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Welcome to the Dunlop range of auxiliary air suspension kits. You’ll find a wide range of solutions available to suit a multitude of vehicle variants.

Auxiliary air suspension is fitted in tandem with the standard steel springs of the vehicle suspension, and provides enhancements in terms of both the stability of the vehicle and the comfort of the passenger:

  • Vehicle Levelling

    Simply by varying the air pressure in the springs, the vehicle can be levelled both front-to-rear and side-to-side. Keeping the vehicle level optimizes stability, ensures correct headlamp beam distribution and reduces tire wear arising from uneven distribution of weight.

  • Straight Line Stability

    Straight line stability is greatly increased at higher speeds, and when subjected to buffeting from cross-winds or large overtaking vehicles.

  • Reduced Body Roll

    Body roll when cornering or negotiating roundabouts is significantly reduced.

  • Fatigue Reduction and Wear Compensation

    Suspension fatigue is reduced, so helping to prevent leaf springs form sagging under repeated or constant loading. Any sagging already present can be compensated-for. This is a particular benefit for motorhomes, which are always fully laden.

  • Ride Comfort

    Air springs help to absorb shock loads from uneven road surfaces, therefore general ride quality is much improved.

… and furthermore…

  • Dunlop is an internationally recognized brand.
  • Dunlop is an air suspension specialist with a history spanning more than 50 years, supplying in excess of 250 000 air springs a year.
  • Each system offered is optimized in terms of comfort and flexibility, by designers drawing from an extensive range of air springs and bellows.
  • Double and triple convolute bellows are capable of operation at relatively high pressure, enabling a correspondingly high axle load to be supported and offer an extended suspension stroke, so providing a wide adjustment range of vehicle required.
  • Auxiliary air suspension systems are fitted relatively quickly and easily, with no welding or drilling required.


Every effort has been made to ensure the accuracy of the information provided in the digitalized catalogue in respect of original equipment manufacturer vehicle data. However, DSC Nederland shall not be held liable for any inaccuracies that may be contained herein.

Gross Vehicle Weight (GVW)

Air assist kits are not in themselves designed to increase the gross vehicle weight (GVW) rating of a vehicle. They do not legally allow for carriage of a load greater than the carrying capacity stated on the data plate of the vehicle. Do not exceed the maximum load specified by the vehicle manufacturer

  • to avoid compromising passenger safety
  • to prevent possible damage to the vehicle
  • for legal reasons

Load Sensing Valve (LSV) Adjustment

If your vehicle is not fitted with an antilock braking system (ABS) then it will have a load sensing valve (LSV) to automatically adjust braking force under varying load conditions. This valve must be adjusted immediately after the fitting of an air assist kit and before the vehicle is driven again on public roads.

If the LSV is not adjusted following the fitting of an air assist kit, it may misjudge rear load conditions to the extent that the braking pressure applied to the rear brakes is not correct (e.g. the rear wheels may lock with no load on the rear axle). The consequences of this in terms of vehicle stability and safety are potentially serious.

Vehicle Uprating

Despite the above words of caution, it is possible to upgrade the weight rating of your vehicle. This must be carried-out by a specialist supplier that will:

  • carry out any necessary modifications in addition to fitting the air assist kit
  • complete documentation as necessary to inform the Vehicle and Operator Services Agency (VOSA) - a mandatory requirement
  • supply and fit a new weight plate to replace the original plate supplied with the vehicle. This process applies to United Kingdom registered vehicles. The process in other countries may be different.


The system does not require very much maintenance other than:

  • to maintain air pressure in the springs. Much like a tire, the system may lose a little air over time.
  • to keep the air bellows clean. It is suggested that, when washing the vehicle, the bellows are inspected and cleaned as necessary. Look in particular for stones or grit trapped between convolutes, as this may damage the bellow.

Safety Guidance Note

The following very useful guidance note is available for free download from the Health and Safety Executive (HSE)… PM85, July 2007 Safe recovery (and repair) of buses and coaches fitted with air suspension The URL for this document is:

Guide to the catalog

The catalog of the Dunlop air assist products consist of three main subjects:

  • Air assist kits. Here you will find all available air assist kits with our program specified by make, model and building year. Please note the important instructions concerning the Dunlop AL KO air assist kits.
  • Inflate Options. Here you will find all available inflating options additional to the range of air assist products. Please note a wide range of different specified dashboard panels available for Option 1, 2 and 3.
  • Air Suspension Parts. Here you will find all additional and / or spare parts available concerning the range of Dunlop air assist products.

Please find here a key of all listed icons used in this catalog:


Motorhome / Van



Axle through the chassis

Axle under the chassis

Axle under the chassis

Square axle

Round axle

Reinforced square axle

Reinforced round axle

Front Wheel Drive (FWD)

Rear Wheel Drive (RWD, Single Wheel

Rear Wheel Drive (DRW), Dual Wheel

Tandem Axle

Four Wheel Drive (4WD)

Four Wheel Drive, Dual Rear Wheel


Air Bellow, single convolute

Air Bellow, double convolute

Air Bellow, tripple convolute

Air Spring

Inside Diameter



Suitable for


Height Extension










To complement the extensive range of auxiliary air suspension solutions for conventionally-suspended vehicles, shown on the remaining pages of this catalogue, There are different Dunlop kits suitable for vehicles fitted with an AL-KO (Alois Kober) galvanised steel chassis (all variants 1994 to present and for double rear axles tandem). One of the greatest advantages of choosing a Dunlop kit for the AL-KO chassis is short installation time - there is no need for disassembly of either the drum or disk brakes. This makes possible an installation time for suspension parts of less than 2 hours. Starting from 1994 there are different types of air suspension available. depending on model and building year. All of these kits are designed for Fiat, Citroen and Peugeot vehicles. For Renault, Volkswagen Karmann, Opel and Vauxhall the kits are not suitable. Tandem axles can need some modification.

VERY IMPORTANT! All our AL-KO air suspension kits are not suitable for “Up Going Chassis’’!

In order to take full advantage of Dunlop AL-KO kits, it is prescribed that inflation Option 2 or Option 3 is chosen

Recognition of the different AL-KO arrangements *

1994 - 2002
Bottom end connected to suspension arm
Welded to suspension arm
1994 - 2002
Bottom end connected to suspension arm
Welded to suspension arm
2002 - 2007
Top end connected to suspension arm
Large, Steel alloy incl. jacking point
2007 - Present
Top end connected to suspension arm
Small, Steel, Welded
2007 - Present
Top end connected to suspension arm
Small, Steel, Welded
2010 - Present
Bottom end connected to suspension arm
Small, Steel, Welded


For decades DSC Nederland has been manufacturing Dunlop air suspension for motorhomes, vans, and pick-ups. Every air assist kit consists of specially designed strong steel fasteners and large, strong air bellows that can be operated independently.

The PLC air assist kit is fitted in tandem with the standard steel springs of the vehicle suspension, and provides enhancements in terms of both the stability of the vehicle and the comfort of the passenger.

General Instructions
AL-KO Instructions
Download Manual