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Arnott Air Suspension - Frequently Asked Questions (FAQ)

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  • What is the Arnott Warranty on Air Suspension parts? 
    Arnott Inc.® offers a Limited Lifetime Warranty for North American and European Union customers on Arnott Air Springs, Air Struts, Shocks, Air Suspension Compressors, Coil Spring Conversion Kits and Motorcycle Air Suspension Kits. Orders for Arnott products outside of North America and the European Union come with a Limited Two-Year Warranty (Five Year Limited Warranty on Motorcycle Kits). Arnott’s Warranty is non-transferable. If a part is defective, Arnott will either replace or repair that part, as long as it is within the Warranty period and proof of purchase is provided. Arnott offers a Limited 30-Day Warranty on parts used in commercial vehicles. Improper use or installation is not a manufacturer's defect.

    Arnott is so confident you will be 100% satisfied with Arnott products that it offers you a 30-Day Money Back Guarantee and a 90-Day Return Policy on unused and uninstalled products.

    Click here to download Arnott's Warranty, Return & Refund Policy in English

    Click here to download Arnott's Warranty, Return & Refund Policy Français

  • Is it possible to return a part if I do not want it?
    You may return a part 30 days from the date of purchase. Uninstalled and Unused products may be returned within 90 days. You must call Arnott  for a Return Material Authorization (RMA) number before returning the item.

  • How long does it take to receive my order?
    Arnott Inc. ships many of its most popular items from a Distribution Center in Ontario using Purolator. Items that are out of stock or not available from the  Canadian warehouse are shipped from Arnott's  Florida, USA headquarters via United Parcel Service (UPS). Ground shipping may take 1-8 business days, depending on what items are ordered and in what province you live. Purolator shipping options do not include Saturday delivery.


  • Online orders placed before 2:00 pm ET (for in-stock items) will be sent out that day when possible. Orders may be placed by phone Monday thru Friday 8:00 AM to 7:00 PM ET (except on US holidays.) You may place orders online 24 hours a day, 7 days a week. Online orders placed on weekends or US holidays will be filled the next business day.


  • Is there a way to avoid paying the core charge?
    • To avoid having to pay a core charge when purchasing some of Arnott's new or remanufactured products, you may be able to first send the used part to Arnott (you must contact Customer Support to set this up). Upon receipt of the core and your payment for the new or remanufactured part, Arnott will immediately send you the new or remanufactured part from inventory (if available). For further information please call Arnott during normal business hours or email Customer Support.

  • Do you ship internationally?
    Yes, but not from this Web Store. Please visit to place an order for delivery in the USA or any other country beside Canada.  

    *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.

  • Why do some of your compressors look different from the original factory part?
    Some Arnott compressors feature improvements to the original design. For example the aftermarket compressor for the Lincoln Continental Mark VIII has an internal filter rather than an external filter. Also. sometimes customers confuse the air suspension compressor with the ABS (brakes) compressor. The ABS compressor will have metal lines, rather than plastic.

  • 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.

  • Do Arnott products include instructions?
    Some Arnott parts include manuals and some do not. If available, instructions will be shipped along with your part. In addition, installation manuals can be downloaded from the Arnott Main Website - Manuals and should come with your part. Arnott also has a wide selection of Installation Videos that are linked from the available product pages or from the Arnott Main Website - Videos page.

  • 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.

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

  • 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.

  • 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.

  • What types of payments do you accept?
    Arnott accepts all major credit cards including Visa, MasterCard, American Express, and Discover. If you do not have a credit card you may also pay via PayPal or Bank Wire. All prices are in U.S. dollars and payments are accepted only in U.S. dollars.

  • 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 the 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.

  • 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.

  • 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 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 long do air suspension parts last?
    Rubber air springs normally last six to eight years or 130,000 to 160,000 km (80,000 to 100,000 miles) depending on local climate and road conditions. 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.

  • How do I remove the air lines from my compressor dryer or solenoid?
    The air lines are removed by pushing in on the fitting and pulling out on the 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.

  • What is the difference between your new air shock (AS-2127) and your rebuilt air shock (AS-2411)?





  • I installed your Bilstein shocks (AS-2127, SK-2126 or SK-2487). 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.