MOT for Motorhomes and Campervans: Rules, Weight Limits, and Tips

The motorhome MOT test UK rules are more complex than those for ordinary cars, with the requirements depending on the vehicle's weight, age, and classification. Many owners are surprised to discover that their motorhome falls into a different vehicle class from a standard car, with its own test requirements and — in some cases — different inspection criteria. This guide covers everything you need to know.

When Does a Motorhome Need an MOT?

Like cars, motorhomes and campervans registered in the UK require an annual MOT test from three years after the date of first registration. There is no grace period for motorhomes, and driving without a valid MOT is an offence carrying a fine of up to £1,000, plus penalty points in some circumstances.

The 40-year historic vehicle exemption applies to motorhomes and campervans in the same way it applies to cars: if the vehicle was manufactured more than 40 years ago and has not been substantially changed, it is exempt from the annual MOT requirement.

MOT Vehicle Classes for Motorhomes

The vehicle class for the motorhome MOT test is determined primarily by the vehicle's gross vehicle weight (GVW) — the maximum weight the vehicle is designed to operate at when fully laden:

• Class 4 (car-derived or small motorhomes): vehicles with up to 8 passenger seats and a GVW not exceeding 3,000kg. This includes most small campervans and van-conversions built on light commercial vehicle bases. The test is carried out at standard MOT stations and costs the same as a car MOT.
• Class 5 (larger motorhomes and minibuses): vehicles with more than 8 passenger seats or a GVW between 3,000kg and 3,500kg. These require a Class 5 test, which must be carried out at a station authorised for that class. Not all MOT centres are approved for Class 5.
• Class 7 (heavy motorhomes): goods vehicles and motorhomes with a GVW between 3,000kg and 3,500kg may also fall into Class 7 depending on how they are registered. Always check the V5C to confirm the vehicle class and registration category.

Before booking, check your V5C logbook to confirm the registered GVW. You can also run a free vehicle check to confirm the registered details.

What Is Checked on a Motorhome MOT?

The core safety checks for a motorhome mirror those for a car: brakes, tyres, lights, steering, suspension, and emissions. However, there are some additional or modified checks specific to larger vehicles:

• Tyres: motorhomes require specific load-rated tyres (typically LT or C-rated) that match the vehicle's GVW. Fitting standard car or van tyres underrated for the vehicle's weight is a dangerous failure.
• Brakes: the brake test accounts for the vehicle's higher weight. Some motorhomes have separate rear drum brakes that can seize if the vehicle is used infrequently — a very common motorhome MOT failure.
• Habitation area: the MOT does not check the living accommodation directly — gas systems, water, and electrics are not part of the MOT. However, the structure of the habitation area is checked for damage that could affect safety, and the habitation door must not obstruct emergency exit.
• Chassis and bodywork: corrosion in structural chassis members is a common problem on older coachbuilt motorhomes, particularly around the rear overhang and under habitation floor areas.
• Mirrors: motorhomes must have adequate mirrors to provide the driver with the required field of view. Extension mirrors must be correctly fitted and not damaged.

Common Reasons Motorhomes Fail the MOT

The most frequent motorhome MOT failures, particularly for vehicles used seasonally or stored over winter:

• Seized rear brakes: prolonged storage causes brake drums to rust onto the shoes. A short drive before the test rarely frees them fully. Have the brakes professionally checked if the vehicle has been stored for more than two months.
• Worn or deteriorated tyres: motorhome tyres age faster than car tyres due to UV exposure when parked. Check the tyre manufacturing date (the four-digit DOT code on the sidewall) — replace any tyre more than six years old regardless of visible condition.
• Lighting failures: habitation area marker lights, rear fog lights, and step lights are all checked. Older motorhomes with 12V lighting throughout often have multiple blown bulbs after winter storage.
• Windscreen damage: the large windscreen area on many motorhomes makes stone chip damage more likely.

Tips for Passing the Motorhome MOT

To maximise the chance of a first-time pass on your motorhome MOT test UK:

• Book at an MOT centre authorised for the correct vehicle class (Class 4, 5, or 7).
• Drive the motorhome for at least 30 minutes before the test, including several firm brake applications, to free off any surface brake corrosion.
• Check all lights, including step lights, awning lights, and any rear-mounted lights.
• Inspect tyre age codes and replace any tyre over six years old. Ensure tyres are correctly inflated to the vehicle manufacturer's recommended pressures.
• Check for chassis corrosion under the vehicle, particularly around jacking points and the rear overhang.

Check the current MOT status and any previous test records for your motorhome by running a quick MOT check or a full MOT history check.