GR Supra (2019-)
A reliable car is one you can trust and won't let you down. But no amount of test drives or chats with your local dealer will tell you how reliable a car really is.
Every year, we survey thousands of drivers to find out if they've had any problems with their car. These can range from minor issues to catastrophic failures. We then use the results to identify which brands make the most-reliable vehicles – and the least.
Use our tool below to see the common faults, breakdown rates and average amount of time spent off the road for 36 different brands. And find the most and least-reliable brand in 2022.
In our annual Which? Car Survey, we surveyed more than 48,000 motorists about their cars, what problems they've had and if they've broken down so we can provide reliability ratings for hundreds of cars.
|Brand||0-4 year reliability rating||5-9 year reliability rating||10-15 year reliability rating|
The most-reliable car brand received a full five-star score for cars aged 0-4 years and also for cars that are 5-9 and 10 to 15 years old. No other brands managed this rating for all three age groups.
A five-star score means that there were very few instances where the brand's cars had to go to the garage to get something fixed, and even fewer instances of them breaking down. This helps to cement our top brand's position as the most dependable car brand there is.
This brand's hybrid car was one of its most-reliable models. Not a single vehicle made by this brand broke down during the first four years of its life, which meant it had one of the lowest breakdown rates of the hundreds of vehicles we collected information from in our survey.
On the flip side, the least-reliable brand was the only one to get the lowest mark possible – one star out of five – for both its newer and older cars.
According to our survey, nearly one in five owners had their car break down at least once between April 2020 and June 2021. And 43% of owners had a fault (of any kind) that required them to go to a garage to get it fixed. And as a result, people went without their cars for an average of five and a half days.
There were lots of common issues found among the least-reliable cars, too, including problems with electric windows/sunroof/mirrors, lights, alarms and connectivity. More serious (although, slightly less common) faults include issues with the engine-management system, engine-cooling systems and the fuel system.
Faults are weighted according to seriousness. So the more severe the fault and the more time the car is off the road, the harder the model's reliability score will be hit in our results.
The scores for each of these areas are then combined to provide an overall reliability score for each manufacturer, which is represented by a star rating, with one star being the worst and five the best.
Our robust reliability research is powered by the experiences of 48,034 owners, who have given detailed insight into the ownership and maintenance of 56,853 individual cars (online survey: April 2020 to June 2021).