Air spring solenoids play a vital role in air suspension systems by distributing air from the compressor to the struts and springs. Over time, the valve block O-rings can become dry and brittle, resulting in air leaks that overwork the compressor and allow moisture to degrade the electrical solenoid components. Cardone 100% new air spring solenoids are engineered to meet or exceed O.E. Performance and return the air system to proper function.