Do Age and Mileage Affect Chances of Passing the MOT

Whenever it comes to a vehicle’s MOT testing, not all vehicles have the same odds of passing. If it's a three-year-old vehicle with low mileage, it will pass the test without any major or even minor issues. On the other hand, a vehicle with higher mileage is more likely to have issues and more items on its advisory list. Many motorists think of MOT failure as bad luck or poor maintenance, but what they don’t understand is the direct impact of age and mileage on the vehicle’s condition over time. This blog post will provide a detailed breakdown of how age and mileage affect the chances of a car’s MOT passing.

Wear and Tear With Ageing

Age directly affects a vehicle in ways that go way beyond the distance covered. Rubber components like tyres, hoses, and suspension bushes degrade with time, no matter how much mileage is covered. The reason behind this natural wear and tear is exposure to temperature changes and standard environmental conditions. All this causes the rubber compound to harden and crack. A common mistake made by vehicle owners is that they think the less the vehicle is used, the better condition it will be in. But what they need to understand is that certain components will wear down naturally, regardless of usage. Another factor that develops with age is corrosion. A car’s underbody, brake line and exhaust system are most prone to corrosion because of their constant and direct exposure to moisture.

How Does Mileage Impact Wear

While age may affect the condition of materials over time, mileage affects the condition of the vehicle through actual use. Pads, tyres, and suspension components will wear down depending on the number of miles covered. This means that the higher the mileage, regardless of the vehicle's age, the closer it will be to the condition of an older car. There is also a difference in wear caused by motorway driving and stop-start driving in urban areas. Motorway driving is the main cause of heat-related tyre wear, and driving mainly on urban roads puts more stress on brake and clutch components. Hence, two cars of the same age can face different MOT Birmingham outcomes just because of how they have been driven.

Combined Effect of Age and Mileage

The greatest risk of failure occurs when both age and mileage work against the vehicle at the same time. The older and more highly driven the vehicle, the greater the effect of environmental exposure and wear from consistent use over the years. This will result in multiple systems reaching their final days rather than a single system failing. As a result, older cars with high mileage often receive more advisories than for a specific failure, since everything is ageing at the same time.

Components Affected by Age and Distance Covered

Here is a detailed breakdown of the parts that wear down with age, mileage and both:

• Tyres suffer from the effects of both age and mileage. Mileage wears out the tread, while age makes the rubber tough and crack.

• Brakes get damaged mostly because of mileage, although brake fluid deteriorates over time no matter how many miles you put on your car.

• Bushes and mounts on the suspension system suffer from ageing. They become brittle over time, even at low strain levels.

• Exhausts suffer mainly from corrosion caused by ageing, especially if the car was sitting outside for many years and came into contact with road salt and moisture.

• Emission control systems, such as catalytic converters and particulate filters, can wear due to mileage and driving cycle.

Importance of Regular Servicing for Old Vehicles

If it's an old, high-mileage vehicle, there is a high chance of passing one MOT and failing the next. It's because a lot can go wrong with a vehicle over the course of a year. Booking a car service Birmingham appointment on time, and not relying only on the annual MOT, can help vehicle owners catch issues with their vehicle on time. By catching them at an early stage, they can be resolved before they turn into a major issue. This is quite relevant for components like suspension bushes or brake fluid, which degrade over time no matter how the car is being driven.

Conclusion

Age and mileage affect a vehicle in completely different ways. One leads to gradual material degradation, and the other causes wear with the vehicle’s usage. But with the combination of age and mileage, there is a higher chance of MOT failure. By recognising the components that are age- and mileage-sensitive, drivers will know how to prepare for the MOT and increase the chances of passing. The failure of a car that has covered significant miles or reached a certain age is not guaranteed. By having a proactive check done, there will be fewer chances the needing to get a retest done.