Lamborghini Huracan LP610 RHD steering gear 4S2.423.072F

Part Number: 4S2.423.072F (Successor: 4S2.423.072G / 4S2.423.072M) Configuration: Right-Hand Drive (RHD) System Type: Electromechanical Power Steering (EPS)

The 4S2.423.072F is the core electromechanical power steering rack for the Lamborghini Huracán LP610-4. This specific part number is designed for RHD markets (UK, Australia, Japan). Unlike traditional hydraulic systems, this EPS unit utilizes a brushless electric motor to provide assistance, which allows for deeper integration with the car’s ANIMA (Adaptive Network Intelligence Management) drive modes.

Technical Specifications

• Compatibility: * Lamborghini Huracán LP610-4 (Coupe/Spyder): 2014–2019

  • Lamborghini Huracán LP580-2 (RWD): 2016–2019 (Verify sub-variant compatibility)

• Steering Ratio: Variable ratio (designed to be more sensitive at low speeds and stable at high speeds).

• Communication: FlexRay vehicle bus system.

• Weights & Balance: Engineered to work with the Huracán’s hybrid carbon fiber and aluminum chassis to minimize front-end mass.

Key Performance Features

• Speed-Sensitive Assistance: The steering weight dynamically increases as the vehicle reaches triple-digit speeds, ensuring high-speed stability. Conversely, it provides maximum assistance at parking speeds for effortless maneuvering.

• ANIMA Integration: * STRADA: Maximum comfort and ease of use.

  • SPORT: Increased feedback and a heavier, more mechanical feel.

  • CORSA: Minimized assistance for maximum road feel and precision during track use.

• Maintenance-Free: Being a purely electromechanical system, it eliminates the need for hydraulic pumps, hoses, and fluid reservoirs, reducing both weight and the risk of leaks.

• LDS (Optional) Compatibility: This rack is the “Standard” EPS unit. If your vehicle is equipped with Lamborghini Dynamic Steering (LDS), you typically require the 4S2.423.072S variant, which includes an additional actuator to vary the steering ratio physically.

Technical Installation & Cataloging Notes

1. FlexRay Startup: The rack acts as a node on the high-speed FlexRay network. After installation, it must be initialized using the Lamborghini LARA or Audi ODIS diagnostic system. The car will not “see” the rack until it is registered to the central gateway.

2. Zero-Point Calibration: The steering angle sensor integrated into the rack must be calibrated to the center point. If this is not done, the ESC (Electronic Stability Control) and LDVI systems will throw a fault and may disable the AWD system.

3. Hardware Note: The mounting bolts for the rack are specialized high-tensile bolts (Part No. N91153101). They are one-time use stretch bolts and must be replaced and torqued to factory specifications to ensure the rack does not shift under the extreme lateral loads of a mid-engine supercar.

4. Tie-Rod Ends: When purchasing a used unit, inspect the ball joints on the tie-rod ends (4S0423812B). Given the Huracán’s performance, even minor play in these joints will negatively impact high-speed handling.