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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 Air Suspension Compressor Kit - AL25491
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Product Images


  • Air Lift
  • Dual Path
  • Automatic Leveling
  • No Display
  • 100 psi
Call 800-298-8924 to order Air Lift air suspension compressor kit part number AL25491 or order online at etrailer.com. Free expert support on all Air Lift products. Guaranteed Lowest Price and Fastest Shipping for Air Lift SmartAir II Automatic-Leveling Compressor System for Air Helper Springs - Dual Sensor. Air Suspension Compressor Kit reviews from real customers.


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  • Reviews (6)
  • Q & A (7)
  • Videos (1)
  • Photos
  • Why etrailer?

Air Lift Air Suspension Compressor Kit - AL25491


  • 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

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

Replaces 25430



AL25491 Installation InstructionsInstallation Details AL25491 Installation instructions


California residents: click here


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


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Air Lift Air Suspension Compressor Kit - Automatic Leveling - AL25491

Today we're going to go over what comes in the kit for the Air Lift Smart Air 2, automatic leveling compressor system, for the Air Helper Springs with dual sensor. So basically this kit is just a double up of the system from Air Lift. It's going to have two of everything. So we'll get two compressor units, two lengths of air hose, two wiring harnesses, our sensors themselves, the T-relay to go between our airbag, and the compressor itself. Brackets, hardware we'll have our T's, our two magnets, all of the wiring and all of the nuts and bolts that we'll need to get everything installedTwo fuse holders to go in line with the power to the battery. And then two fuses to go intp those fuse holders.

So basically the idea with this system is that it's going to automatically detect any change in the vehicle's load and make adjustments from there as needed. So if you're at your regular ride height it'll stay there. As soon as you put a load into your truck, the system will detect that squat happening in your axle, and then lift the air bags accordingly.There's no need to run your airlines, or wiring into the cab of your vehicle. It's all going to stay beneath the vehicle, just between the airbags and the compressors themselves, and that eliminates any need to drill into the firewall, which can always be a tricky situation. There's also no gauges or controller to mess with.

It's all going to be handled automatically. You really don't have to make any adjustments to it, other than that initial adjustment to get the right height that you want.The kit comes preassembled with our wiring harness, so you basically just have to unwind it, and hook it all up. It's going to have our two height sensors again, and that 12 volt compact air compressor with a max capacity of 100 PSI. And it works with the Air Lift Load Lifter 5,000 Ultimate, the Load Lifter 5,000, and the ride control kits, all of those are available here at etailer.com if you want to get one for your vehicle in particular. This system is very responsive and is going to be accurate to less than 1/16 of an inch.

So once you get your ride height dialed in, it's going to stay very accurate to that.So even if you have an offset load, like if you have an in truck bed camper, and it's kind of leaning to one side, it'll correct for that as needed without you having to go and measure and change the air pressure yourself. It'll have that dual path system, so we can inflate both of our air springs independently. And that's a nice thing about having the dual system, or dual sensor system rather than a single sensor, since whatever you do that you pretty much just have both of your airbags connected them together, and they'll raise and lower the truck is needed. But if it's off center side to side, you don't really have an adjustment there.So that's why it's great to have both sensors for both sides of your truck to get that as level as possible for your vehicle. I mean, this is going to be a great addition to your vehicle.

It comes with pretty much everything that you're going to need to get all those connections made, and to make your towing experience that much better. This comes with a two year limited warranty from Air Lift, and a 60 day money back guarantee from them as well. That's going to do it for our look at the Air Lift Smart Air 2 automatic leveling compressor system for air helper springs.


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   (6 Customer Reviews)


- AL25491
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. 599775



- AL25490
by:

Review from a similar Air Lift 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. 630990



- AL25490
by:

Review from a similar Air Lift 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. 602262



- AL25490
by:

Review from a similar Air Lift 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. 598645



- AL25490
by:

Review from a similar Air Lift 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. 547025



- AL25490
by:

Review from a similar Air Lift 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. 485755


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Ask the Experts about this Air Lift Air Suspension Compressor Kit
Do you have a question about this Air Suspension Compressor Kit?


  • 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.
    view full answer...

  • 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...
    view full answer...

  • 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
    view full answer...

  • 2004 Ford F-250 Air Bag and Compressor with Reserve Tank for Airing Tires
  • We have AirLift rear-axle air spring kits for both the 2WD and 4WD versions of the 2004 Ford F-250 Super Duty pickup. These kits vary in their weight ratings and some will be compatible with a 5th wheel hitch installation while others will not. Installation notes indicate this. All AirLift kits appear on the linked page. You can click on either 2WD or 4WD at the top of the page to limit the displayed results to kits that will fit your specific truck. For example, if you have a 4WD...
    view full answer...

  • Air Bag and Compressor Suspension Enhancement for a 2015 Toyota Tundra
  • 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.
    view full answer...

  • 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...
    view full answer...

  • Dual Path Compressor System with Mobile Device Control
  • There are no dual path compressor systems that we offer with the ability to be controlled by a mobile device. Instead, I recommend you just take a look at the Air Lift WirelessAIR Compressor System for Air Helper Springs part # AL72000. The wireless remote included with this system is small so it is easy to store and it has a long battery life so you don't have to worry about it going dead when you need it but it is always a good idea to keep some spare AAA batteries on hand. We also...
    view full answer...


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Info for this part was:

Edited by:
Leah B
Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Kathleen M
Written by:
Mary E
Updated by:
Sarah W

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