Range Rover Service Center
The most common EAS problems are leaking and dry rotted air bags, and damaged height sensors. The bags begin to leak at 100,000 miles or 6 years of age in most climates. The sensors get damaged by winter salt intrusion in snow country, and by being pulled beyond their travel limits when the wheels are dangled.
Lifting the car on service lifts that dangle the axles can damage the air bags. When lifting a Rover on such a lift pay attention that the air bags do not pull away from the end caps and deflate. If they do, you will have to carefully guide them back together and hope the system re-inflates on startup. Otherwise, you'll need a Testbook reset.
Spark Plug recommendations: All pre-1999 Rovers can use the Champion RN12YC spark plug. It's widely available at auto parts stores. We prefer the 12 to the 11 heat range the factory recommends. In other countries these plugs may be offered as N12YC or N12. They are OK also, but we suggest changing them every 15,000 miles. Newer Rovers with the Bosch engine management use a special platinum Champion plug. RN12YC can be fitted in a pinch. We suggest you change the regular plugs every 30,000 miles and the platinum plugs every 60,000 miles.
Climate Control Problems on the New Range Rover: One common problem you can check yourself is the relays. Look in the relay box under the hood. In particular, look at the relays in the front for evidence of burning or brown spots on the case. Those relays power the fans, and they are prone to burn out and produce erratic operation.
Another common problem is servo failure. Your Rover uses servo motors to mix hot and cold air to regulate temperature. A symptom of servo failure is one side of the car staying hot or cold while the other side regulates normally. Servo replacement is costly — near $900.