Land Rover,Air compressors and air suspension fail

The air compressors that raise my SUV up and down were defective. Also, the warning light came on for the air suspension. I took the SUV to the auto repair shop and they replaced the compressors. A few months later, the air compressors that are related to the air suspension failed again. Can you tell me what I can explain to an auto repair shop that they can do to permanently fix this?