How the system works
Rear-wheel steering adds controlled movement at the rear axle rather than relying solely on the front tyres for directional changes. ZF describes low-speed rear steering in the opposite direction to the front wheels, which can reduce the turning circle. At higher speeds, steering in the same direction may help stability during a lane change or other manoeuvre. The actual transition logic and angles depend on a specific vehicle's software and steering geometry. Supplier maximum-angle figures must not be assigned to every production car.
What it can and cannot do
Rear steering can be implemented with a centrally mounted actuator or actuators associated with individual wheel links. Electronic controllers coordinate requests with the rest of the chassis, and some systems communicate with stability control, braking or adaptive dampers. This is not four-wheel drive: moving the rear tyres' steering angle does not mean the rear axle propels the vehicle. It is also not identical to torque vectoring, which changes drive or brake torque between wheels.
What changes between vehicles
The benefit can be easier urban manoeuvring for a long-wheelbase vehicle and a more controlled response at speed, but it does not guarantee shorter stopping distances on every surface. The mechanical links, joints, actuators, sensors and software all require correct service. Replacement parts or rear alignment adjustments may involve special procedures. A visible rear wheel turning slightly at a stop does not identify the exact system generation or prove proper calibration.
Buying and ownership implications
For a second-hand car, verify that rear-wheel steering is factory installed in the exact trim and market, then check service and repair documentation. Unusual rear suspension behavior or warnings need professional inspection. Do not attempt to disable rear-steer electronics or fit standard-axle components by visual similarity. Electronic chassis systems are designed and validated as a coordinated assembly, not a collection of interchangeable generic upgrades.
Regional and model-year caveats
Between 2020 and 2026, various manufacturers offered rear-steer on selected cars, but the options changed by model year and jurisdiction. This architecture guide deliberately contains no unverified model fitment list. Buying decisions should be based on actual turning performance and the local manufacturer's repair support rather than a catalogue promise of universal agility or reliability.