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LR023964 Land Rover Discovery 3 L319 Hitachi Compressor Pump New Single
| Place of Origin | China |
| Brand Name | FHD |
| Certification | ISO 9001 |
| Model Number | Land Rover Discovery 3 L319/4 L320 |
The LR023964 air suspension compressor pump is an OEM-spec replacement part specifically designed for the 2004–2009 Land Rover Discovery 3 (chassis code L319). Manufactured by Hitachi, this compressor pump is one of the key power units of the Land Rover Discovery 3 electronic air suspension system. Its primary function is to supply compressed air to the four-wheel independent air suspension system, maintaining ride height, adjusting suspension stiffness, and working with the Terrain Response system to ensure off-road capability, comfort, and handling stability across various driving conditions.
The Discovery 3 used two compressor suppliers between 2004–2009: AMK and Hitachi, with Hitachi-type compressors primarily fitted to certain model years and specific market vehicles. This is a brand new single pump unit – the compressor pump body is supplied as a standalone component without the dryer, relay, or mounting bracket. It is suitable for repair scenarios where only the pump body needs replacement, effectively resolving issues such as suspension sagging, abnormal ride height, and suspension fault warnings on the dashboard caused by compressor aging or failure.
💡 Selection Tip: This is a Hitachi-type single pump (pump body only) – it is ONLY suitable for Discovery 3 vehicles originally equipped with Hitachi compressors and is NOT interchangeable with AMK-type compressors. Please verify your original compressor brand and model before purchase.
| Parameter | Specification |
|---|---|
| Product Name | Air Suspension Compressor Pump |
| OE Number | LR023964 |
| Brand | Hitachi |
| Vehicle Application | Land Rover Discovery 3 L319 (2004–2009) |
| Chassis | L319 |
| Voltage | 12V |
| Maximum Operating Pressure | Approx. 180 PSI |
| Included Components | Compressor pump body (does NOT include dryer, relay, or bracket) |
This product is compatible with the following Land Rover Discovery 3 (L319) models:
Land Rover Discovery 3 – 2004 to 2009 model years
Chassis code: L319
Engine types: 2.7L TDV6 Turbo Diesel, 4.0L V6 Petrol, 4.4L V8 Petrol
Vehicle configurations: HSE, SE, and S (with optional air suspension) versions equipped with Hitachi-type air suspension compressors
⚠️ Important Note: The Discovery 3 used two types of compressors between 2004–2009: AMK-type and Hitachi-type, and they are NOT interchangeable. The Hitachi-type compressor features a hexagonal dryer cap with a "D"-shaped mounting bracket, while the AMK-type compressor features a round dryer cap secured by a large angle steel bracket. This is a Hitachi-type single pump and is ONLY suitable for vehicles originally equipped with Hitachi compressors. Please verify your original compressor brand and OE number before purchase. Additionally, some entry-level Discovery 3 models with coil spring suspension do not have an air compressor – this product is NOT compatible.
This product is a direct replacement for the following OEM part numbers:
LR023964, LR025111, LR015089, LR031688, LR035716, LR039569, LR040518, LR045251, LR044465, LR046177, RQG500040, RQG500041
OEM Quality, Manufactured by Hitachi: Produced by Hitachi, one of Land Rover's original equipment suppliers for the Discovery 3 air suspension compressor, delivering quality identical to factory-installed units.
Direct Replacement, No Programming Required: No suspension control module reprogramming is required after installation (fault codes may need to be cleared); plug and play.
Single Pump Design, Flexible Replacement: Standalone pump body design for repair scenarios where only the pump body has failed while the dryer and bracket remain in good condition, reducing replacement costs.
Built-in Overheat Protection: Equipped with a thermal overload protection device to prevent damage from prolonged high-load operation, enhancing durability and safety.
Efficient and Quiet Operation: Hitachi is renowned for precision manufacturing – this compressor features an optimized motor and air circuit design for stable, quiet, and efficient operation.
Q1: How do I know if my Discovery 3 needs a new air suspension compressor?
A: Common symptoms include: noticeable sagging at one corner or all four corners after parking; inability to adjust ride height while driving or slow raising/lowering (e.g., unable to switch to off-road height or access height); abnormal compressor noise, continuous running, or complete failure to operate; "SUSPENSION FAULT" warning on the dashboard; vehicle stuck at minimum height and unable to rise. If any of these occur, it is recommended to use a diagnostic tool (such as IID BT GAP or factory SDD) to read fault codes for accurate fault localization as soon as possible.
Q2: How do I tell whether my Discovery 3 has the Hitachi-type or AMK-type compressor?
A: The most straightforward method is to check the shape of the compressor dryer cap – the Hitachi-type has a hexagonal dryer cap with a "D"-shaped mounting bracket; the AMK-type has a round dryer cap secured by a large angle steel bracket. Alternatively, check the OE number on your original compressor label – LR023964 or LR025111 corresponds to Hitachi type, while LR045251 corresponds to AMK type. They are NOT interchangeable – be sure to confirm before purchasing.
Q3: What should I pay attention to when installing the LR023964 single pump?
A: Pay special attention to the following points: First, confirm that your original compressor is the Hitachi type before installation – this product is NOT compatible with AMK systems; Second, check the condition of the original dryer – if the desiccant is saturated or discolored, the dryer must be replaced at the same time, otherwise it will shorten the new pump's lifespan; Third, it is recommended to replace the relay at the same time during installation; Fourth, after installation, use a professional diagnostic tool to perform suspension system inflation and deflation tests and clear any fault codes; Fifth, during the first run after installation, observe whether the compressor operates as required and check all air line connections for leaks. Professional installation by a technician with Land Rover service experience is recommended.
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