P38 Suspension Part Numbers: A Complete Guide for Land Rover Owners

If you own a 1995–2002 Land Rover Range Rover P38 and are dealing with a sagging air suspension, leaking air spring, or faulty compressor, you already know that finding the right P38 suspension part numbers can be frustrating. The P38 uses a complex EAS (Electronic Air Suspension) system with many components that look similar but are not interchangeable. This guide covers the essential part numbers for air springs, shock absorbers, air compressors, valve blocks, and height sensors. We’ll explain how to identify the correct parts for your vehicle’s build date, market, and axle position so you can order with confidence.

Understanding P38 Suspension Part Numbering

Land Rover used different part number formats over the production run. Early P38s (1995–1998) often have suffix letters like -A or -B, while later models (1999–2002) use different revisions. The key is that P38 suspension components are not all the same: rear air springs changed in 1999, and front air springs were revised on later models. Always verify your VIN and build month before ordering.

Why Part Numbers Matter

Using the wrong spring or shock can cause improper ride height, compressor overwork, or even suspension failure. For example, a rear air spring meant for a 1997 model will not fit a 2001 without modification. Similarly, the air compressor part number differs between early and late P38s due to changes in the dryer cartridge.

P38 Front Air Spring Part Numbers

The front air springs on a P38 are a single unit combining the spring and shock absorber. They are handed (left and right) and must be replaced in pairs for consistent handling.

Early Front Air Springs (1995–1998)

• Left front (driver side): RMB101540
• Right front (passenger side): RMB101550

These have a silver plastic dust cover and a black rubber bellows. The O-ring seal at the top can leak, so replacing the O-ring (part number RYG101180) is sometimes recommended during installation.

Late Front Air Springs (1999–2002)

• Left front: RMB103700
• Right front: RMB103710

Later springs have a different internal buffer and a larger air fitting. They also use a different shock absorber valving. Do not mix early and late springs—the ride will be uneven.

OEM Alternatives for Front Air Springs

Original equipment manufacturers (OEMs) such as Arnott, Bilstein, and Dunlop produce replacement air springs. Cross-reference numbers:

• Arnott: AS-2790 (left), AS-2791 (right)
• Bilstein: 33-016771 (left), 33-016772 (right)

These aftermarket options often come with a new O-ring and dust cap, and may be more affordable than Land Rover genuine parts.

P38 Rear Air Spring Part Numbers

Rear air springs are separate from the rear shocks. They are also handed and changed in 1999.

Early Rear Air Springs (1995–1998)

• Left rear: RMB101570
• Right rear: RMB101580

These have a metal canister on top and a single air line fitting. The bellows are blue-gray. They are prone to cracking at the fold point after 60,000 miles.

Late Rear Air Springs (1999–2002)

• Left rear: RMB103720
• Right rear: RMB103730

The late springs have a different top mount and a revised bellows shape that resists cracking better. They also use a larger-diameter air fitting.

Aftermarket Rear Air Springs

• Arnott: AS-2788 (left), AS-2789 (right)
• Dunlop: DRC000100 (left), DRC000110 (right)

When replacing rear springs, always replace the rubber isolator pad (part number SEE100040) and the air line O-rings (RYG101180 again).

P38 Air Compressor Part Numbers

The air compressor sits under the passenger side front bumper. It pressurizes the system to raise the vehicle.

• Early compressor (1995–1998): NTC3590
• Late compressor (1999–2002): NTC3591

The difference is the internal dryer cartridge. The late compressor uses a larger dryer and has a revised purge valve. You can retrofit a late compressor into an early vehicle, but you must also change the dryer plumbing.

Compressor Overhaul Kits

Instead of replacing the whole compressor, you can rebuild it. Kits include new piston ring, seal, and dryer desiccant. Common kit part number: LR010375 (works for both early and late after modifying the air line adapter).

P38 Valve Block Part Numbers

The valve block (also called the EAS manifold) controls air flow to each spring. It is mounted on the driver’s side inner fender.

• Early valve block: NTC3595
• Late valve block: NTC3596

The late block has a different electrical connector and revised solenoid valves. If your system has slow raising or leaking diagnostic codes, the valve block is often the culprit.

Solenoid Replacement

You can buy individual solenoids for the valve block:

• Front left: AUF100020
• Front right: AUF100030
• Rear left: AUF100040
• Rear right: AUF100050

These solenoids tend to stick after years of use. Cleaning them with electrical contact cleaner can sometimes restore function, but replacement is more reliable.

P38 Height Sensor Part Numbers

There are four height sensors (one per wheel). They are identical for all P38 years.

• Height sensor (each): ANR2669

These sensors are robust but can be damaged by corrosion or impact. If your suspension displays erratic heights, check the sensor link arms for play before replacing the sensor itself.

Shocks for P38 (Non-Air Spring Systems)

The P38 only uses air springs; there are no separate coil spring conversion shocks in this part number guide. However, if you are converting to coils, you will need different shocks. Common conversion shock part numbers:

• Bilstein 4600: 24-186964 (front), 24-186965 (rear)
• Monroe: 72305 (front), 72306 (rear)

Practical Buying and Installation Tips

Where to Find Authentic Parts

Land Rover dealerships and specialist suppliers like Rovers North, Atlantic British, and Will Tillery carry genuine and OEM parts. For aftermarket, Arnott air springs come with a limited lifetime warranty on the bellows.

How to Confirm Your Part Number

1. Locate your VIN (on the driver’s side windshield base or door jamb).
2. Use a VIN decoder or call a Land Rover dealer to determine your build month.
3. If possible, look at the sticker on your air spring (usually visible with the wheel removed). The part number is printed on the can.

Common Mistakes to Avoid

• Do not assume all P38 springs are the same. The 1999 change is critical.
• Do not mix early and late air line fittings—threads are different.
• When replacing one spring, replace the other on the same axle to avoid uneven wear.
• Always replace the air line union O-rings when disconnecting lines.

Final Recommendation

For a stock P38 suspension rebuild, stick with genuine Land Rover air springs (RMB101540/550 for early front, RMB101570/580 for early rear, or the late equivalents). If you want better longevity and a lower price, choose Arnott air springs—they are built in the USA and come with clear instructions. For the compressor, buy the late model NTC3591 even if your P38 is early, as it’s an easy upgrade that improves reliability. Always replace the valve block solenoids if any corner fails to raise. With the correct P38 suspension part numbers, your Range Rover will ride smoothly for another hundred thousand miles.