Under guidance from VDIM, such precise brake control at individual wheels helps allow more optimized operation of the vehicle's dynamic handling systems that employ the brakes, including Anti-lock Braking System (ABS), Brake Assist, Vehicle Stability Control (VSC) and Traction Control (TRAC). VDIM also interfaces with the electronic-throttle control system, allowing it to modify vehicle power when needed, and a new Electric Power Steering (EPS) system to help optimize steering assist for individual situations.

EPS uses a DC motor and gear-reduction system built into the steering gear housing to provide steering assist. This compact unit contributes to fuel economy by eliminating the traditional power-steering pump and by providing computer-controlled assist only when called for by the driver. EPS also allows a more precise and timely control of steering assist than conventional engine-driven hydraulic systems.

VDIM continuously calculates vehicle motion based on signals from a yaw rate and deceleration sensor, speed sensor and steering sensor. Using these inputs, VDIM controls all of the vehicle's dynamic handling systems and can employ them collectively and seamlessly, which can allow it to quickly detect the onset of a loss of traction in turns and correct it. The ability to operate proactively means that corrections to vehicle handling are typically faster, more accurate and subtler than traditional systems, making VDIM feel smoother and essentially transparent to the driver.


Comprehensive Safety Systems

Lexus RX 400h features the same passive-safety protection for occupants as the RX 350 model. A high-strength cabin design and comprehensive Supplemental Restraint System (SRS) are designed to help provide a high level of crash-energy management for the occupants. SRS includes advanced front airbags for the driver and passenger, a knee airbag for the driver and front-seat-mounted side airbags designed to help manage impact forces to the torso, abdomen and pelvis. The front-airbag technology takes into account several factors, such as crash severity, front passenger weight and driver-seat position on the seat track.

Side-curtain airbags are designed to help offer additional crash energy management for the front- and rear-seat occupants. A roll sensor signals the side- curtain airbags to inflate if a predetermined threshold of vehicle tip-up is detected.

Visibility-enhancing technologies enhance safety in the RX 400h. The front side windows feature a water-repellant surface that helps to bead rainwater.


Lexus Luxury and Impressive Utility

Lexus RX 400h does not sacrifice space, comfort or versatility to deliver the benefits of hybrid technology. The rear seatbacks feature a versatile 40/20/40-split design, and the seats offer both sliding and reclining adjustments. The approximately 38-cubic-foot rear-cargo capacity expands to nearly 85 cubic feet with the rear seatbacks folded down. An automatic retracting tonneau cover adds a measure of security and convenience to the cargo area.

Lexus' craftsmanship and renowned attention to detail provide true luxury by design. Standard features include dual-zone automatic climate control and 10-way power front seats with memory.

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