See also:

Engine/Transmission/Drivetrain/Performance
The IS 250's 2.5-liter V6 engine delivers 204 horsepower at 6,400 RPM and 185 lb.-ft. of peak torque at 4,800 rpm. The Lexus IS 350's 3.5-liter V6 offers a more potent 306 horsepower at 6,400 RPM ...

If the electronic key does not operate properly
If communication between the electronic key and vehicle is interrupted or the electronic key cannot be used because the battery is depleted, smart access system with push-button start and wireless r ...

Features
While the RX 450h is reasonably priced to start at $42,110, adding options quickly ratchets up the sticker price. Items you might find standard on other cars in this class, like those heated and c ...