RhinoPower Ltd

Japanese imports can be appealing to UK drivers, but modified vehicles may face extra scrutiny during their annual MOT test. Anyone buying second hand cars from Japan should understand that changes to lighting, suspension, exhausts, or other components can create problems if they do not meet UK requirements.

Some modifications are perfectly acceptable, while others may result in an MOT failure or require further checks before the car can be driven legally.

A few common modifications worth checking include:

- Non-standard headlights: Japanese-market headlights may be designed for driving on the left or right differently from UK requirements, depending on the vehicle. Incorrect beam patterns, poorly adjusted lights, or unsuitable conversions can cause an MOT failure.

- Modified exhaust systems: An exhaust that is excessively noisy, insecure, leaking, or missing required emissions equipment can cause problems. Catalytic converters and other emissions-control equipment must also meet the applicable requirements.

- Lowered suspension: Aftermarket springs or coilovers are not automatically an MOT failure. However, insecure components, damaged parts, inadequate clearance, or tyres rubbing against the bodywork can lead to a failure.

- Tinted windows: Excessively dark tinting on the front windscreen or front side windows can breach UK visibility requirements. The rules depend on the vehicle's first-use date and the amount of light transmitted.

- Steering wheels and other interior changes: Certain aftermarket steering wheels, insecure seats, or modifications affecting seat belts and airbags may raise safety concerns. The exact outcome depends on the component and the applicable MOT requirements.

- Wheels and tyres: Incorrect tyre sizes, exposed cords, serious damage, or tyres rubbing against other components can cause issues. Wheel modifications should also be checked for safe fitment.

Before booking an MOT, owners should inspect the vehicle carefully and confirm that any modifications comply with UK road-use rules. Passing an MOT does not automatically make every modification legal, and some changes may require additional approval or checks.

Has anyone experienced an MOT failure because of modifications on a Japanese import? Which changes caused the biggest problems, and what was needed to get the vehicle through its next test?