Is tyre pressure checked at an MOT?

While the actual tyre pressure is not checked as part of an MOT test, a faulty Tyre Pressure Monitoring System (TPMS) will result in an MOT failure.

Like any electronic system, the TPMS can experience failures for various reasons. Common causes include battery depletion in the tyre pressure sensors, or the valve sensors becoming damaged or corroded over time.

For more information on the TPMS, read: What is a TPMS?

Will my car fail the MOT if the tyre warning light is on?

During the MOT test, the inspector will likely check the functionality of the warning lights on the dashboard, including the tyre pressure warning light. If the warning light stays on even after the tyre pressures have been corrected and reset, it could indicate a potential fault with the TPMS and result in an MOT failure. This is because a malfunctioning TPMS can compromise the vehicle's safety by not providing accurate information about tyre pressures, which could lead to underinflated tyres and unsafe driving conditions.

What parts of the tyre are checked at MOT?

Several aspects of the tyres are thoroughly checked during an MOT to assess their condition, safety, and overall roadworthiness. The specific tyre parts examined during the MOT include tread depth, condition, size and type, and wheel alignment.

What else is checked at an MOT?

The condition of your tyres isn’t the only thing checked during an MOT. The test covers a long list of components and systems across your car. Some (but not all) of the standard checks performed during an MOT include:

• Brakes: The braking system is thoroughly inspected to ensure it functions effectively, with sufficient braking performance and no signs of significant wear or defects.
• Steering and suspension: The steering and suspension components are checked for wear, damage, and proper alignment to ensure stable and safe handling.
• Tyres: Tyre condition, tread depth, and correct size are assessed to comply with legal requirements.
• Seat belts: The condition and functionality of seat belts are examined, ensuring they can securely restrain occupants in an accident.
• Exhaust emissions: The vehicle's exhaust emissions are measured to check if they are within the acceptable limits set by environmental regulations.
• Electrical systems: Various electrical components, such as the battery, mirrors, and indicators, are examined to ensure they function correctly.

For a full list of MOT checks, read: What’s checked at an MOT?

What happens if my tyres fail the MOT checks?

If your tyres fail the MOT, you must take the necessary steps to address the issues before the vehicle can be retested and deemed roadworthy. Depending on the specific reason for the failure, you might need to replace one or more tyres, perform repairs, or adjust the tyre pressure to meet the required standards.

If you think you may have a problem with your tyres or if they’re due for a test, our motoring experts can check your tyres for free at Halfords. If there’s a problem, our range of tyre services can get you back on the road safely and quickly, wherever you’re based.