2006 Toyota Sequoia Air Suspension Parts: A Buyer's Guide

The 2006 Toyota Sequoia offered an optional air suspension system on higher trims, providing a smooth ride and automatic load leveling. Over time, components such as air springs, compressors, and height sensors can fail. This guide covers the essential parts you may need, what to look for when buying replacements, and how to decide between OEM and aftermarket options.

Key Components of the 2006 Sequoia Air Suspension

The air suspension system on the 2006 Sequoia consists of several main parts that work together to maintain ride height and comfort.

Air Springs (Air Bags)

Each rear wheel has an air spring—a rubber bladder that holds compressed air to support the vehicle's weight. These are prone to cracking, leaks, or punctures from road debris. Symptoms include a sagging rear end, hissing sounds, or the compressor running excessively.

• OEM air springs (Toyota part number 48240-0C020 or similar) are made to original specifications and offer reliable fit and durability. Expect to pay more than aftermarket options.
• Aftermarket air springs from brands like Arnott, Dorman, or Air Lift provide a lower-cost alternative. Many are manufactured with improved rubber compounds that can outlast OEM parts.

Air Compressor and Dryer

The compressor pumps air into the springs and includes a dryer that removes moisture. Common issues: compressor burnout due to overwork (often caused by leaks elsewhere), or a failed dryer that allows moisture into the system. A failing compressor may run continuously or not build pressure.

• OEM compressor (part 48920-0C010) is direct fit but expensive.
• Aftermarket compressors from brands like VIAIR or ARB are popular upgrades because they are more robust and often include a better dryer. Some are even more compact for easier installation.

Height Sensors

Two sensors (one per rear wheel) measure ride height and signal the ECU to adjust air pressure. Symptoms of a bad sensor: uneven ride height, dash warning light, or suspension not leveling. Sensors can fail internally or get damaged by corrosion.

• OEM height sensors are recommended for accuracy, but aftermarket options exist from brands such as Standard Motor Products.

Solenoid Valve Block and Lines

Air lines run from the compressor to the springs, controlled by solenoid valves. Leaks can occur at connections, in the lines themselves, or within the valve block. This part is less commonly replaced but should be inspected if you have a persistent leak.

OEM vs Aftermarket: Which Should You Choose?

Your choice depends on budget, your willingness to perform maintenance, and how long you plan to keep the vehicle.

OEM Parts

• Pros: Guaranteed fit, factory performance, and typically longer warranty.
• Cons: Higher cost (a single OEM air spring can cost over $300).
• Best for: Owners who want a direct replacement and are not concerned about cost.

Aftermarket Parts

• Pros: Lower price (air springs often $100–$200 each); some brands offer lifetime warranties; performance improvements (e.g., stronger compressors).
• Cons: Fit may be slightly different; quality varies by brand.
• Best for: Budget-conscious owners or those who want to upgrade reliability.

Common Problems and Replacement Tips

Leaks

The most frequent issue is air loss from a cracked spring or a loose line connection. To locate a leak, listen for hissing or spray soapy water on suspect areas. Fixing a small leak might be as simple as tightening a fitting, but often the spring needs replacement.

Compressor Failure

If the compressor runs constantly but the suspension doesn't rise, the compressor may be worn out. Overheating is a common cause—allow the system to cool and check for restrictions in the air intake. Replacing the compressor also requires replacing the dryer (often included in a kit).

Sensor Issues

A faulty height sensor can cause the suspension to stay at one height or the warning light to come on. Cleaning the sensor connection with electrical contact cleaner sometimes resolves the issue, but replacement is usually needed.

Converting to Coil Springs

Some owners choose to delete the air suspension entirely and install conventional coil springs. This is a permanent solution that eliminates future air suspension problems. Kits are available from companies like Strutmasters or Arnott that include springs and necessary hardware. This conversion is cost-effective and simplifies maintenance, but ride quality changes—you lose the load-leveling feature.

Step-by-Step Replacement Guide (Overview)

Replacing an air spring or compressor on a 2006 Sequoia is a moderate DIY job. Here is a high-level walkthrough:

1. Safety: Jack up the vehicle and support on jack stands. Wear safety glasses.
2. Relieve air: Some systems have a manual bleed valve; otherwise, disconnect the fuse or relay for the compressor and let the system release air by turning the ignition off and on.
3. Remove wheel and tire: Access to the suspension components is easier with the wheel off.
4. Disconnect air line: Use a line disconnect tool (plastic or metal) to release the push-to-connect fitting at the spring.
5. Unbolt spring: Remove the lower bolt and any clips; the spring may separate from the upper mount.
6. Install new spring: Reverse steps, lubricate the rubber seat lightly with silicone grease.
7. Test: Reconnect the compressor fuse, start the engine, and check for correct ride height and leaks.

For compressor replacement, the steps involve disconnecting the battery, removing the compressor assembly (often located under the vehicle near the rear), transferring the dryer and bracket, and reinstalling.

Signs Your Air Suspension Parts Need Replacement

• Sagging: One corner of the rear sits lower, especially after the vehicle has been parked overnight.
• Continuous compressor running: The compressor runs for more than a minute after start-up or never shuts off.
• Ride quality deterioration: The vehicle bounces excessively or feels harsh.
• Warning light: The “SUSPENSION” or “AHC” light on the dash illuminates.
• Hissing sounds: Audible air leaks near the rear wheels or under the chassis.

Recommended Brands and Part Numbers

Air Springs

• OEM: Toyota 48240-0C020 (left), 48240-0C010 (right) – approximately $300 each.
• Arnott AS-3626: $180–$220, includes new solenoid and comes with a lifetime warranty.
• Dorman 949-204: $160–$200, corrosion-resistant materials.

Compressors

• OEM: Toyota 48920-0C010 – $500–$700.
• VIAIR 150C: $120–$150, high flow, easy to mount, includes dryer.
• Arnott ARN-0013: $250–$300, direct replacement with upgraded internals.

Conversion Kits (Air to Coil)

• Strutmasters 3001-0421: $400–$500, includes springs, brackets, and hardware.
• Arnott K-1600: $550–$700, complete kit with new shocks and springs.

Final Recommendation

For most owners of a 2006 Toyota Sequoia, the smartest approach is to replace worn air suspension components with high-quality aftermarket parts from trusted brands like Arnott or VIAIR. These offer better value than OEM, often with improved durability. If you are experiencing multiple failures or want the lowest maintenance option, consider a coil spring conversion—it eliminates air suspension issues permanently, though you lose load-leveling capability. Inspect the entire system before ordering parts: a leaking spring may have damaged the compressor, so replace both at the same time to save labor. Always verify compatibility with your specific trim level (Limited, etc.) before purchase. With proper maintenance, your Sequoia’s suspension will provide many more miles of comfortable driving.