1. The air suspension valve control unit is located near the air suspension compressor. Air suspension solenoid valve blocks are responsible for distributing air from the compressor to the air cylinders or air springs. Over time, O-rings can dry rot, damaging the compressor through air leaks and overworking, as well as moisture damage to the solenoid's electrical components. 2. If the air suspension valve control unit fails, air can escape into the compressor or central air reservoir. This can prevent the vehicle from maintaining the required ride height. Therefore, the faulty valve block should be replaced as soon as possible. 3. Stable performance, high reliability. A perfect replacement for your old ones. Part Number: RVH500060 RVH500050 RVH000095 RVH000055 : For Land 2005-09 LR3 Air Suspension Valve Block 2005-09 LR3 Rear Air Suspension Valve Block 2010-16 LR4 Air Suspension Valve Block 2010-16 LR4 Rear Air Suspension Valve Block 2006-12 Range Rover Rear Passenger Side Air