Air Suspension Kits with Fitting Position Front and Rear, Front Axle

An air suspension kit supplies everything needed to add air springs to a vehicle, either alongside the existing springs or in place of them.

Kits exist because the individual components have to be matched to work together properly. Air springs, mounts, lines, fittings and controls all need to suit each other and the vehicle, and buying them separately is how people end up with parts that do not fit.

What Is in an Air Suspension Kit

Contents vary by system, though a complete kit is designed so that everything needed for the installation arrives in one box.

The air springs themselves are the core of it, supplied as a pair, with vehicle specific mounts and brackets that locate them correctly on the axle and chassis. Fasteners suited to those mounting points are included rather than left to you to source.

Nylon air line tubing carries air to each spring, and kits sold in Australia use metric tubing with matching air fittings. Inflation valves let you add or release pressure, with one per side on most systems so each air spring can be set independently.

Detailed fitting instructions and an operation manual come with a complete kit, and both matter more than they sound. Operating heights and maximum pressures are specific to each kit, and the manual is where those figures live.

Beyond the basics, systems can add an onboard compressor so the vehicle carries its own air supply, a cabin mounted control panel with pressure gauges, and independent control of each side so an unevenly loaded vehicle can be corrected from the driver's seat.

Accessories including compressors, air lines and replacement air springs are available separately, since these are serviceable items on a system that has been fitted for years. An air spring that has been inflating and deflating for a decade is a wear item like any other, and replacing one does not mean replacing the whole system.

Full Air Suspension Kits or Helper Airbag Kits

The distinction decides what you are buying and it is not always obvious from a product name.

A helper airbag kit works with the springs already on the vehicle. The coil or leaf continues to carry the load and the air spring adds support on top when it is needed. At low pressure the vehicle drives close to standard, and pressure goes up when the load does.

A full air suspension kit replaces the coil spring entirely with a heavy duty air spring of the type used on trucks. The air spring carries everything, which gives full height adjustment rather than load assistance, and it is what people choose when they want to raise or lower the vehicle rather than simply support it.

Full kits offer more adjustment and more capability, including the ability to lower the vehicle for a more settled stance and easier access. Helper kits are simpler, cost less, and are what most towing and load carrying situations actually call for.

Benefits of an Air Suspension Kit

The gains are consistent across systems, and they follow from one thing: a vehicle sitting at its designed ride height behaves the way its engineers intended.

• Eliminates spring sag, so a loaded vehicle sits level rather than dropping at the rear
• Adjustable ride height, raising the vehicle for ground clearance or lowering it for access
• Improves steering and braking by keeping weight properly distributed across both axles
• Improves stability and handling, and reduces vehicle sway under load
• Restores suspension travel that a sagging vehicle has already used up
• Helps prevent bottoming out, since pressure can be added before the load goes in
• Enhances ride comfort by absorbing bumps and vibrations that a compressed spring transmits straight through
• Excellent ride quality when empty as well as loaded, because pressure comes back down
• Safer load carrying through better weight distribution and predictable handling
• More even tyre wear, since weight sits across all four tyres as intended
• Reduces wear and tear on shocks, bushes and other suspension components by spreading load
• Makes loading and unloading easier on systems where ride height can be dropped
• Suits standard, lowered and raised suspension setups depending on the kit chosen
• Simple to fit and maintain, with no ongoing servicing beyond checking pressures and fittings

The tyre point is worth expanding on, because it is the one people underestimate. A vehicle sitting nose high runs its rear tyres on the inner edges and its fronts lightly loaded, and that wears a set unevenly long before the tread is genuinely finished. Levelling the vehicle spreads the load and the tyres last as they should.

Air Suspension Kits for Towing and Caravans

Towing is the most common reason Australian drivers fit these.

Ball weight sits behind the rear axle, which means it works as a lever. The rear settles, the front lifts, weight comes off the steering and braking end of the vehicle, and stability suffers exactly when it matters most. A loaded vehicle that sags also has less travel available, so every bump is absorbed by a suspension already partway through its range.

Adding pressure brings the rear back to level. Weight returns to the front wheels, the vehicle tracks straighter, steering and braking regain their feel, and the suspension has travel available for road irregularities rather than sitting compressed before you leave the driveway.

The same applies across caravans, camper trailers, boat trailers and plain box trailers, since the mechanism is ball weight rather than what is attached to it. Vehicles carrying rather than towing benefit for the same reason, whether that is a loaded tray, a canopy and drawer system, or tools and stock during the week.

Worth stating clearly: an air suspension kit levels the vehicle and helps it carry its rated load properly. It does not increase GVM, GCM or towing capacity, and it is not a substitute for correct weight distribution in the van.

What an Air Suspension Kit Does Not Include

Worth knowing before the vehicle goes in, because a few things are commonly assumed to be in the box and are not.

Compressors and cabin control panels are separate on most helper kits. The base kit gives you air springs, mounts, lines and inflation valves, which you top up with a tyre inflator or a portable compressor. Onboard air is an upgrade rather than a default.

Gauges follow the same pattern, since a basic kit relies on a tyre pressure gauge at the valve while a cabin mounted gauge forms part of a management system.

Shock absorbers are never included, and this matters more than people expect. Air springs change how the vehicle sits and how much it can carry, and the shocks still have to control all of it. A vehicle with tired shocks and new air springs will still float and wallow, because the spring is not the part damping the movement.

Heavier duty shocks are often the sensible companion purchase on a vehicle that tows or carries weight regularly, and it is worth asking about them at the same time rather than fitting the kit and being disappointed.

Air Suspension Kit Fitment and Ride Height Options

Kits are built for specific vehicles rather than sold universally, and one size genuinely does not fit all.

Air suspension kits are available for cars, utes, cab chassis, wagons, vans, trucks, 4WDs, trailers, caravans, camper trailers and boat trailers, and the kit for each is built around that application's mounting points and loads.

Body style matters within a single model, because a ute, a cab chassis and a wagon on the same platform have different rear ends. Year ranges matter, since manufacturers change spring seats and chassis rails mid model. And on many applications the kit differs depending on whether the vehicle sits at standard height, has been lowered, or already runs raised aftermarket suspension.

That last point catches a lot of people out, because a kit designed around standard ride height fitted to a vehicle with a two inch lift will not sit correctly. The air spring has a working height range, and a lift has already moved the suspension outside it.

Every kit specifies its airbag operating heights and maximum pressures. Check those against how your vehicle actually sits rather than how it left the factory, and check the vehicle listing rather than assuming a kit for a similar model will transfer.

Choosing the Right Air Suspension Kit

Most wrong purchases come down to four questions that take a minute to answer.

What does the vehicle carry, and how often does it carry it? A permanently fitted canopy and drawer system is a different problem to a trailer twice a year, and the answer decides whether manual inflation is enough or cabin control earns its cost.

What is the ball weight when you are hitched up? That figure tells you how much support the rear actually needs, and it is more useful than the van's total mass.

Is the load even from side to side? Long range tanks, drawer systems and water tanks are rarely central, and an unevenly loaded vehicle benefits from independent control of each air spring.

How is the rest of the suspension holding up? Air springs will mask tired shocks or sagging springs rather than fix them, and a vehicle with worn components underneath drives better for having those sorted first.

Different vehicles, towing weights and load types genuinely demand different setups, which is why we would rather talk it through than take an order for the wrong system.

Air Suspension Kit Installation

Kits are designed to be straightforward to fit, and fitting quality still decides whether a system lasts.

Air lines need routing away from heat, away from moving suspension and away from anywhere they can chafe. Mounts need to sit square so the air spring inflates without rubbing. Clearance needs checking through the full range of suspension travel rather than at ride height. Fittings need to seal properly, because a slow leak in an air system is difficult to trace later.

Where a compressor is fitted, it needs mounting somewhere dry, accessible and protected, which on a 4x4 that sees water crossings is a decision worth getting right the first time.

Once fitted, maintenance amounts to checking pressures periodically and inspecting the lines and fittings when the vehicle is serviced. There is nothing to rebuild and no scheduled replacement.

Fulcrum has been fitting suspension since 1976, with 16 Service Centres across Australia and 200+ authorised workshops. Having the kit fitted, pressure tested and set up for how your vehicle is actually loaded is what the network is there for.

Find Air Suspension Kits for Your Vehicle

Select your vehicle to see the air suspension kits available for it, including helper airbag kits and full air suspension systems, or talk to your nearest Service Centre about which suits the way you load and tow. Everything we supply is backed by our warranty, a fitment guarantee and the support of a nationwide workshop network.