Fitting, diagnostics and repair for motorhomes, light commercials and 4x4s, for private owners, dealers and fleet operators.
Motorhome, Van & 4x4 Air Suspension Workshop — Ongar, Essex
We specialise in air suspension for motorhomes, vans, light commercials and 4x4s. We don't repair factory-fitted (OE) air suspension on passenger cars.
On Air Suspension is an air suspension specialist operating a dedicated workshop at our base in Ongar, Essex. All air suspension kits supplied by On Air are available for professional fitting at the workshop, including semi-air kits, full-air conversions and OE replacement systems. We also repair and service existing systems on motorhomes, vans and light commercials, including OE factory-fitted systems, covering leaks, compressor faults and height control issues.
We fit and service air suspension on light commercial vehicles, including Mercedes Sprinter, Ford Transit, VW Crafter, Iveco Daily and Isuzu chassis up to 7.5t, as well as specialist conversions such as ambulances, welfare vehicles, refrigerated bodies and tail-lift builds. Light commercial vehicles
Motorhome Air Suspension Repair & Servicing
We carry out air suspension repair and installation for motorhomes including large, tag-axle, A-class and 5t+ coachbuilt motorhomes at our Ongar, Essex workshop. Whether you have a fault on an existing aftermarket kit or a factory-fitted OE system, our team can diagnose the problem and carry out the repair using parts we supply and stand behind.
Common faults include leaking air springs, compressor failure, height sensor issues and loss of ride height control. If your motorhome is sitting low at the rear, losing height overnight or the compressor is running continuously, get in touch to book a diagnostic appointment.
Semi-Air Suspension Fitting
Semi-air suspension kits for motorhomes, campervans, pickups, commercial vehicles, low loaders, Luton bodies and car transporters. Works alongside existing suspension — nothing removed.
Full-Air Suspension Conversion
Full 4-corner and rear air suspension conversions for Land Rover Defender, Ineos Grenadier, Ford Ranger and more. Designed and built in-house.
OE Replacement & Repair
Diagnostics, repair and OE replacement for factory-fitted air suspension systems. Fiat Ducato, Renault Master, Mercedes Sprinter, VW Crafter and more.
Diagnostics & Repair
If your existing air suspension system is developing faults — compressor running constantly, leaking air springs, height sensor issues or loss of ride height control — our team can diagnose, service and repair the system at the workshop. We work on OE factory-fitted systems on motorhomes, vans and light commercials, as well as aftermarket kits.
How It Works
On Air Suspension operates a supply and fit service. All parts are supplied by On Air as part of the fitting — we do not fit customer-supplied parts. This ensures every installation uses components we know, trust and stand behind.
Fitting costs are quoted on enquiry — there are too many variables across vehicle types, kit specifications and configurations to publish a standard price list. Contact us for a quote.
Typical lead time: Subject to availability, typically 1–3 weeks.
We work with private vehicle owners, motorhome dealers, fleet operators and commercial customers.
Do you fit parts I've bought elsewhere?
No — we operate a supply and fit service only. All parts used in fitting are supplied by On Air Suspension as part of the job, so every installation uses components we know, trust and stand behind.
Do you offer a mobile or callout fitting service?
No. All fitting, diagnostics and repair work is carried out at our workshop in Ongar, Essex, by appointment only.
How much does fitting or repair cost?
Costs are quoted on enquiry. There are too many variables across vehicle types, kit specifications and fault types to publish a standard price list — contact us for a quote.
How long does it take to book an appointment?
Subject to availability, typical lead time is 1–3 weeks.
Can you repair a factory-fitted (OE) air suspension system, or only aftermarket kits?
Both on motorhomes, vans and light commercials. We diagnose and repair OE factory-fitted systems as well as aftermarket kits — common faults include leaking air springs, compressor failure, height sensor issues and loss of ride height control.
Do you work with motorhome dealers and fleet operators, or only private owners?
All of the above — private vehicle owners, motorhome dealers, fleet operators and commercial customers.
Do you work on large motorhomes?
Yes. The workshop handles large, tag-axle, A-class and 5t+ coachbuilt motorhomes, and vehicles up to 7.5t. Fitting, diagnostics and repair are all carried out on site by appointment.
Do you fit air suspension to commercial vehicles?
Yes. We supply and fit kits for light commercial vehicles including Sprinter, Transit, Crafter, Iveco Daily and Isuzu chassis up to 7.5t, as well as specialist conversions such as ambulances and welfare vehicles. See our light commercial range. Light Commercial
Do you repair air suspension on cars?
No. We don't repair factory-fitted air suspension on passenger cars such as Audi, BMW, Mercedes or Range Rover. Our workshop specialises in motorhomes, vans, light commercials and 4x4 kits.