The air suspension may need to be repaired in the presence of the following signs: tire flat spotting when the car is parked or obvious extraneous sounds when starting the compressor. The air suspension diagnostics include checking the air suspension electronic control circuit, checking the system for leaks, checking the pump, air bellows and shock absorbers, all of which can break. But most often pneumatic cylinders or air struts fail, since they have an actual resource of about 50-60 thousand km. Air suspension repair can include both repair and replacement of its individual elements.