When preparing for your MOT test, most drivers focus on lights, brakes, and windscreen wipers — but tyre pressure checks are often overlooked. Despite their simplicity, incorrect tyre pressure can have serious consequences for your MOT result and overall road safety.

Let’s explore why tyre pressure plays such a crucial role in MOT success, and how keeping it in check can save you from unnecessary failures and costly repairs.

Understanding Tyre Pressure and MOT Requirements

During an MOT test, examiners carefully inspect your vehicle’s tyres for condition, tread depth, and inflation levels. While the test does not measure tyre pressure directly, incorrect pressure can indirectly cause failures in related areas — such as tyre wear, braking performance, and steering control.

If your tyres show uneven wear or damage resulting from poor pressure maintenance, your vehicle could fail its MOT or receive advisories that affect resale value.

How Incorrect Tyre Pressure Affects MOT Results

1. Uneven Tyre Wear

Underinflated tyres cause the edges to wear faster, while overinflated tyres wear more in the centre. Uneven wear is a red flag during MOT inspections, as it indicates poor vehicle maintenance and potential handling issues.

2. Reduced Braking Efficiency

Incorrect tyre pressure can increase braking distances and reduce grip, especially on wet roads. MOT testers assess your braking system performance — and if your tyres compromise it, you risk a failure.

3. Steering and Suspension Problems

Tyres that aren’t properly inflated can affect your vehicle’s balance and steering alignment. This not only impacts the driving experience but can also result in MOT advisories for steering components or suspension wear.

4. Tyre Damage and Bulges

Low pressure can cause excess heat build-up, increasing the risk of sidewall damage or blowouts. MOT testers check for cuts, bulges, or any signs of tyre degradation — all of which can result from incorrect pressure.

How to Check and Maintain Tyre Pressure

1. Find the correct pressure – Check your vehicle’s manual or the sticker usually found inside the driver’s door frame.
2. Use a reliable gauge – Measure tyre pressure when tyres are cold for accurate readings.
3. Top up regularly – Visit a petrol station or use a home inflator to maintain correct levels.
4. Inspect tyres monthly – Look for uneven tread, cracks, or visible damage.

It’s also a good idea to check your tyre pressure before your MOT test. A simple adjustment could make the difference between a pass and a fail.

For complete peace of mind, use CheckMot.com to review your vehicle’s MOT history and advisories. You can spot past tyre-related issues and address them before your next test.

Why Regular Checks Save You Money

Keeping your tyres correctly inflated not only boosts your MOT success rate but also improves fuel efficiency and tyre lifespan. Even a slight drop in pressure can increase fuel consumption by up to 3%, costing you more in the long run.

Proper tyre pressure also enhances handling and reduces the risk of accidents — a small maintenance habit that delivers big safety and financial rewards.

FAQs

1. Can low tyre pressure cause an MOT failure?

Yes, if it leads to uneven wear, visible damage, or compromised braking and steering performance, your vehicle could fail or receive advisories.

2. How often should I check my tyre pressure?

At least once a month and before any long journey.

3. Will MOT testers check tyre pressure directly?

Not usually, but they will assess tyre condition, tread, and performance indicators affected by pressure.

4. Where can I check my MOT history for tyre-related advisories?

Visit CheckMot.com to access your full MOT record, including past tyre or brake-related advisories.

In short, tyre pressure checks might seem minor, but they’re key to MOT success and long-term vehicle health. Taking a few minutes to maintain proper pressure can help you stay safe, save money, and pass your MOT with confidence.