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  1. Air Suspension Compressor Kit
  2. Air Lift
  3. Automatic Leveling
  4. Dual Path
  5. 100 psi
  6. No Display
Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor

Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor

Item # AL25491
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Air Suspension Compressor Kit
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Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor 100 psi AL25491
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Air Lift Air Suspension Compressor Kit - AL25491

  • Automatic Leveling
  • Dual Path
  • Air Lift
  • 100 psi
  • No Display


  • Compressor system automatically levels your vehicle using a unique non-contact magnetic height sensor, which allows the system to intelligently determine whether the air springs should be inflated or deflated
  • Automatically detects changes in the vehicle's load and will make adjustments to the air springs as needed
  • Dual-path system inflates 2 air springs independently, allowing for different pressures depending on load
  • Works on any roads, under any load conditions
  • Responsive and accurate to less than 1/16"
  • No air line or wiring needs to be routed into the cab of your vehicle, which eliminates drilling into the firewall
  • No gauges or controller to mess with
  • Kit comes with pre-assembled, weather-resistant wiring harness, 2 height sensors, and 12V compact air compressor with 100 psi
  • Works with Air Lift LoadLifter 5000 Ultimate, LoadLifter 5000, and Ride Control kits
  • 2-Year limited warranty
  • 60-Day money-back guarantee

Note: Can only be installed on vehicles with leaf spring suspension. The sensor installs on the leaf spring or axle.

25491 AirLift Smart Air 2 Automatic Leveling Air Compressor System for Air Helper Springs - Dual Sensor

Replaces 25430

Installation Details AL25491 Installation instructions


California residents: click here



Customer Reviews

Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor - AL25491

Average Customer Rating:  4.8 out of 5 stars   (27 Customer Reviews)


by:

This is a nice product to have on any truck that is used for towing, hauling and really picking up or dropping off anything when your away from a compressor. I was actually able to make this work on a coil spring truck. I mounted the sensors on the frame and the magnets on the top 4-link trailing bar. I would definitely recommend this product over the single sensor kit if your going to be loading the bed a lot with various weighted items. I gave it 4 stars as i had some issues with my passenger side bag not inflating but was able to get that resolved. USE dielectric grease on all of your electrical connections as most people will be mounting it to the underside of their trucks. I would have liked to see this kit come with het shrink terminals or at least some heat shrink for the terminals This kit recommends tapping into circuits that only have power while the key is in the RUN position, I used the sunroof circuit and the heated seats but I did play with the idea of tapping into the headlights as you might be able to control when this system is operational. All in all, its a pretty darn good kit. I like having the dual sensors and that its a set it and forget it system that only kicks in when you need it. Just make sure to do it right the first time and protect your electrical connections.



by:

First set was delivered in horrible condition. Looked like UPS dragged the box from the factory to the delivery behind the truck. Contacted E Trailer and Airlift. Air Lift provided a new set at no cost. Self installed in about 6 hours. Original compressors were under capacity. When truck was loaded compressors got so hot the hoses melted. E Trailer replaced both compressors with upgraded units and they work great.



by:

To be installed 12/6/21. Will update with photos after installation



by:

Works as described- I have this installed on my 2500 Chevy pickup to level while towing... it maintains the level stance even while towing heavy.



by:


Comments
Great. Only issues is the hose pops off the compressor. Needs a clamp and possibly a lager hose. But love this setup.
Jeremy - 04/05/2022

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by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Installed on a 2018 GMC Serra 2500HD.
This
is a comprehensive kit, with install basically compromising three component systems.
1) compressor and the bleed down valve. These I installed on a bed bulkhead just above the front of the muffler. Drive line must be removed. see pic.
2) air bags. I think the instructions show the top mount 180 off. Watch the video, and see pics, easy to install.
3) Electrical, I started from the back with the sensor, compressor, drivers side frame rail following the stock wire loom, which i used to tie the air lift loom. Routed into the engine compartment and up to the fuse box where I used a switched misc fuse and the supplied mini blade spade adapter. passed the wire through a hole i drilled into the cowl side of the fuse lid. Lid has fuse diagram, mine was number 36. This is for the 3 amp inline fuse. Pos and Neg wires wired to battery.
4) air lines, I used the Schroeder valve bracket on the receiver hitch, air line driver side of the spare tire zip tied to frame, see pics.
This took me a full nine hours to install, some wasted time trying to decipher the top mount orientation, which seems to be drawn wrong in the instructions. Watch the video online, helps a lot. I do not think that this was overly complicated, just take each system and install them and tie it all together. I had to do some adjusting on the sensor as initial 5 lbs pressure with the sensor setting caused the compressor to turn on and pumped to 11 PSI. I Just lowered the sensor till I had a pump pressure of seven PSI. Love it.


Comments
One of the best improvements to our 2018 GMC HD2500. We use a 8.5 Sand S camper, and the air bags and onboard compressor keep the truck at stock ride height, so no night time light to high problem. Compressor comes on with the key on whenever the sensor tells it to level. Havent touched it since it was installed, just the way I like it
Craig N - 08/27/2020

by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Had this on my 3500 towing my 5th wheel camper for a year now and it keeps the truck level. It is reliable and smooth riding. Helps handling while towing like I could not believe.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


This airlift smart lift 2 is the best idea yet! I had the wireless one and the module went out. I looked for a replacement and finally decided to just air it up manually.
Then this version became available. Just what I needed. The weak link in the wireless one system is no longer needed. Just load the truck and let the system take care of the rest.
I love it. Thanks Air lift!

Ps. The price match guarantee is a real thing.

Thanks etrailer.com!


Comments
Still loving my air lift auto leveling system. Still working great. Great value. No need to worry about proper amount of air in the bags. It’s automatic. Thanks etrailer.com!
Tracy - 08/12/2021

by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Operations are perfect. I drive 8-10k miles a month and always have a trailer behind me. Constantly changing my loads and the system works great. The pump is Kinda loud but it doesn't bother me.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


I tow a 5th wheel camper & boat around the country in search of great fishing adventures. The Airlift is a necessity for my F-150 Ecoboost. I have met people on my travels that did not have the automatic leveling and they had regretted not getting it after seeing how my truck was self-leveling. It doesn’t matter if I am towing the camper or the boat or just running into town for groceries, my truck level is always perfect for the job at hand. If you’re towing heavy loads, the Airlift 5000 is excellent and I highly recommend the automatic “SmartAir System”. Don’t forget to order your Airlift kit with the Stainless Steel hardware option. I was able to install both kits by myself in a day. The online instructions were very helpful.


Comments
I still love it! We needed some gravel for the yard and I was able to carry 1 1/2 tons with no problems. Don’t forget to upgrade your tires & brakes if you’re going to do this.
Jeffrey - 02/11/2020


by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Great product if your looking for an easy way to keep your truck leveled. Like that the kit is fairly easy to install and I can hook up a trailer and the Smart Air system takes care of the rest.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


After 1 year I am happy to say it has not given a minutes worth of trouble. The truck hauls lumber and construction supplies almost daily and it just does what it is supposed to do without anyone having to do a thing. I have this same system on another truck that has been working for about 10 years now and it also has given no problems. I would not have an airbag setup without this auto leveling system.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


This lift assist works great. I did have to replace the air pump at 10 months old. The warranty covered it all... I have an older one on a PU and it still works great.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


I like the system. Easy to install and very convenient. One problem though. The compressor turns on and off by a magnet being out of center with a sensor. When you hook up, the sensor drops below the magnet, the compressor kicks on and inflated the bags until the sensor is level with the magnet again
then the compressor shuts off. If your load is too heavy, it will never level out and therefore the compressor will never turn off. My compressor burnt within a year of purchasing because of this. Airlift sent me another compressor for free, but it's only a matter of time until this happens again. Airlift doesn't have any data on maximum tongue weight with this system before you have that problem. But I can say from experience that it can't handle 9500 pound tongue weight.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


worked great



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Product works great, instructions included were a little sketchy, and i was missing some parts, so be sure to verify package content before beginning install. cant wait to put it to the test and get my trailer hooked up.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


The kit came with everything that I needed it was an easy install. The The compressor seems a little louder than it should be but I guess that is the design of it.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Amazing shipping times and great produc t!



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


e-trailer proved excellent customer support during a recent back-order. Updates were timely and I was advised that the items were now in stock and shipping.

Excellent vendor...I will use again and would highly recommend them to anyone.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Works as designed



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


GREAT COMPANY,VERY FAST SHIPPING,GREAT PRODUCTS.



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit


Price was good free shipping and it arrived in two days the install was not difficult



by:

Review from a similar SmartAir II in Air Suspension Compressor Kit



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Show More Reviews

Ask the Experts about this Air Lift Air Suspension Compressor Kit



  • Can Air Lift SmartAir II Leveling System Be Installed On 2018 Ram 1500 W/ Rear Coil Springs
    Yes, the Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor # AL25491 you were looking at can still be installed on your 2018 Ram 1500 with Air Lift Load Lifter 5000 Air Helper Springs installed. Since your truck has rear coil springs instead of rear leaf springs you will just need to find a mounting location for the sensor that allows the height sensor and the magnet to be 1" - 1-1/2" apart when at ride height. I included a link to the written...
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  • Will the Air Lift SmartAir II Automatic-Leveling Compressor System Fit a Ford F-250
    The Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs part # AL25491 is a universal air compressor system. It simply requires a leaf spring suspension therefore, there should be no issues installing on a Ford F-250.
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  • Replacement Height Sensor Recommendation for Air Lift SmartAir II Automatic Compressor
    The part number you are looking for is the # AL72118 which is the replacement height level sensor for the Air Lift SmartAir II Automatic-Leveling Compressor System # AL25491.
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  • Could Air Lift SmartAir II Leveling Compressor Kit Be Used on 2019 Ram 2500
    Yes, you can use the Air Lift SmartAir II Automatic-Leveling Compressor System # AL25491 on your 2019 Ram 2500 with coil spring rear suspension. You'll need an air bag kit installed on the vehicle as well like the part # AL57289 which is the correct kit for your truck and provides it with up to 5,000 lbs of additional suspension support.
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  • Can The Air Lift SmartAir Magnetic Sensor Be Added To My Firestone Air Springs And Compressor
    I spoke with a representative from Air Lift and he did say that you would be able to add the sensor(s) to your existing pump setup. However, he did indicate that it would take more that just the installation of the sensor to make this work for you. He suggested that you get the Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Single Sensor, part # AL25490, because you will have to use everything except for the air compressor to make this work in your system....
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  • Compatibility of Air Lift Compressor System with Kelderman Rear Air Suspension on Ram 2500
    The Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor # AL25491 is not vehicle specific, so it can be used on your vehicle. The Kelderman suspension has not been tested with this compressor so I can't confirm the fit. If the pressure and fittings align it doesn't give any reasoning why it wouldn't, but this has only been tested and confirmed to work with aftermarket air bags that are supplemental to the factory suspension.
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  • Is Air Lift SmartAir II Compressor System Compatible with AirLift 1000HD Air Helper Springs
    Yes, the Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs # AL25491 that you referenced is compatible with the Air Lift AirLift 1000HD Air Helper Springs # AL60818HD that you referenced. The compressor system automatically levels your vehicle using a unique non-contact magnetic height sensor, which allows the system to intelligently determine whether the air springs should be inflated or deflated
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  • Recommended Wireless Compressor System for Heavy Duty Air Bags on 2020 Ford F-450
    Yes; the Air Lift WirelessONE Compressor System for Air Helper Springs - Remote - Bluetooth - EZ Mount # AL25980EZ comes with an upgraded heavy duty compressor that will work well on your 7500XL air bags. The only drawback to this system is that it's a single path system. However, you could also use the Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor # AL25491 if you want to have the ability to inflate the bags individually for other towing...
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  • Air Springs Compatible With Air Lift Automatic-Leveling Compressor System on 2016 GMC Sierra 2500
    The Air Lift SmartAir II Automatic-Leveling Compressor System # AL25491 is compatible with Air Lift LoadLifter 5000 Ultimate, LoadLifter 5000, and Ride Control kits from Air Lift. For your 2016 GMC Sierra 2500, so long as your truck is a Heavy Duty (2500HD) model, the Air LIft Air Springs that fit are: - Air Lift LoadLifter 5000 Air Helper Springs # AL57338 - Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers # AL88338 Of these two kits I recommend the...
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  • Dual Path Compressor System with Mobile Device Control
    There is a dual path compressor system that offers the ability to be controlled by a mobile device. I recommend you just take a look at the Air Lift WirelessAIR Compressor System for Air Helper Springs - Remote - Bluetooth # AL74000. The wireless remote included with this system is an option, but the ability to pair with your mobile device is also an option. We also have the Air Lift SmartAir II Automatic-Leveling Compressor System part # AL25491 which is dual path and as the title states...
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    If you had a set of air helper springs installed on your 2015 Toyota Tundra like the part # AL88299 the Air Lift SmartAir Automatic-Leveling Compressor System # AL25491 that you referenced would work for you as it can sense changes in cargo weight and compensate automatically by inflating or deflating the air bags. I attached a link to the install instructions for you to check out as well. There will be some drilling required for install.
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    The Air Lift LoadLifter 5000 Air Helper Springs part # AL88212 is what I recommend for a 2005 Ford F-350. The airbags will do a great job of helping provide support when towing or hauling without sacrificing ride quality. They will also work great with the Air Lift SmartAir II Automatic-Leveling Compressor System part # AL25491.
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    For your 2002 Chevy Express 3500 DRW Express Cutaway Van you'll want the Air Lift LoadLifter 5000 Air Helper Springs - Rear Axle # AL57205 and the Air Lift Load Controller Compressor System for Air Helper Springs- Heavy Duty - Dual Path # AL25856. The Air Lift LoadLifter 5000 air springs provide your vehicle with up to 5,000lbs of load-leveling support, reducing strain on your rear suspension and improving both safety and ride quality, especially in your case where you're loading up heavy...
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  • Is Air Lift Compressor Kit # AL25491 Compatible with Firestone Air Bag Kit
    Yes, the great thing about the compressor kits like the Air Lift SmartAir II Automatic-Leveling Compressor System # AL25491 that you referenced is that they work on basically all styles of aftermarket air bag kits since they all use the same style of air tubing and fittings.
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  • Dual Path Air Compressor Kit for Suspension Enhancement that Can Inflate Tires as Well
    We have really great compressor options that have ability to inflate vehicle and trailer tires as they come with tanks and air lines/chucks but the # AL25491 would not work for this. For that we have the Air Command II Compressor System w F3 Wireless Remote, Xtreme Duty Compressor, Tank, Hose # F2592 which comes with everything you'd need and is also dual path so you could inflate one set of air bags to a different pressure than the others as well.
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  • Is The Air Lift Auto-Leveling Compressor Compatible With Air Lift 7500 XL Air Bags.
    The Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor # AL25491 is compatable with the Air Lift LoadLifter 7500 XL Air Helper Springs - Rear Axle # AL57577. Both the compressor and the bags have a max PSI of 100 so you need not worry about over-inflating or under-inflating. Make sure you always keep at least 5 PSI in the bags at all times. This will keep them working and prevent premature wear and tear.
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  • Recommended Air Lift Air Spring System and Compressor for 2019 Ford F-450 Dually
    For your 2019 Ford F-450 DRW we have the Air Lift LoadLifter 5000 Air Helper Springs # AL57399, the Loadlifter 5000 # AL88399 with the internal jounce bumpers, and # AL89399 which features the internal bumpers along with stainless steel hardware and lines. Going with the stainless steel option ( # AL89399) is a great idea to ensure a long-lasting system because the lines, hardware, and roll plates will be resistance to rust and corrosion over time. The air springs have a 5,000 pound load-leveling...
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  • Does Air Lift SmartAir II Compressor System AL25491 Include Helper Springs?
    The Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs # AL25491 you were looking at includes the compressor, auto leveling sensors, and tubing, but does not include the helper springs. Since you have a 2013 Chevrolet Silverado you will need one of the following options: Air Lift # AL57204 if you have a 1500 that does NOT have the 8' bed, the # AL57211 if you have a 1500 with a 8' bed, or the # AL88338 if you have a 2500/3500. I included videos of the products...
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  • Air Helper Springs and Automatic Compressor For 2017 Ram 1500 Laramie
    I recommend to use the Firestone Coil-Rite Air Helper Springs part # F4185 for the 2017 Ram 1500 Laramie without factory air ride. The Firestone bags are considered to be a higher quality construction compared to the other brands. The bags install inside the coil springs of the rear suspension to help level out the truck. For an air compressor, Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs part # AL25491 which can be used on the Firestone air bags. It...
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  • Can I Use the Air Lift LoadLifter 5000 # AL89275 on My 2018 Ford F-250 FX4
    You will not be able to move the Air Lift LoadLifter 5000 Ultimate Plus Air Springs w/ Internal Bumpers - Stainless Steel - Rear Axle # AL89275 from your old 2005 Silverado 3500 to your new 2018 Ford F250 FX4. The # AL89275 will not be compatible with your new truck. The correct air lifter for your 2018 Ford F-250 FX4 will be the Air Lift LoadLifter 5000 Ultimate Plus Air Springs w/ Internal Bumpers - Stainless Steel - Rear Axle # AL89399. If you also wanted to add a compressor system,...
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  • Air Suspension System That Also Can Be Used to Fill Tires?
    I have a solution for you, but I talked to my contact over at Air Lift about this and it really is not a cost effective solution because it would involve purchasing an additional tank and air compressor system to replace the system that is included, as well as wiring in solenoids, low pressure switches and re-wiring the system. The AirLift # AL25491 is a great system because it provides individualized inflation to each air bag in the system, but you would spend considerably more in parts...
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