It’s important to make sure that your used car doesn’t go wrong. This will save you money on repairs. 

This information is vital if you find yourself in an emergency situation and need to buy a car. 

It’s what car?The results of its recent reliability survey on used cars, published by. They will show you which makes and models are reliable and avoid problems.

This year, the results showed that Suzuki cars were the most reliable. Land Rover is still at the bottom of reliability for another year. 

Most reliable car maker: Suzuki topped the charts in 2021, with owners saying the brand has the highest dependability score of 97%. The Vitara SUV (pictured) had a flawless report

The most reliable car manufacturer: Suzuki was the top-ranked brand in 2021. Owners rated Suzuki as the best, at 97%. A flawless report was given to the Vitara SUV (pictured).

Auto Trader’s latest update for the mid-monthly shows an incredible increase in used vehicle values over the past 12 months.

It claims that the average advertised price for used vehicles on its website last week reached £20,109, which is 28 per cent higher than a year ago, such is the massive demand for used cars in the wake of supply issues with the latest models.

16.328 Drivers will provide feedback on the reliability of older vehicles for those who have no choice but to get a new car.

And for anyone concerned about making the leap to an electric or hybrid model, there was reassurance – these types of car were rated as the most dependable, with an average class reliability score of 92.2 per cent. 

The most reliable and the least trustworthy car brands 


1.Suzuki: A 97.0% reliability rating

2. Lexus: 93.6%

3. Toyota: 92.4%

4. Honda: 92.0%

5. Kia: 90.6%

6. Mitsubishi: 89.0%

7. Mazda: 88.6%

8. Hyundai: 86.5%

9. Dacia: 85.8%

10. Porsche: 85.3%


1.Land Rover: 65.3%

2. Citroën: 71.8%

3. Peugeot: 73.5%

4. Renault: 74.8%

5. Jaguar: 74.9%

6. Fiat: 76.3%

7. Nissan: 76.4%

8. Vauxhall: 76.7%

9. Volkswagen: 77.1%

10. Mercedes-Benz: 77.4%

Source: What Car? The 2021 Reliability Study is based upon feedback from 16,328 car owners aged 6-15.

This reliability data applies to cars that are between six and fifteen years old. It covers 27 brands, and an impressive 139 of the most popular models.

Three models, despite their ageing, achieved an impeccable reliability rating of 100%: The current Ford Mondeo and Suzuki Vitara versions and the older-generation Nissan Leaf electric car (on sale since 2011 through 2018).

Suzuki won the brand ranking battle with the Vitara. The marque was able to surpass dependability icons Lexus and Toyota by a score of 97%. 

At the other end of the chart, Citroën and Land Rover received the lowest scores of 71.8 per cent and 65.3 per cent respectively.

These brands have average reliability scores that are lower than the lowest performing models.

This award went to Vauxhall’s 2009-2015 Vauxhall-Astra petrol-variants, who scored 36.7 percent. 

The Ford Mondeo, which was unceremoniously axed from showrooms this year, is proving very reliable, with owners saying not a single thing went wrong with this in the last 12 months

Ford Mondeo owners have been very happy with the reliability of their vehicle, despite it being unceremoniously taken from public showrooms earlier this year.

Another car with top marks for reliability is the original Nissan Leaf EV, which shamed other battery models that cost more than three times as much as this family hatchback

The original Nissan Leaf EV is another car that has top-notch reliability. It outperforms other battery models, but it’s still a family hatchback.

Meanwhile, small is best if you’re after an SUV – small SUVs averaged 86.6 per cent, whereas luxury SUVs could muster only 69.5 per cent.

In the survey owners were asked whether their vehicle experienced any problems in the last 12 months. They also had to tell how long it took for repairs and what the total cost.

According to the report, 25% of vehicles between six and fifteen years had suffered a fault.

Only 15 percent of all faults were fixed at no cost. The vast majority of these cars are out of warranty. 

Although 56 per cent of repair bills were less than £500, 6 per cent (around one in 16 cases) of owners had to pay out more than £1,500 to get their cars put right.

Rather unsurprisingly it was Land Rover that propped up the reliability table with a brand score of 65.3%. The Discovery (pictured) was the worst rated model, with a score of 43.4%

Land Rover, which scored 65.3% on the reliability scale was not surprising. The worst-rated model was Discovery (pictured), with an average score of 43.4%

While the Land Rover Discovery scored poorly for reliability, it was nothing on the worst model - this Vauxhall Astra. Petrol versions were given a 37.9% dependability score from owners

Although the Land Rover Discovery was not the most reliable model, this Vauxhall Astra is the best. The owners gave Petrol models a 39% Dependability Score

And older cars weren’t always quick and easy to fix; faults rendered one in five cars undriveable and 23 per cent of those that went wrong spent more than a week in the garage.

What Car? commented on the survey. Steve Huntingford was the editor. He stated that increased demand from computer chip shortages and other supply issues has caused prices to rise for used cars. 

‘With many models costing a third more than they did a year ago, it’s more important than ever to pick a dependable model that won’t land you with a constant stream of expensive repair bills. 

“The What Car? The Used Car Reliability Survey helps buyers identify the most reliable brands and models that they should spend their money.

Below are the most reliable and worst models for each model category: 

The most and the least reliable older models are sorted by their category 

Hybrid, electric and hybrid vehicles

The average reliability score is: 92.2%

Despite its huge price, the Tesla Model S was ranked lowest of all EVs for reliability

Even though it was expensive, the Tesla Model S is ranked low among all EVs in terms of reliability.

Most reliable model: Nissan Leaf (2011-2018) – 100%

Model with the lowest reliability: Tesla Model S (2014-present) – 66.2% 

The small SUV

The average reliability score is: 86.6% 

Mini's Countryman scored the lowest reliability rating of all compact SUVs at 83%

Mini’s Countryman received the 83% lowest reliability score of all compact SUVs

Most reliable model: Suzuki Vitara (2015-present) – 100% 

Model with the lowest reliability: Mini Countryman (2011-2017) – 83.0% 

Value and small cars

The average reliability score is: 84.4%

Toyota commonly tops reliability reports like this. The previous-gen Yaris is proving particularly durable, say owners

This reliability report shows that Toyota is a top-rated car in terms of reliability. Owners say the previous generation Yaris has been particularly resilient.

Most reliable model: Toyota Yaris (2011-2020) – 98.5% 

Most reliable:Vauxhall Corsa (2006)-2014 – 67.1%

Cars for families

The average reliability score is: 82.8% 

The Mazda3 hatchback wasn't far away from receiving a perfect reliability score. The same can't be said for the old Vauxhall Astra

A perfect reliability score was not far from the Mazda3 hatchback. This is not true for the Vauxhall Astra.

Most reliable model:Mazda 3 (2014-2019), 99.1% 

Model with the lowest reliability: Vauxhall Astra petrol (2009-2015) – 37.9%

Executive cars

The average reliability score is: 82.4% 

While the Mercedes C-Class on sale at the same time as the Ford Mondeo would have cost far more to buy, it is almost half as dependable as its more affordable rival

The Mercedes C-Class, which is on sale simultaneously with the Ford Mondeo at a much higher price, is nearly half the cost of its less expensive counterpart.

Most reliable model: Ford Mondeo (2014-2021) – 100% 

Model with the lowest reliability: Mercedes-Benz C-Class petrol (2014-2021) – 54.0%

Convertibles, coupes and sports cars

The average reliability score is: 81.0%

The world's most-bought roadster is also very dependable. No wonder the Mazda MX-5 is loved by its owners

This is the world’s best-selling roadster. It is reliable, too. The Mazda MX-5 is beloved by its owners.

Most reliable model:Mazda MX-5 (2015-present), 95.5% 

Model with the lowest reliability: BMW 3 Series Coupé/Convertible (2006-2013) – 68.6%

Large SUVs

The average reliability score is: 80.2% 

Most second-hand car buyers tend to steer clear of older large SUVs that are over 15 years old, but that shouldn't be the case with the solid Honda CR-V

Many second-hand buyers avoid large, older SUVs over 15 years of age. But that should not be true with the Honda CR-V.

Most reliable model: Honda CR-V petrol (2006-2012) – 95.8% 

Model with the lowest reliability: Land Rover Discovery Sport (2014-present) – 59.3%

SUVs for Families

The average reliability score is: 78.3% 

BMW's X1 is proving that a premium price tag can also mean decent reliability levels. Though the same can't be said for its family SUV rival, the Range Rover Evoque

BMW’s X1 proves that a higher price can still translate into good reliability. The Range Rover Evoque, a family-oriented SUV is not as reliable.

Most reliable model:BMW X1 (2015) – 97.8% 

Model with the lowest reliability: Range Rover Evoque (2011-2019) – 61.7% 

Cars of luxury

The average reliability score is: 75.5% 

A reliability score of 53% puts the Jaguar XF at the bottom of the pile for luxury saloon cars

Jaguar XF’s reliability score is 53%, which places it at the bottom end of luxury saloon cars.

Most reliable model:BMW 5 Series 2010-2017 – 89.8% 

Model with the lowest reliability: Jaguar XF (2015-present) – 53.0%

Luxurious SUVs

The average reliability score is: 69.5%

The Porsche Macan's 88.1% reliability rating is impressive, given how poorly the Land Rover Discovery rated among drivers

Given the poor reliability score of Land Rover Discovery, which was rated by drivers at 88.1%, it is remarkable that Porsche Macan has an 88.1% reliability rating.

Most reliable model: Porsche Macan (2014-present) – 88.1% 

Model with the lowest reliability: Land Rover Discovery (2004-2017) – 43.4% 

Source: What Car? The 2021 Reliability Study is based upon feedback from 16,328 car owners aged 6-15.


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