Will your Tyres Fail an MOT?

20 May 2026

According to the DVSA, at least 10% of MOT fails were due to tyre faults - and as one of the easiest parts of your vehicle to check and replace, this is an MOT fail that could be avoided! Take a look at our helpful tips and MOT tyre regulations to make sure that your tyres don't cause you to fail an MOT. 

The good news is that most tyre-related MOT failures can be avoided with regular checks and a bit of knowledge. This guide explains exactly what MOT testers look for, how to spot tyre problems yourself, and what to do if your tyres need replacing.

What Tyre Checks Are Included in an MOT? 

During an MOT, your tyres are inspected to make sure they meet the legal safety requirements for UK roads.  

The mechanic will check: 

• Tread depth 

• Tyre condition 

• Damage to sidewalls 

• Bulges or cuts 

• Uneven wear 

• Correct tyre size and type 

• Secure fitting 

Even if just one tyre fails to meet the legal standard, your vehicle can fail the MOT.   

What Is the Legal Tyre Tread Depth? 

In the UK, the legal minimum tread depth for car tyres is 1.6mm across the central three quarters of the tyre and around the entire circumference. 

If your tread drops below this level, your car will fail its MOT, and you could also face a fine of up to £2,500 per illegal tyre and three penalty points. 

A lot of drivers wait until their tyres are almost completely worn before replacing them, but performance begins to decline long before the legal limit. Wet weather grip reduces, braking distances increase, and the risk of aquaplaning rises significantly. If you need new tyres Setyres have a wide range of tyres to choose from, whatever type you need (weather and seasons are relevant, but Setyres also offer energy saving, high performance, budget tyres and more.  

How Can You Check Tyre Tread Yourself? 

One of the easiest ways to check your tread depth is with the 20p test. 

Simply insert a 20p coin into the tyre grooves. If the outer band of the coin is visible, your tread may be too low, and your tyres could be approaching the legal limit. Most tyres also include tread wear indicators built into the grooves. Once the tread becomes level with these indicators, it is time for a replacement. 

If you are unsure, it is always worth getting your tyres checked professionally before your MOT. 

Can Damaged Tyres Fail an MOT? 

Yes, absolutely. Damage is another major reason for tyre MOT failures. Your tyres may fail if they have cuts or cracks, bulges in the sidewall, exposed cords, objects embedded in the tyre, significant tears and signs of separation or structural damage. 

Bulges are particularly dangerous because they often indicate internal damage to the tyre structure. This can happen after hitting potholes or kerbs. Even if the tyre is still holding air, it could fail suddenly while driving. 

Is uneven tyre wear a problem?  

Tyres should wear evenly across the surface. If they are more worn on one edge than the other, it could point to another issue with the vehicle. 

Uneven tyre wear is often caused by: 

• Poor wheel alignment  

• Incorrect tyre pressure in hot or cold weather  

• Suspension problems 

• Worn shock absorbers 

This is why it is important not to ignore unusual tyre wear patterns. Replacing tyres without fixing the underlying issue can simply lead to the same problem happening again. If the wear is not excessive and the tread is still above the legal limit, it may not cause your vehicle to fail but you may be given an advisory which means you should get the issue checked out sooner rather than later.  

Will Cracked Tyres Fail an MOT? 

Yes, they can. Tyres naturally age over time, even if the car is not driven regularly. Rubber begins to harden and crack, especially when exposed to sunlight and changing temperatures. 

Small surface cracks might not seem serious, but deeper cracking can weaken the tyre and increase the risk of failure. 

Older tyres are often an issue on low-mileage vehicles where the tread still looks good, but the rubber itself has deteriorated. 

Can the Wrong Tyres Cause an MOT Failure? 

They can. Your tyres must be suitable for the vehicle and correctly matched on each axle. Mixing different tyre sizes or using tyres with incorrect load or speed ratings can result in MOT issues and affect handling. 

The MOT tester will also check that your tyres are fitted correctly and that they do not rub against or damage the bodywork, wheel arches or suspension struts.   

What Happens If Your Tyres Fail the MOT? 

If your tyres fail the MOT, you will need to replace them before the vehicle can pass the test. In some cases, continuing to drive with dangerous tyres could also invalidate your insurance or put you at risk of prosecution. 

That is why many drivers choose to have their tyres inspected before their MOT appointment. Catching issues early can save time, money, and stress. 

How Often Should You Check Your Tyres? 

Ideally, you should check your tyres at least once a month and before long journeys. 

 It only takes a few minutes to inspect: 

• Tread depth 

• Tyre pressure 

• Visible damage 

• Cracks or bulges 

• Uneven wear 

Regular checks can improve safety, fuel efficiency, and tyre lifespan while helping you avoid an MOT test fail. 

Need New Tyres Before Your MOT? Setyres Can Help 

If your tyres are worn, damaged, or close to the legal limit, replacing them before your MOT can help avoid a failure and keep your car safe on the road. 

At Setyres, drivers can choose from a huge range of tyres for different budgets, vehicles, and driving styles. Whether you need premium performance tyres, reliable mid-range options, or affordable everyday tyres, there is a wide selection available online. 

Setyres also stocks tyres from leading manufacturers including Michelin, Goodyear, Pirelli, Bridgestone, Continental, Hankook, and more. With expert fitting, professional advice, and a wide choice of tyre brands available, Setyres can help you stay road legal and ready for your MOT. 

Need a service before your MOT?   

At Setyres, we offer various servicing options, including: 

• Full car service – This service should be carried out every 12,000 miles or every 12 months – whichever is sooner. This is the most thorough car service option available. 

• Interim car service – This servicing option is shorter than a full service and should be carried out between a full service every 6,000 miles or six months – again, whichever comes first. 

• Oil & filter service – This car service is simply for your car’s oil and filter. 

You can learn more about what is included in a service here.