Every year, millions of vehicles across the UK undergo an MOT test, generating a huge amount of data about common faults, pass rates, and long-term reliability. When analysed over time, MOT trends provide valuable insight into which car brands tend to be more reliable on UK roads — and which ones struggle as vehicles age.
An MOT test checks safety, roadworthiness, and emissions. While it doesn’t measure overall build quality directly, consistent MOT performance over several years is a strong indicator of reliability. Vehicles that regularly pass without major faults typically benefit from better engineering, durable components, and easier maintenance.
By reviewing MOT histories, patterns emerge around brake wear, suspension issues, corrosion, and emissions failures — all key markers of long-term dependability.
MOT trend analysis consistently shows that certain manufacturers achieve higher pass rates, especially as vehicles get older.
Japanese brands such as Toyota, Honda, and Mazda often stand out. These manufacturers are known for simple, robust engineering and strong quality control, which helps vehicles remain roadworthy beyond the first few years of ownership.
Some Korean brands, including Hyundai and Kia, have also improved significantly in recent years. Strong warranties and modern manufacturing standards mean their newer models tend to perform well in MOT tests.
MOT data also highlights brands that experience higher failure rates, particularly as mileage increases. Vehicles with complex electronics, advanced suspension systems, or performance-focused components may be more prone to faults over time.
This does not mean these cars are poorly built, but they may require more frequent maintenance to maintain MOT compliance. Diesel vehicles from various manufacturers, for example, often show higher emissions-related failures as they age, especially if used mainly for short journeys.
Brand reliability cannot be judged by MOT trends alone. Age, mileage, and servicing habits play a huge role. A well-maintained vehicle from a brand with average MOT performance can outperform a neglected car from a traditionally reliable manufacturer.
Regular servicing, prompt repairs, and addressing MOT advisories early all improve long-term outcomes. Checking a vehicle’s MOT history using tools like CheckMot helps drivers understand how a specific car has performed over time rather than relying only on brand reputation.
MOT trends also show differences by fuel type. Petrol vehicles often achieve more consistent pass rates as they age, while diesel cars face stricter emissions testing. Hybrids generally perform well, although battery and electronic system faults are becoming more visible as these vehicles mature.
Electric vehicles currently show strong MOT performance, but long-term trends are still developing due to their relatively recent adoption.
MOT trends help buyers and owners make informed decisions. They encourage drivers to look beyond marketing claims and focus on real-world performance data. When choosing a used car, combining brand-level MOT trends with an individual vehicle’s MOT record offers the clearest picture of reliability.
MOT trends provide valuable insight into the UK’s most reliable car brands, highlighting manufacturers that consistently produce vehicles capable of passing safety and emissions checks year after year. While Japanese and Korean brands often lead in long-term reliability, maintenance habits and driving patterns remain just as important. By reviewing MOT trends and individual vehicle histories, UK drivers can make smarter, more confident decisions.
Which car brand has the highest MOT pass rate in the UK?
Japanese brands such as Toyota and Honda frequently achieve high pass rates, particularly for older vehicles.
Does a high MOT pass rate mean a car will never break down?
No. MOT pass rates reflect safety and emissions compliance, not overall mechanical reliability.
Do premium cars fail MOTs more often?
Some premium cars experience higher failure rates due to complex systems, but good maintenance can offset this.
Is MOT data useful when buying a used car?
Yes. MOT history reveals recurring faults, mileage patterns, and how well a car has been maintained.
Can regular servicing improve MOT outcomes?
Absolutely. Regular servicing significantly increases the chances of passing an MOT without major faults.