The Arnott Air Suspension Compressor P-3431 for the 2006-2013 Range Rover Sport, the 2005-2009 Land Rover Discovery LR3 and 2010-2016 LR4 is designed to replace the problematic Hitachi OE compressor. This Arnott air supply unit is built to OE specs and includes a bracket and cover so it can easily replace the OE pump and cover. This new compressor includes an integrated dryer, new relay, thermal overload protection, hoses and fasteners. The compressor comes pre-wired for fast plug & play installation. **If replacing the OE Hitachi compressor a dealer provided software update is required.**