Land Rover Discovery 3 L318 Wheel Carrier Knuckle Rear Right O/S 4H22-7G366-AA

Land Rover Discovery 3 L318 Wheel Carrier Knuckle Rear Right O/S is an original suspension component designed for diesel engine versions. Specifically engineered for the rear axle on the passenger side, it ensures precise wheel guidance, vehicle stability, and proper integration with the suspension and braking systems. This solution is dedicated to users who expect factory fitment, reliable geometry, and hassle-free installation.

Specifications and technical data

• SKU: RLH500020
• Mark: Land Rover
• Condition: Used
• OEM Part Number: RLH500020
• Substitutable numbers: RLH500020, 4H22-7G366-AA, 4H227G366AA
• Location on the vehicle: Rear, Right
• Fuel type: Diesel
• Category: Steering Knuckles

Purpose and function in the suspension system

The described knuckle is a structural component responsible for the stable mounting of the hub, bearing, and suspension elements on the right side of the rear axle. In the Land Rover Discovery 3 L318, it is responsible for:

• maintaining proper wheel geometry in the vertical and horizontal axes,
• transferring loads from the suspension to the chassis,
• providing a rigid mounting point for the hub and braking system,
• working in conjunction with control arms and alignment adjustment components. Thanks to its design, which complies with factory specifications, the knuckle maintains the parameters intended by the manufacturer, which translates into stable vehicle handling both off-road and on asphalt.

Compatibility with Land Rover Discovery 3 L318 diesel engines

The knuckle has been developed for versions with a diesel engine, which means it is compatible with the characteristic weight distribution and loads typical for this powertrain. Its placement on the vehicle is limited to the rear axle on the right side, which facilitates clear part selection during repairs or replacements following a collision, corrosion, or operational wear. Such compatibility allows for maintaining proper operation of the air or coil suspension (depending on the vehicle configuration) and correct interaction with factory braking and drivetrain components.

Characteristics of the used component

The presented knuckle is a dismantled part and has the status of a used component. This means it is a fully functional part that can be reused in a vehicle, providing an economical alternative to a new component. In practice, this allows you to:

• reduce repair costs while maintaining the original design,
• maintain the consistency of the suspension system with Land Rover's factory solutions,
• preserve compatibility with factory mounting points and suspension geometry. For many Discovery 3 L318 users, this is a reasonable compromise between cost and quality, especially during comprehensive rear axle repairs.

Benefits of using an original knuckle

Using an original knuckle in a Land Rover Discovery 3 L318 translates into a number of practical benefits:

• Factory fitment – no need for modifications, drilling, or adjusting mounts.
• Consistency with suspension geometry – easier alignment and angle adjustment after repair.
• Handling stability – predictable vehicle behavior during braking, off-road traction, and driving under load.
• Hassle-free installation – design compliant with factory standards facilitates the mechanic's work and reduces service time. This is particularly important for vehicles used in demanding off-road conditions, where the precision and durability of suspension components have a direct impact on safety and driving comfort.

Expanding rear axle repairs in your Land Rover

If you are planning a comprehensive repair or upgrade of the rear suspension area in your Land Rover and need other components from the same group, such as knuckles for the opposite side, additional mounts, or brackets, check out the available parts in the Land Rover Knuckles category. For drivers interested in a broader approach to the topic of original used parts and selection procedures based on OEM or VIN numbers, the article describing practical aspects of operating and servicing premium vehicles may be helpful – you can find it here: BMW – sports performance and precision. How do original used parts extend the life of a Bavarian icon?.