Arnott P-3730 Air Suspension Compressor

Land Rover Air Suspension Compressor

Restore proper air suspension performance with the Arnott P-3730 air suspension compressor for select Land Rover Discovery LR3, LR4, and Range Rover Sport models. This NEW compressor is a direct replacement for the original OE unit and is built by AMK, the same manufacturer used for the original application.

Arnott’s NEW product line focuses on direct-fit suspension replacement parts that match OE application requirements. For this compressor, that means a compact, lightweight design with the pressure and control needed for Land Rover air suspension systems.

Key Features

• Direct replacement air suspension compressor for select Land Rover Discovery LR3, LR4, and Range Rover Sport applications
• Brand new AMK-built compressor assembly
• Maximum pressure rating: 185
• 12V electrical system
• Includes mounting bracket, dryer, and relay
• Black finish with 3 mounting holes
• Standard grade replacement part
• Arnott part number P-3730

Detailed Description

The Arnott P-3730 is an air suspension compressor assembly kit engineered for 2005-2016 Land Rover Discovery LR3 and LR4 models, plus 2006-2013 Range Rover Sport vehicles. It replaces OE compressor part numbers including LR044016, LR044360, LR045251, LR045444, LR061663, LR061888, LR072537, LR072539, and LR078650. This part cross-references Land Rover OE numbers LR044016 and LR061663 for the same application.

Built by AMK, the compressor is designed to deliver efficient air supply for suspension height control and system recovery. The compact, lightweight construction helps simplify packaging in the vehicle while maintaining the output needed for Land Rover air suspension operation. If you are replacing a worn compressor on a Land Rover LR4, LR3, or Range Rover Sport, P-3730 provides a direct-fit solution for the original system layout.

Common Problems This Part Can Address

• Slow or failed suspension lift after startup
• Compressor running too often or for extended periods
• Vehicle sitting low from loss of air pressure
• Air suspension warning messages related to compressor performance
• Reduced ride-height adjustment response

Installation Notes and Tips

Verify vehicle year, model, and VIN details before installation, especially for 2012 LR4 applications noted to VIN 639077. This compressor includes a mounting bracket, dryer, and relay, but does not include mounting hardware, wiring harness, or valve block. Confirm the existing air suspension system condition before replacing the compressor so underlying leaks or electrical faults do not affect the new unit.

Quality Assurance

Arnott supplies OE-style suspension replacement components, and this compressor is produced by AMK, the original manufacturer for the application. The result is a new, direct replacement part built to match the Land Rover air suspension system requirements for the listed vehicles.

• Fits 2013-2016 Land Rover LR4, N/A
• Fits 2006-2013 Land Rover Range Rover Sport, N/A
• Fits 2012 Land Rover LR4, N/A; AMK OES; To VIN 639077; NEW
• Fits 2010-2011 Land Rover LR4, N/A
• Fits 2005-2009 Land Rover LR3, N/A