Lexus models, including the LS sedan, RX crossover and GX SUV, are some of the least problematic air ride vehicles on the road. In fact, most Lexus customers do not realize that their vehicle is equipped with an air suspension until something breaks.
What makes most Lexus systems unique is the lack of a reservoir. The compressor provides air “on-demand.” Most systems will use four ride height sensors that measure the height and speed of the wheel displacement. The suspension control ECM will filter the ride height readings and other sensor data from accelerometers, and even data from the engine ECU, to determine which air spring intakes air or exhausts it. The suspension control ECU will also adjust the valving of the dampeners for the best possible ride.