Air Suspension
A type of suspension powered by an electric or engine-driven air pump or compressor, which inflates rubber bellows to support vehicle weight.
Air suspension replaces traditional steel coil or leaf springs with flexible, pressurized rubber airbags (bellows). An electric air compressor, controlled by an electronic module, pumps air into or vents air out of these bellows to adjust the vehicle's ride height and stiffness based on passenger weight, cargo loads, or driving speed.
This system provides an exceptionally smooth "floating" ride quality and offers automatic load leveling. For example, if a heavy trailer is attached to a truck, the air suspension automatically pumps more air into the rear bags to keep the vehicle level. Some SUVs and luxury vehicles also allow the driver to raise the suspension for off-road clearance or lower it for easier passenger entry and better aerodynamics at highway speeds.
The most common failure point in air suspension systems is air leaks. Rubber bags dry rot and crack over time, forcing the air compressor to run continuously to maintain pressure. This eventually burns out the compressor motor. Symptoms include a sagging stance when parked, a noisy compressor, or a harsh ride. Replacing dry-rotted air springs promptly prevents premature compressor failure.