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Frequently Asked Questions

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Does Arnott sell products directly to consumers?

No, Arnott no longer sells its products directly to consumers or vehicle owners. Arnott products are widely available through leading warehouse distributors, installers and online resellers who often offer better than retail pricing, local availability, and can handle warranty issues.

Are Arnott products available internationally?

Yes, Arnott works with leading distributors, installers and resellers throughout the world. For distributors and customers in the EU region, Middle East and Africa please visit for more information. For resellers outside of North America and regions covered by Arnott’s EU office, Arnott ships most new parts using United Parcel Service (UPS). Arnott can ship via United States Postal Service (USPS) by request. For installers and resellers who need an immediate estimate on pricing and shipping, please contact Arnott Customer Care or use the Contact Form after hours. Be sure to list part number, description, and include your street address, city, and country.

Quoted shipping times are estimates only and are not guaranteed.

*International Shipping charges DO NOT include customs fees, import taxes, brokerage fees, or duties. Please contact your local customs office for more information on these costs.

NOTE: Some products are not available for shipping to locations outside of North America and The European Union.

How long does it take to receive my order?

Arnott Inc. ships from multiple distribution centers but not all parts are available in all warehouses. Ground shipping may take 1-5 business days, depending on what items are ordered and the state in which you live. UPS shipping options do not include Saturday delivery. Please email or call Arnott for Saturday delivery options (if available in your area). Next Day Air will arrive the next business day in the United States, 3-Day delivery will arrive in 3 business days. (Monday-Friday).

Arnott UPS Shipping Map

Is it possible to return a part if I do not want it?

You may return a part as long as it is less than 30 days from the date of purchase or within 90 days for unused and uninstalled products. An original Arnott invoice and a Return Material Authorization (RMA) number are required.

What is the Arnott Warranty on Air Suspension parts?

Arnott Inc.® offers a Limited Lifetime Warranty for North American customers on Arnott Air Springs, Air Struts, Compressors, Coil Spring Conversion Kits, Valve Blocks and Arnott Adjustable Motorcycle Suspension Kits. Orders for Arnott products outside of North America, including the European Union, come with a Limited Two-Year Warranty. Arnott is so confident you will be 100% satisfied with your product that it offers you a 30-Day Money Back Guarantee and a 90- Day Return Policy on unused and uninstalled products. Arnott offers a 30-Day Warranty on parts used in commercial vehicles. Improper use or installation is not a manufacturer's defect. The Arnott Warranty is non-transferable.

For complete Warranty details and limitations, please click here.

Do Arnott products include instructions?

Most Arnott parts have detailed installation manuals which are available for download by visiting These downloadable manuals are available as PDFs in English or can be accessed and translated as a web page using Google Translate. Some parts include Technical Service Bulletins (TSBs) that alert installers of common installation issues they should be aware of. Any product TSBs, along with multi-language instructions for accessing and downloading Arnott's Manuals, will be included with your product. Arnott also has a growing selection of professionally produced Installation Videos that are linked to their products on

How do I Return Cores to Arnott?

Arnott has made it easy to return your cores (used OE Air Suspension Parts) for the refund of your core deposit (for North American customers). Carefully pack your core in the box that your new Arnott product came in and include a copy of your invoice for your core deposit refund. You should have also received a pre-paid shipping label which you can put on the outside of the box and then return the core to Arnott. It is that simple. If you did not receive a pre-paid shipping label please call 800-251-8993 or email [email protected]. We will promptly email, fax or mail you a label.

Where can I find definitions for some of the automotive terminology used on the Arnott site?

Confused by ride control terminology? Arnott has a compendium of ride control and suspension terms. The online dictionary includes almost 100 terms broken down in alphabetical order. The list includes popular terms used in Arnott part descriptions along with other terms from the suspension and air suspension industry. To access the list please click here.

Where are Arnott parts made?

Most Arnott parts are assembled at Arnott's Merritt Island, Florida facility using high-quality foreign and domestic components. Foreign materials are part of many of the import cores Arnott remanufactures, OE compressors Arnott sells, and various components used to assemble Arnott springs, new and remanufactured parts, and conversion kits.

Will Arnott air suspension parts ride differently from the originals?

No. Arnott air springs are just like the originals. You will not notice any difference in ride quality. Arnott designs its air springs with the same spring rate and load capabilities set by the original manufacturer.

How long do air suspension parts last?

Air springs normally last 80,000 to 100,000 miles. Over this time, the rubber bladder dries out, and cracks appear around the bottom piston. Compressors usually wear out because of leaky air springs. However, the computer and height sensors generally last the life of the vehicle.

Will Arnott designed new struts work with my vehicle's suspension controls?

Arnott Remanufactured OE struts use the vehicle’s internal electronic controls to adjust factory supplied suspension controls such as auto-leveling and / or auto damping (where available). Arnott designed new struts use custom valved shocks that don’t require or use the factory air suspension controls.

Why do some of your compressors look different from the original factory part?

While many of Arnott's compressors come from the Original Equipment Supplier they often are not exactly the same as the original compressor. Some Arnott compressors feature improvements to the original design such as different wiring harnesses, brackets and filters. Others may require the re-use of stock mounting hardware or wiring. In some cases the compressor is different because the OE compressor changed supplier. Arnott tests every compressor and includes all of the necessary mounting hardware, accessories and installation instructions and backs its compressors with a Limited Lifetime Warranty in the EU.

What are Variable-Rate Coil Springs?

Variable-rate coil springs are metal springs designed to change stiffness as they deflect. A variable-rate spring uses coils of varying thickness or spacing to provide a softer ride when the vehicle is carrying a light load, but a firmer ride when the load increases. On many vehicles, the rear air springs can be replaced easily with variable-rate springs. While variable-rate springs can help with heavier loads, they are not meant to be a replacement for load-leveling air suspension in vehicles used to tow large trailers or heavy loads.

What is the difference between Arnott's New Passive Rear Shock (AS-2700) and the Arnott Remanufactured Rear Shock (AS-2708)?

AS-2700 - Arnott New Passive Rear Air Shock
This air-assisted shock replacement is new and not remanufactured. Internal shock damping is not electronic and includes a bypass sensor to turn off any warning lights.

AS-2708 - Arnott Remanufactured OE Electronic Air Shock
This remanufactured air-assisted electronic shock provides OE electronic damping and air leveling is the same as the original.

Should I replace the air suspension parts or just convert my car to coil springs?

If you like the load-leveling capabilities, or if you tow with your vehicle, then you should repair the air suspension system. If you are tired of replacing the many components of which your air suspension consists, then Arnott's coil spring conversion kit should be perfect for you

Do I have to weld or modify my car to make your coil spring conversion kits fit?

Absolutely not! Arnott conversion kits are designed to bolt directly to your vehicle's suspension. No special tools are necessary to install Arnott conversion kits. Arnott kits come preassembled and ready to bolt in. All Arnott suspension brackets are specifically engineered for your vehicle, and CNC-machined at the Arnott factory in Merritt Island, FL.

Should I replace the air dryer along with my leaky air springs?

Yes. Arnott highly recommends changing the air suspension dryer when you have had a leak in the air suspension system. The air dryer becomes saturated with moisture when the compressor is overworked because of a leak in the system. Replacing the air dryer will prolong the life of your air compressor and air spring solenoids.

How do I remove the air lines from my compressor dryer or solenoid?

The air lines are removed from the used part by pushing in on the fitting and pulling out on the air line at the same time. The fitting usually has an orange plastic ring around it. If it does not, that is okay ... simply push in on the brass fitting instead.

I installed Arnott's shocks (AS-2700, AS-2715, SK-3062, SK-2760 and SK-2806) however, now my ABS and Stability Traction control light is on. What do I do?

There’s an ABS sensor along the frame rail near the top mount on the shock. It is possible that this may be disconnected. If it is, plug it back in and the message should go away.

Which side of my car is the Right and Left?

The right and left sides of an automobile are determined as if sitting in the car facing forward. Thus, the left side is on the left when sitting in the car facing forward, and the right side is on the right. For American cars, the driver’s side is on the left, and the passenger sits to the right of the driver. For cars in Japan, Britain, Ireland, the Bahamas and some other former British colonies -- where they drive on the left side of the road -- the passenger sits on the left side, and the driver (along with all the driving controls) is on the right.

How can I tell if my Cadillac is a Concours or an ETC model?

The vehicle should be labeled as such on the rear or side doors.
Cadillac ETC Rear
Cadillac ETC Side Door

How can I tell if my GM Truck has Autoride?

GM vehicles have a sticker called the Service Parts Identification Label located in the glove compartment (for trucks & SUVs) that includes information such as the vehicle’s VIN, Wheel Base, Model designation and a list of the vehicle’s 3 digit/character RPOs or Regular Production Options which are the options that car comes with. The code Z55 is the RPO code which indicates the option of Autoride electronic suspension

How can I tell if my Mercedes has 4MATIC®?

4MATIC® is a Mercedes registered trademark for all-wheel drive. Usually, if the vehicle features 4MATIC®, there will be an emblem on the right side of the trunk. See illustration below.
Mercedes-Benz 4MATIC

What is ADS? How can I tell if my Mercedes is equipped with ADS suspension?

ADS stands for Active Dampening System. ADS is standard on all GL550 and ML trucks equipped with AIRMATIC. ADS was optional on all other GL models such as the GL320, GL350, and GL450. You can easily check to see if your truck is equipped with ADS by examining the AIRMATIC control buttons located on the dash panel below the Air Conditioning controls. Please see pictures below.
Mercedes-Benz ADS Suspension

How can I tell if my Mercedes S-Class is equipped with AIRMATIC® or ABC?

AIRMATIC® is a Mercedes trademark for air suspension. ABC stands for Active Body Control. ABC was a rare option on all S-Class models. ABC, however, was standard on all S-600, S-55, S-63, and S-65 models. You can tell which suspension you have by opening the hood of your car and examining the top of the shock absorber.

If the car is equipped with AIRMATIC, you will have obvious air lines leading from the top of the shocks.
Mercedes-Benz AIRMATIC VS ABC Suspension

If your car is equipped with ABC, you will have small black electrical plugs leading into the top of both shocks.
Mercedes ABC Suspension