And worldwide longer than any other supplier! Compressor Fault / Kit Diagnosis. When your garage informs you need a new compressor in our experience you generally do not! First thing you ideally need to do is have your vehicles diagnostic codes read and write them down (very important insist on it at your garage) and then physically check which type of compressor you have fitted on your vehicle (Compare Pictures in any of our related listings together with diagnostic code description). Oem Land Rover Discovery /RR Sport Hitachi unit, (Picture 2) Land Rover Discovery 3 4 & RR Sport replacement. Supplied unit (picture 3) or Land Rover Discovery 3 4 & RR Sport Aftermarket Dunlop Hitachi Copy unit (picture 4). We now illustrate at the beginning of our product descriptions for. The fault code the particular kit you are viewing will help to resolve! These 2 codes are the bench mark codes that cause garages/customers to replace or repair their units. Pressure increase to slow when filling gallery. Compressor fault 92% of cases! Our master repair kit together with fitting instructions recommended. Other code diagnosis =. Resorvoir pipe air leak /Gallery Pipe air leak/Intake filter blocked or restricted/Intake pipe blocked or restricted / Air suspension intake silencer blocked or restricted /Air suspension intake silencer blocked or restricted / corner valve stuck open /pressure sensor fault/ Electric motor burnt out / Piston connecting rod broken or jammed. Pressure does not decrease when venting gallery. Compressor fault 95% of cases , ! Our Exhaust valve seal & dryer filtration repair kit together with fitting instructions recommended. Other code Diagnosis =. Exhaust valve stuck closed/Exhaust valve does not hold minimum retention pressure/ Gallery pipe blocked or damaged / Pressure sensor fault / Air suspension exhaust silencer blocked or restricted / Air suspension exhaust pipe blocked or restricted / Reservoir valve block pipes incorrectly fitted (unions reversed). Please use our listings info/pictures as the definitive vehicle compressor compatibility information. Listing Kit / Part (Picture 1). This listing will supply you our Main Compressor repair kit with fitting instructions suitable for Oem Hitachi Air compressors, all parts included related to a c1a20. If you have a C1a13. We are the original designers of this product/products and are proven products over many years, please message us if you require further information. We understand their can be cheaper products elsewhere! Knowing the issues back to front inside & out! Trust us you have come to the right place. Air Compressor Serial Numbers. RQG500071 RQG500072 RQG500080 RQG500090 RQG500060 RQG500061 RQG500062 RQG500070. LR044360 LR01530 LR015303 LR023964 LR010376 LR045251 UUB504700 VUB504700RQG000017 RQG000018 RQG000019. The item “Discovery 3 4 Air Compressor Pump & Dryer Main Repair Kit Land Rover Hitachi” is in sale since Tuesday, January 14, 2020. This item is in the category “Vehicle Parts & Accessories\Car Parts\Suspension & Steering\Air Suspension & Parts”. The seller is “4x4airseals” and is located in golborne, Cheshire. This item can be shipped worldwide.