The Airbag Man CR5104HP is a high pressure polyurethane air spring built to fit inside the factory 120mm ID rear coil spring on Jeep Wrangler JK models (2007-2018 Australian delivery). It adds up to 1500kg of adjustable load support via air pressure, so you can dial in support for a bull bar, winch, drawers or a loaded trailer without touching your unladen ride height. It pairs well with a rear coil spring upgrade if you're carrying weight permanently rather than intermittently. Backed by Firestone's manufacturer warranty on the air spring, in stock in Australia with fitment support from our team.
Browse all compatible suspension parts for your Helper Kit Jeep Wrangler Jk using our parts finder.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Jeep | Wrangler | JK / JK Unlimited | 2007-2018 | 3.6L Pentastar Petrol, 2.8L CRD Diesel |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page.
This helper kit works with your existing factory rear coil spring rate rather than replacing it, so spring rate selection isn't required — you're adding adjustable air support on top of the standard coil. If you're carrying a permanent load such as a canopy, drawer system or long-range fuel tank, a dedicated raised rear coil spring may suit better than an on-demand air helper. Common accessories that push buyers toward this kit include tow bars, occasional camper trailers, roof top tents and rear bar work — loads that come and go rather than sit permanently on the vehicle.
Fitting the air spring inside the factory coil requires the coil spring to be compressed and removed, so this is best handled by an experienced DIY installer with a spring compressor or by a workshop. Once fitted, run the air line to an accessible inflation point and set pressure to suit your load — there's no fixed setting, you adjust it trip to trip. Wheel alignment isn't required from this kit alone since ride height at rest doesn't change, but check alignment if you've also fitted other suspension components. If you're planning a permanent lift alongside this kit, look at control arm upgrades to correct front-end geometry.
Airbag Man builds its air springs using Firestone rubber components, backed by Firestone's manufacturer warranty on the airbag itself. The brand focuses on load-assist suspension for Australian tow vehicles and 4WDs, sold through 4WD Suspension with local stock and fitment support. Explore the full Airbag Man range for other vehicle-specific helper and full-replacement air spring kits.
This kit suits Wrangler JK owners running a rear bar, drawers or a trailer only some of the time, who want support without stiffening the ride when unladen. It's a practical option for tourers and tradespeople who need airbag suspension that can be dialled up for a loaded trip and dialled back down for the daily commute.
In stock in Australia and dispatched fast, with fitment support from our suspension team on every order. Browse our full lift kit range if you're after a permanent height and load solution instead, or use our parts finder for the Wrangler to check every compatible suspension part.
New to Jeep suspension? Read our guide to common Jeep suspension problems and how to fix them.
The CR5104HP is designed for Jeep Wrangler JK and JK Unlimited models from 2007 to 2018 fitted with a 120mm ID rear coil spring. It's not a universal fit — check your factory coil spring's inner diameter before ordering, especially if you've already fitted a different coil. If you're unsure, our team can confirm fitment against your build details before you buy.
This is a load-assist helper kit, not a lift kit — it doesn't raise your unladen ride height. It fits inside your existing factory rear coil spring and adds up to 1500kg of adjustable load support via air pressure when you inflate it. If you're after an actual height increase, look at our dedicated raised coil spring or full lift kit options for the JK.
The CR5104HP kit includes 2 x Airbag Man high pressure air springs sized to a 120mm ID, upper and lower mounting components, an air line kit with an accessible inflation point, and fitting instructions. It's backed by Firestone's manufacturer warranty documentation on the air spring itself. A compressor and gauge are not included and are sold separately.
Yes, that's exactly what it's built for. When you're towing or carrying a load that sags your rear coil spring, you inflate the air spring to add support and reduce sag, then deflate it again for unladen driving. It works alongside your factory or upgraded rear springs rather than replacing them.
No, this helper kit doesn't require control arm changes since it doesn't alter your ride height or suspension geometry. Control arm upgrades are only relevant if you're also fitting a permanent lift kit that changes pinion angle or axle position. If you're combining this kit with a lift, our team can advise on whether control arms are needed for your setup.
Wheel alignment isn't required from installing this helper kit alone, because unladen ride height and suspension geometry stay the same. If you've fitted other suspension components alongside it, such as a lift kit or new coil springs, get an alignment done as part of that install. Always check alignment if ride height or camber has changed from any other work.
This kit doesn't replace your coil spring rate — it adds adjustable air support on top of your existing factory coil. If you want a different permanent spring rate for a heavier constant load, look at our JK-specific rear coil spring options instead. The two products solve different problems: coils handle constant load, this kit handles occasional load.
Since this is a load-assist kit and not a lift kit, it won't change your ride height or wheel arch clearance. Tyre size fitment for your JK depends on your existing suspension setup, not on this product. If you're planning larger tyres, check our lift kit range for options that actually raise ride height and clearance.
The air spring component is backed by Firestone's manufacturer warranty, as Airbag Man uses Firestone-manufactured air springs in this kit. Keep your proof of purchase and installation details on file, as these are typically required for any warranty claim. Contact our team if you need the specific warranty terms in writing before you buy.
Yes — you deflate the air spring for daily unladen driving so ride quality stays close to factory, and inflate it only when you're carrying extra load. This on-demand approach is the main advantage over a fixed heavier coil spring, which stays stiff whether you're loaded or not. It suits JK owners who tow or load up only some of the time.
Help other 4WDSuspension users shop smarter by writing reviews for products you have purchased.
Add your favourites to cart
Log into or create your Afterpay account, with instant approval decision
Your purchase will be split into 4 payments, payable every 2 weeks
All you need to apply is to have a debit or credit card, to be over 18 years of age, and to be a resident of country offering Afterpay
Late fees and additional eligibility criteria apply. The first payment may be due at the time of purchase
For complete terms visit afterpay.com/terms
