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RQG100041 Land Rover Discovery 2 L318 Wabco Suspension Compressor Unit
Product Introduction
The RQG100041 air suspension compressor is an OEM-spec replacement part specifically designed for the 1998-2004 Land Rover Discovery 2 (chassis code L318). Manufactured by Wabco, this compressor is the core component of the Discovery 2's Electronic Air Suspension system (SLS - Self-Levelling Suspension). Its primary function is to supply compressed air to the rear axle air springs, enabling automatic rear ride height adjustment and self-levelling, ensuring stable vehicle attitude under heavy loads or towing conditions.
The rear air suspension system on the Discovery 2 is semi-active in design. The compressor operates automatically based on signals from ride height sensors - actively inflating when rear axle load increases to maintain height, and releasing air when load decreases to lower the vehicle. This is a brand new complete pump unit, supplied with the necessary dryer and relay for installation, effectively resolving issues such as rear-end sagging, abnormal ride height, and suspension fault warnings on the dashboard caused by compressor aging.
Technical Specifications
Parameter
Specification
Product Name
Air Suspension Compressor Unit
OE Number
RQG100041
Brand
Wabco
Vehicle Application
Land Rover Discovery 2 L318 (1998-2004)
Application Position
Rear axle air suspension system
Voltage
12V
Maximum Pressure
Approx. 150 PSI
Included Components
Compressor unit, dryer, relay, bracket, connecting hoses
Vehicle Applications
This product is compatible with the following Land Rover Discovery 2 (L318) models:
Land Rover Discovery 2 - 1998 to 2004 model years (including Series I and Series II facelift)
Chassis code: L318
Engine types: 2.5L Td5 Turbo Diesel, 4.0L V8 Petrol
Vehicle configurations: Station wagon and 7-seat variants equipped with rear air suspension (SLS system)
⚠️ Important Note: The Discovery 2 rear suspension is available in two configurations: coil spring version and air suspension version. This product is ONLY suitable for vehicles equipped with rear air suspension (SLS system). It is NOT compatible with coil spring versions. Please verify that your vehicle is equipped with an air compressor (typically located behind the right rear wheel arch liner) before purchase.
Replacement OE Numbers
This product is a direct replacement for the following OEM part numbers:
OEM Quality, Manufactured by Wabco: Produced by Wabco, the original equipment supplier for the Land Rover Discovery 2 rear suspension compressor, delivering quality identical to factory-installed units.
Direct Replacement, Easy Installation: Complete unit design with bracket, dryer, and relay included - direct fit with no additional modifications required.
Specifically Designed for Rear Self-Levelling: Optimized for the Discovery 2 SLS system, automatically detecting rear axle load changes and adjusting air pressure to keep the vehicle level under any load, improving towing stability and driving safety.
Integrated Dryer: The built-in dryer effectively absorbs moisture from compressed air, preventing internal system icing and corrosion, extending the service life of the entire suspension system.
Built-in Overheat Protection: Equipped with a thermal overload protection device to prevent damage from prolonged operation, enhancing durability.
Warehouse & Workshop
Keep dry, clean and handle with care.
Global Exhibitions
Think Global, Act Local. Proven Worldwide.
Frequently Asked Questions
Q1: How do I know if my Discovery 2 needs a new air suspension compressor?
A: Common symptoms include: noticeable rear-end sagging or leaning to one side; inability to automatically adjust rear ride height while driving; abnormal compressor noise or continuous running; "SUSPENSION FAULT" warning on the dashboard or rear height warning light illumination; severe rear-end sinking under heavy loads with inability to recover height. If any of these occur, it is recommended to inspect the compressor and dryer condition as soon as possible. Note that rear sagging may also be caused by air spring leaks - it is advisable to perform a soapy water leak test on the air springs first.
Q2: How do I confirm whether my Discovery 2 has air suspension or coil springs?
A: The most straightforward method is to check whether there is an air compressor and reservoir tank behind the right rear wheel arch liner (typically near the right rear tail light area). Additionally, vehicles with air suspension use rubber air bags instead of coil springs on both sides of the rear axle, which can be observed directly at the rear wheels. If your vehicle is a coil spring version, this product is NOT compatible.
Q3: What should I pay attention to when installing the RQG100041 compressor?
A: Pay special attention to the following three points: First, the dryer must be replaced at the same time (this unit is supplied with one) - the old dryer may have become saturated with moisture, which will shorten the new compressor's lifespan if not replaced; Second, be sure to disconnect the vehicle's battery negative terminal and release residual air pressure from the system before installation to ensure safety; Third, after installation, start the vehicle and observe whether the rear axle rises properly and remains level. It is recommended to use a professional diagnostic tool to clear fault codes and perform a system inflation test. Professional installation by a technician with Land Rover service experience is recommended.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2017
Total Annual:
5000000-10000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Founded in 2017,Guangzhou Fenghui AutoParts Co.,Ltd.is an enterprise focusing on R&D, production,processing and export sales of variable damping inductive shock absorbers and air suspension for high-end cars.
Main business:a full range of inductive shock absorbers, air suspension springs,pneuma... Founded in 2017,Guangzhou Fenghui AutoParts Co.,Ltd.is an enterprise focusing on R&D, production,processing and export sales of variable damping inductive shock absorbers and air suspension for high-end cars.
Main business:a full range of inductive shock absorbers, air suspension springs,pneuma...
