Most (and least) reliable family cars

Family cars need to be durable and dependable. Pick one from our top 10 most reliable and it shouldn't let you down...

Most and least reliable family cars

Family cars have to be able to withstand the rigours of transporting children and all their equipment to all kinds of destinations. And, because being stuck at the roadside with little ones and a broken-down car would be very stressful, family cars really need to be dependable.

That's where the What Car? Reliability Survey can help because it reveals the cars most – and least – likely to suffer costly faults. We asked nearly 13,000 people to tell us about any problems their cars had suffered in the previous 12 months, detailing how long each issue had kept their car off the road and how much it had cost to be fixed. We also asked what area of the car was concerned so we can also share this information with potential buyers. 

By attaching a weighting to each of the owner responses, we've calculated a unique reliability rating for 175 models from 31 brands. The models with the least problems and lowest repair costs achieve the highest scores, and those that spent a week or more in the garage and chalked up large repair bills are rated the lowest. The cars in this round-up are all aged up to five years old.

We’re running the What Car? Reliability Survey again for 2021. Complete it to help us get information on more models.


Top 10 family cars for reliability

10. BMW 1 Series petrol (2011-2019)

BMW 1 Series front - red

Reliability rating 96.1%

The petrol 1 Series isn't proving as reliable as its diesel counterpart, with 15% of owners experiencing a fault on their car. The main issues were with its engine and exhaust – 5% of owners reported problems in these areas. We were also told about issues in a number of other areas including the air con, bodywork, brakes, fuel system, gearbox, non-engine electrics and infotainment. 

Four out of five cars could still be driven, but a third took more than a week to repair. More than half of the required work was done for free, and no bills exceeded £750. 

Read our full BMW 1 Series review >>

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9. Ford Focus (2018-present)

Ford Focus front action

Reliability rating 96.4%

The most common issues with the Ford Focus were with its engine electrics, exhaust and the infotainment system, with 21% of owners telling us their cars had gone wrong. There was also a small percentage of problems with the engine, gearbox/clutch and non-engine electrical systems. 

 All faults were rectified in a day or less under warranty; 90% of vehicles could still be driven and 70% were put right in less than a week. 

Read our full Ford Focus review >>

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=7. Seat Leon petrol (2013-2020) 

Seat Leon hatchback 2019 front tracking

Reliability rating 96.6%

Owners told us 14% of Seat Leon petrols had experienced a fault. Non-engine electrics were the main fault with 6% of owners reporting a problem in this area. The two most common other problem areas were the bodywork and interior trim, and a small number of owners experienced issues with brakes, engine electrics, the infotainment system and suspension.

All cars could still be driven, but half took more than a week to repair. Four out of five cars were fixed for free, and none of those who paid were charged more than £200.  

Read our full Seat Leon review >> 

2016 Volvo V40 T3 review

Reliability rating 96.6%
According to owners, 26% of V40s suffered a fault, with engine electrics being the main cuplrit. There were also issues with the engine, battery, brakes, engine, exhaust and interior trim. 

However, four out of five cars could still be driven and three quarters were back on the road in less than a week. Even better, all work was done for free. 

Read our full Volvo V40 review >>


=5. Ford Focus diesel (2011-2018)

What Car? invites you to preview the 2014 Ford Focus

Reliability rating 97.1%

The previous-generation Ford Focus is proving more reliable than the current one. Despite 23% of owners reporting a fault, most of the issues were minor and most cars could still be driven. The issue that affected the most owners was the engine electrics, followed by the air con and infotainment systems. A small number of owners had issues with the battery, bodywork, brakes, fuel system, gearbox, non-engine electrics and suspension.

All cars were repaired in less than a week, 42% of work was done for free and no repair bills topped £200. 

Mini Clubman front

Reliability rating 97.1%

The Mini Clubman had very few faults; only 17% of owners reported an issue. Bodywork was the main concern, followed by the engine. 

All cars could still be driven and half were repaired in a day or less; 75% of work was done under warranty and no owners paid out more than £100 to get their car put right. 

Read our full Mini Clubman review >> 

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4. Mercedes A-Class (2013-2018) 

2016 Mercedes-Benz A-Class review

Reliability rating 97.2%

Although 20% of A-Classes suffered a fault, the bodywork and interior trim were the two main areas of concern, each accounting for 13% of problems. Some owners also reported issues with the air con, battery, engine and non-engine electrics and the gearbox/clutch. 

Only one in 10 cars couldn't be driven, but some repairs took more than a week. The vast majority of work was done for free, though, with no repair bills exceeding £500. 

Skoda Octavia front - 67-plate car

Reliability rating 97.5%

Petrol versions of the Octavia are slightly more rugged than the diesels, with 12% suffering a fault, compared with 14% of diesels. The engine and its electrical system were the main concern, followed by infotainment/sat-nav, and then air-con and bodywork.

All cars could still be driven and two-thirds of issues were rectified the same day, with 90% of work done for free and no bills exceeding £200.

Read our full Skoda Octavia review >>

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2. Alfa Romeo Giulietta (2010-present)

Alfa Romeo Giulietta

Reliability rating 98.6%

Italian brands haven’t traditionally had a strong reputation for reliability, but the Giulietta shows this is unfair. Only 12% of cars had a fault, with issues split evenly between the braking system and gearbox/clutch.

All cars could still be driven and were fixed in a day or less at no cost to the owners. 

Read our full Alfa Romeo Giulietta review >>

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1. BMW 1 Series diesel (2011-2019) 

2017 BMW 1 Series

Reliability rating 99.2%

What went wrong? Interior trim 5%

Diesel-engined 1 Series models are twice as dependable as their petrol counterparts; only 5% had a fault, compared with 10% of petrols. Most of the cars could still be driven and were back on the road in less than a week, and all work was carried out for free.

Owner’s view “My car has done more than 85,000 miles and it has been ultra-reliable. It hasn’t missed a beat”

Read our full BMW 1 Series review >>

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