Lexus has a long and proud history of technical innovation. The brand constantly explores new opportunities to raise levels of safety, performance, and comfort. Most importantly, Lexus focuses on driver rewards. It is in this spirit of progress that the company has introduced its first steer-by-wire system. This radical technology brings a completely new dimension to the luxury driving experience.
Making its debut in the new RZ electric luxury SUV, the Lexus steer-by-wire system offers a duality of rewards. It delivers the control and precision valued by the world’s top professional drivers. At the same time, it is smooth and easy to use. It generates a reassuring sense of constant connection with the road, building a deeper dialogue between the driver and their vehicle.
What is Steer-by-Wire Technology?
Unlike a conventional mechanical steering system, the Lexus steer-by-wire setup has no physical connection between the steering wheel and the front wheels. Instead, the driver’s steering inputs are communicated as electronic signals. These signals are relayed via a steering torque actuator to a steering control actuator located on the front axle.
This official technology is known as One Motion Grip. It replaces the traditional steering rack and column with a high-speed digital link. Because the response is electronic, it is incredibly quick and direct. This inspires a sense of confidence that mechanical systems often struggle to match.
Safety is, of course, a primary concern. Lexus has ensured that robust safeguards are in place. The system includes a backup supply and emergency processors that will intervene immediately to provide uninterrupted performance should the principal power supply experience any issues.
The One Motion Grip Steering Yoke
One of the most striking features of this new technology is the steering wheel itself. It is a compact, new-look design that lacks the traditional upper and lower curved sections. Visually, it resembles the controls found in a modern aircraft cockpit.
This is far more than just a design exercise. Because there is no mechanical link, Lexus engineers have been able to set the lock-to-lock turn angle at just 150 to 200 degrees. This effectively eliminates the need for hand-over-hand turns. The driver can move the car from full left lock to full right lock without ever removing their hands from the ten-to-two position.
The compact dimensions of this butterfly-style yoke have allowed the cockpit to be opened up. This provides a clearer, uninterrupted view of the road ahead and creates more space for the driver’s legs. This design further enhances the “Tazuna” cockpit concept. This philosophy prioritises the driver’s forward focus by organising controls and displays so they can be used with minimal movement of the hand or eye.
Steering That Adapts to Your Environment
One of the greatest advantages of removing the physical steering column is the ability to use a variable steering gear ratio. In a traditional car, the ratio is fixed. This means the steering always reacts the same way regardless of how fast you are going.
Lexus steer-by-wire changes the rules. The system automatically optimises performance according to vehicle speed:
- Low Speed: The steering operates at a lower ratio. This makes manoeuvring effortless when navigating a tight parking space or turning at a busy intersection.
- Medium Speed: On winding country roads, minimal inputs are required for nimble and exhilarating performance.
- High Speed: The ratio is automatically increased. This promotes stable vehicle behaviour and a calm, confident experience on the motorway.
Authentic Feedback Without the Noise
A common concern with electronic steering is that it might feel “numb” or disconnected. Lexus has solved this by using the Steering Control Actuator to sense forces generated by the road surface.
The system is intelligent enough to filter out unwanted vibrations. For example, harsh feedback from the brakes or sudden tyre movements on uneven surfaces are removed. However, the system still transmits authentic and accurate feedback to the driver. This ensures a natural sense of how the car is behaving without the fatigue caused by constant road chatter. With steer-by-wire, the wheels are also less likely to move contrary to the driver’s intention when driving on slopes or over ruts.
Integration with Battery Electric Power
This technology is perfectly suited to the next generation of Lexus electric vehicles. Steer-by-wire works in total harmony with the DIRECT4 electric all-wheel drive system. Together, they produce a rewarding synchronisation between the driver’s actions and the car’s behaviour.
Furthermore, steer-by-wire is a core technology for the development of future autonomous driving systems. By digitising the steering interface, Lexus is paving the way for cars that can transition seamlessly between manual driving pleasure and automated assistance.
Lexus steer-by-wire is available now, provided as standard on the new RZ 550e F Sport and F Sport Takumi models. It represents a bold step forward in automotive engineering, proving that by removing a mechanical link, you can actually create a stronger connection between car and driver.
