· Land Rover Disco 3 LR3 4 LR4 Range Sport L320 AMK Air Suspension Compressor Pump. When the vehicle drops below factory height, the compressor turns on and fills the air bags. This is a NEW Compressor. Every single component is NEW and NOT Remanufactured. The Suspension Compressor Relay. It Supplies Power to the Compressor. When the Compressor Overheats it can cause damage to the Relay and need replacement. The Most Common cause for a leak in the system are old leaky Air Struts or Air Springs. LR3/Discovery 3 LR4/Discovery 4 Range Rover Sport (L320). International Buyers – Please Note. We do our best for you!!!! · We try to make sure you have a pleasant shopping experience with us, customers satisfaction is always our priority. · If there is any dissatisfaction. We will try our best to resolve the issues. Please give us the opportunity to resolve any problem. · If you are satisfied with our service. Your recognition will make us more confident to develop business and serve you better.