The new Lexus RZ

NEW RZ DEVELOPMENT GOALS: CHIEF ENGINEER SHINYA ITO

RZ Chief Engineer Shinya Ito says the aim was to enhance BEV performance and handling with three distinct goals: use electrification technologies to create an enjoyable driving experience, enhance the RZ’s usability, and create anticipation for what lies ahead for Lexus.

“We want to show that electric vehicles are not just about selling new cars, but also offering various experiential values through electrification technology,” Mr Ito said.

With Lexus the designated leader in electrification technology for the parent company, Mr Ito said it was the role of Lexus to deliver significant improvements in driving range, develop a vehicle platform to accommodate more batteries, and broaden the mobility experience through electrification.

DRIVING DYNAMICS

• New RZ engineered to deliver the rewarding, confident and exhilarating performance of the Lexus Driving Signature.
• Detailed suspension tuning and enhanced body rigidity increases responsiveness, stability and comfort.
• The evolution of the intelligent Lexus DIRECT4 all-wheel drive system.

DELIVERING THE LEXUS DRIVING SIGNATURE

All Lexus vehicles are tuned to deliver the Lexus Driving Signature: a unified driving experience in which the driver enjoys comfort, confidence and control at all times, with dynamic vehicle responses faithful to the driver’s input. With the new RZ, Lexus shows how exhilarating performance can be achieved with battery electric vehicle technology.

Structural rigidity is increased with improvements around the front radiator support, namely through increased plate thickness and strengthened joints. Meanwhile, the addition of a rear brace helps reduce localised torsional deformation. The additional stiffness measures support a clean and linear response to steering inputs.

EVOLUTION OF LEXUS DIRECT4

Central to the RZ’s improved response and driving dynamics is the revision to the Lexus DIRECT4 drive control, further enhancing the traction and stability performance of RZ all-wheel drive variants.

The intelligent system automatically controls the distribution of power delivery to the front and rear eAxles, according to driving conditions and driver input.

The range of torque distribution is extended over the previous RZ by increasing the output of the BEV system. From standstill and in straight-line acceleration front:rear power distribution is controlled between 60:40 to 0:100, suppressing pitching and producing a more direct acceleration feel. During cornering, the distribution ratio is optimised between 80:20 and 0:100, according to vehicle speed and steering angle, to match the driving conditions.

During turn-in, more power is directed to the front axle to achieve smooth entry. When exiting, torque distribution is in line with the load on each wheel, maintaining vehicle balance for smooth acceleration. The result is a rewarding feel when cornering and precise vehicle dynamic responses faithful to the Lexus Driving Signature.

When the driver selects Range mode to maximise efficiency, the front:rear balance is maintained at 50:50.

The adoption of Vehicle Dynamics Integrated Management (VDIM)¹ on F Sport contributes to a flatter, more comfortable ride; together with enhanced driving stability and dynamic vehicle responses in emergency swerving.

DEVELOPMENT AND TESTING AT SHIMOYAMA

Lexus continues to use the purpose-built facilities at its new Shimoyama base in Japan to test all aspects of the RZ’s performance. On the track is where product development teams work in close collaboration to improve driving feel.

In addition to human input, engineers use advanced software to fine-tune performance to ensure the Lexus Driving Signature is achieved.

A LEXUS FIRST: STEER-BY-WIRE SYSTEM DELIVERS A UNIQUE DRIVING EXPERIENCE

• First application of new Lexus technology. Offered exclusively on RZ 550e F Sport.
• No mechanical link between steering wheel and wheels – steering inputs are relayed by electric signals.
• Responsive, safe and controllable performance, adapting automatically to the driving conditions.
• New steering wheel shape provides comfortable, intuitive operation, increases the driver’s field of forward vision and opens up more space in a new-look cockpit.

The RZ is the first Lexus to adopt the new Lexus steer-by-wire system. Intuitive, easy and comfortable to use, it creates an even stronger connection between driver and vehicle. It also transforms the traditional cockpit layout with a new-shape steering wheel that opens up more space around the driver.

STEER-BY-WIRE OPERATION

The new system differs fundamentally from a conventional steering system in having no mechanical link between the steering wheel and front wheels. Instead, the driver’s steering inputs are relayed by electric signals from a torque actuator to a control actuator.

Performance is safe, confidence-inspiring and highly responsive, with steering inputs adjusting according to vehicle speed. This makes for easier manoeuvring at low speed, agile response on winding roads, and confidence-inspiring stability at high speed.

On a conventional system, the driver may need to make two or three full turns of the wheel to move from lock to lock. On the new Lexus system, less than one turn (a maximum of 200-degrees) is needed to move from centre to full left or right lock, almost eliminating hand-over-hand or crossed arm movements.

Thanks to the electric signals, the driver enjoys appropriate and rewarding steering feedback. Important feedback filters through without the unpleasant vibration effects of a mechanical connection. Safety is built-in, with a full redundancy system in which each component is duplicated and an extra back-up power supply in place.

On RZ models without SBW, the unit’s construction is more rigid to improve feedback. Measures are also taken to reduce weight and functional noise.

NEW-SHAPE STEERING WHEEL FOR SBW

The steer-by-wire system is intuitive, comfortable and easy for drivers to adapt using a new-shape steering wheel; which dispenses with the upper and lower sections of the traditional “ring” and has a flat bottom, with curved finger grips to the left and right.

This radical new design gives the driver a more open field of view and strengthens the dialogue with the car.

The smaller dimensions of the new steering wheel – 360 mm across and 197 mm high – increases knee room for easier entry and egress. The steering wheel is also heated.

The steering wheel switches are vertically arranged and include new combination switches for less frequently used light and wiper functions. This includes light control, fog light operation and auto wiper sensitivity adjustment.

COMPREHENSIVELY REVISED AND ENHANCED BEV SYSTEM

• All elements of the BEV powertrain revised for greater performance and efficiency.
• New high-capacity 77kWh lithium-ion battery pack.
• Battery water cooling and pre-conditioning optimise charging times in all conditions, including challenging low-temperature environments.
• Revised eAxles with reduced losses and higher output.

The RZ’s battery electric powertrain has undergone a complete revision, with a focus on enhancing performance, practicality and driving pleasure to take BEV performance to the next level.

The key changes include the introduction of a new high-capacity lithium-ion battery and revised eAxles with improved electric motor output and inverter efficiency, adding to a significant reduction in internal losses. There is also a new 22kW onboard charger.²

In combination, these elements are featured in a new RZ range with two different power output options for Australia.

NEW HIGH-CAPACITY BATTERY

A new, high-capacity lithium-ion battery pack is a key contributor to the enhanced performance of the new RZ. Capacity has increased from 71.4kWh to 77kWh.

The construction of the battery cells is revised and their number increased to enable higher output from the eAxles. This is achieved without changing the pack’s external dimensions, ensuring it remains located wholly beneath the vehicle floor.

The battery gains a new water-cooling system to help maximise output and suppress cell deterioration, even under high-load conditions: for example, rapid charging after repeated or lengthy fast acceleration, uphill driving, heavy trailer towing and off-road driving.

The cooling system’s controls are efficiently managed with the RZ’s air conditioning system so that refrigerant or radiator cooling sources are used, in line with the external temperature. The cooler is placed in close contact with the battery and cools from the bottom to achieve efficient, uniform performance.

Towing capacity for the RZ 500e and RZ 550e is rated to 1,500kg.³

REDUCED CHARGING TIMES

Charging performance is improved thanks to the introduction of the new battery pack and the adoption of a more powerful 22kW onboard charger² as standard, replacing the previous 11kW unit. This anticipates the wider availability of public fast-charging infrastructure.

To improve charging times in cold climates, the new RZ is equipped with a new battery pre-conditioning system. This may be used to bring the battery up to optimum temperature before charging starts. Lexus estimates a 10 to 80 per cent charge can be accomplished in 30 minutes using the pre-conditioning function, compared to 55 minutes without (at -10°C)². Confirmation for the Australian market will be closer to the vehicle’s introduction next year.

The battery pre-conditioning system may be operated manually, using a control in the multimedia system, or automatically when a charging location is set as a route waypoint or destination in the navigation system. A timer setting may also be used so that heating can scheduled for a specific journey.

The battery heater’s performance is further improved by adjusting the location of the coolant heater and heat exchanger, helping reduce charging times in cold weather.

ENHANCED EAXLE PERFORMANCE

Changes to the RZ’s eAxle reduce internal losses and deliver higher motor output with quieter performance.

Additionally, the unit’s compact proportions help optimise packaging, ensuring generous interior space. At the front, the eAxle’s shortened length provides better protection in a collision while the lower height of the rear unit allows for more load space and a flat floor. The eAxle’s better proportions helps RZ engineers ensure the battery can be fully accommodated beneath the vehicle floor.

Further improvements include a ball-type bearing, allowing for a more compact three-shaft gear module, which helps reduce internal losses. Surface polishing of the gear teeth also reduces energy losses while giving more precise and quieter operation.

A revised lubrication system on both front and rear eAxles dispenses with the need for a mechanical pump. Further efficiency is achieved with the inverter adopting silicon carbide (SiC) semiconductors to help deliver both higher output and improved efficiency.

Scrutiny is also paid to the electric motor construction. The rotor’s size and weight are reduced, while adjusting the magnet locations enables both high rpm and output to be achieved. Fine-tuning of the stator coil enhances torque and reduces losses and power consumption.

The comprehensive technical revisions to the BEV system deliver an increase in the new RZ’s driving range. The reduction of losses within the eAxle, the increase in the battery capacity and optimisation of the control systems make key contributions to the improved range capability.

LIFE ON BOARD: QUIETNESS AND COMFORT

• Additional sound insulation and soundproofing measures make all parts of the cabin even quieter than before.
• Cabin quality enhanced with a Lexus-first laser-cut Ultrasuede®⁶ graphics and ambient lighting with new Dynamic Shadow moving pattern effect.

QUIETER THAN EVER BEFORE

As a BEV, the RZ is a fundamentally quiet vehicle, but Lexus goes further to ensure the cabin is as well insulated as possible from noise and vibration to provide a calm, comfortable and cocooning environment.

Extra, detailed measures are applied in the new RZ to achieve exceptional quietness. As a result, not only is the sound pressure level reduced, but the texture and balance of the tone is also improved in both the front and rear cabin, and the load compartment.

The latest adoptions include a new floor silencer behind the rear seats and the use of a new high-damping adhesive in the floor to reduce vibrations. There is also a new resin cover under the front moulding and higher-performance soundproofing material in the trims, garnishes and back door.

The detailed scrutiny of all the interior elements produces a change to the tonneau cover, which has an additional soundproofing felt layer.

These are in addition to the RZ’s existing measures to combat noise and vibration, including an all-round bonnet seal, vibration-damping foam around the front and centre pillars and acoustic glass in the front and rear doors. Vibration from the powertrain is reduced with a new motor mount design with high damping characteristics.

LASER-PATTERNED UPHOLSTERY

Lexus has created the first interior trim to feature graphics applied by laser to Ultrasuede®⁶, an upholstery textile made from sustainable, 30 per cent plant-based material. The technique is used to produce a new luxury expression with a pattern of flowing contours on the door cards.

Ultrasuede®⁶ is featured on RZ 500e Sports Luxury and RZ 550e F Sport grades.

DYNAMIC SHADOW ILLUMINATION

Lexus has extended the function of the 14-colour ambient cabin lighting to combine light and shade in a dynamic shadow illumination effect. Three LED light sources are used to create overlapping lighting and dimming. This produces a relaxing effect with moving patterns playing across the door panels.

SUSPENSION

The suspension – front MacPherson struts and rear double wishbones – benefits from fine adjustment to the front and rear dampers and springs, promoting dynamic performance and achieving a good balance between handling stability and ride comfort. The front bushing is also optimised to obtain more direct steering response.

Other improvements include a weight-saving reshaping of the lower front suspension arm and new internal parts in the hub bearing – measures which help optimise driving efficiency. The steering gearbox mount is also modified for further rigidity and steering responsive.

BODY RIGIDITY

A high level of rigidity and connection throughout the entire body is key to achieving accurate vehicle responses faithful to the driver’s inputs. Development of the RZ ensured a very rigid structure, helped by the placement of the battery low down, within the wheelbase, and making the battery unit itself part of the vehicle’s frame.

Advanced construction techniques, including laser peening and laser welding technology, contributes to the rigidity, together with extensive use of high-strength adhesive and high-rigidity foam. Tower bracing and performance dampers further contribute to the car’s impressively tight and stable feel.

Lexus took the opportunity to refine the degree of rigidity with additional bracing between the lower rear body and the rear wheel housing. The strength and rigidity of the radiator support at the side is also increased, benefiting handling stability.

THE NEW RZ 550e F SPORT WITH MANUAL VIRTUAL GEAR SHIFTING

• Introduction of the RZ F Sport.
• RZ 550e F Sport is the performance flagship of the range.
• Maximum output of 300kW.
• Lexus-first Interactive Manual Drive virtual gear shifting.
• DIRECT4 all-wheel drive as standard.

The new RZ introduces Lexus F Sport performance and design to the range for the first time.

The RZ 550e F Sport with enhanced Lexus DIRECT4 intelligent all-wheel drive system is the flagship of the line-up, its battery electric powertrain delivering an exhilarating and authentically sporty driving experience. A maximum power output of 300 kW enables acceleration from rest to 100 km/h in just 4.4 seconds⁴ and a top speed of 180 km/h⁴. The expected driving range is up to 450 km⁵. Confirmation for the Australian market will be closer to the vehicle’s introduction next year.

INTERACTIVE MANUAL DRIVE – THE SENSATIONS OF MANUAL GEAR SHIFTING IN A BEV

The RZ 550e F Sport is the first Lexus to be equipped with new Interactive Manual Drive, a technology first that gives the driver the sensations and rewards of manual gear selection in a battery electric vehicle.

The driver can enjoy a deeper dialogue and connection with the car, controlling drive force by using paddle shift controls on the steering wheel to select virtual gears.

The experience is heightened with real-time feedback through the throttle, G forces, reproduced motor sounds and a tachometer display with a curving bar read-out to indicate the virtual rpm.

The system is engaged simply by pressing an “M mode” switch on the centre console. The operation may also be used in conjunction with drive mode selection. When Sport mode is selected, acceleration is more agile in response to pedal pressure than in Normal mode.

Drive force output has an eight-speed virtual gear set up, allowing swift and pleasing virtual shifting using the paddle controls. Virtual power source torque is calculated according to the driver’s pressure on the accelerator and the vehicle speed; this is then multiplied by the virtual gear that is selected.

A shift guide meter that combines information from the tacho and power meters helps the driver intuitively understand the vehicle’s state at any time, and optimise up and down shifts in line with accelerator use.

PERFORMANCE HANDLING

Specific measures are applied to ensure the F Sport’s extra power translates into rewarding handling and performance.

In addition to the steps taken to enhance the RZ’s body rigidity, the F Sport has additional bracing around the radiator support and an extra brace in the rear-end structure. The sides of the radiator support are also more rigid with the use of a thicker panel and additional welding points, creating a strong joint between the support and the upper member. These measures strengthen the body and suppress deformation, helping sharpen steering and chassis response.

The suspension is revised for sportier performance, with retuning of the shock absorber damping force and the spring rates.

F Sport also benefits from Lexus’ Vehicle Dynamics Integrated Management (VDIM)¹. This co-ordinates operation of the ABS, brake assist¹, vehicle stability control, traction control and other braking control functions so the driver can enjoy the car’s full handling potential.

EXTERIOR STYLING

The F Sport stands apart from other models in the RZ range with powerful exterior styling that express its performance profile; while also enhancing aero performance, stability and cooling.

The functional features include air ducts in the lower front bumper that direct cooling air towards the brake callipers. The bumper moulding gains a fin-shape section, which directs air flow down the side of the vehicle, benefiting stability and steering response.

At the rear, the F Sport gains an additional spoiler along the bottom edge of the back window, a dedicated rear diffuser design and pontoon shapes in the bumper. These combine to help generate a rewarding feel of the car being firmly in contact with the ground, stable handling and prompt steering responses.

The F Sport rides on 20-inch aero wheels with an alloy frame and a resin cover. The lightweight construction is also aerodynamically efficient, helping maximise the car’s power efficiency. Striking blue-finished F Sport brake callipers are visible through the wheel spokes.

Colour options for F Sport will include a new Neutrino Grey⁷, in both bi-tone and monotone finishes.

INTERIOR FEATURES

The F Sport cabin is finished in black and dark grey, designed to evoke a sporty feel and quiet strength. The Ultrasuede^®6 upholstery has bright blue contrast quilt stitching, the signature colour of Lexus Electrified.

The F Sport front seats are made using an integrated foaming technique which creates a more solid bond between the upholstery and frame, giving superior body holding performance. Both seats have eight-way power adjustment and lumbar support.

F Sport detailing includes stainless steel tread plates, steering wheel badging and aluminium sports pedals and footrest. The laser-processed pattern on the Ultrasuede®6 door cards has a geometric design, contrasting with the flowing contours on other RZ models. The trim finish is also specific to the model, a film with a micro-geometric pattern.

RZ 500e LUXURY AND SPORTS LUXURY, EXCLUSIVELY WITH ALL-WHEEL-DRIVE

Opening the new RZ range is the RZ 500e Luxury with DIRECT4 intelligent all-wheel drive system, the numerically higher 500e prefix reflecting the power gain from 230kW to 280kW.

As the nomenclature suggests, the RZ 500e Luxury is highly specified with a comprehensive list of standard equipment and comfort features, including: 20-inch alloy wheels, leather accented NuLux^®8 trim for seats, steering wheel and door trim, rear privacy glass, auto dimming rearview mirror, eight-way power adjusted driver and passenger seats and power adjustable steering wheel.

The RZ 500e Sports Luxury adds further refinement with ventilated front seats, radiant heater (front), heated steering wheel, Ultrasuede®⁶ seat trim, Intelligent Park Assist¹ and black dimming panoramic roof to name but a few of the many additional enhancements.

The panoramic roof is made from a new blue glass with a dark-dimming quality. This provides greater shading than the previous roof when dimmed; and clear, sharp view out when switched to transparent.

All RZ grades come standard with the full suite of advanced Lexus Safety System+ active safety and driver assistance systems, including Pre-Collision System (PCS)¹, Dynamic Radar Cruise Control (DRCC)¹, Lane Trace Assist (LTA)¹, Blind Spot Monitoring (BSM)¹ and Panoramic View Monitor (PVM)¹.

Final specification and pricing will be confirmed closer to the new RZ’s Australian introduction in the first half of 2026.

NAVIGATION WITH UPGRADED BEV ROUTE PLANNING

The Lexus RZ gains more sophisticated navigation capabilities that combine route planning with monitoring of the state of charge of the car’s battery.

When the driver programs a journey, routes are planned with required stops for charging, with charging locations clearly shown as waypoints with a flash icon. The system can also show alternative charging locations, with revised arrival time.

The route planning is dynamic, so if the system detects charging is required, it will alert the driver with a “range too low” message on the map display and provide a re-routing option, with a new charging location included.

NEW RZ SPECIFICATIONS⁴