• Independent Control: Unlike older systems, the Purosangue’s left (950508) and right actuators operate independently, allowing the car to manage yaw with extreme precision.

2. 2026 Market Pricing (Estimated USD)

Because this is a high-precision electronic component exposed to road grime and vibration, it is a high-cost replacement item.

3. Installation & Calibration

Replacing a rear steering actuator is not a “bolt-on and drive” procedure:

• Mechanical Alignment: Once the 950508 is physically installed, a full four-wheel laser alignment is required to set the mechanical “zero” position.

• Software Pairing: The actuator must be “flashed” and calibrated using the Ferrari DEIS diagnostic tool. The system performs a self-test sweep to verify the maximum steering angle and ensure it perfectly mirrors the logic of the right-side actuator.

• Chassis Integration: The 4WS system is deeply integrated with the Side Slip Control (SSC) 8.0. If the actuator is not perfectly calibrated, the car may disable traction control and E-Diff functions for safety.