Premium-car problems: Range Rover named most unreliable used motor - and the top 10 list of least-dependable models is dominated by pricey brands

Warrantywise has revealed its annual Reliability Index for used vehicles
The top 10 most unreliable cars of 2021-22 is dominated by premium brands
Land Rover's Range Rover SUV scored worst with a rating of 20.2 out of 100
The highest repair bill for the suave 4X4 was a massive £23,890, the index says
Audi, BMW, Bentley and Porsche are other pricey marques in the unreliability list

Updated: 04:59 EDT, 30 August 2022

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The Range Rover has been named the most unreliable motor in Britain, according to research from one of the nation's leading used-car warranty providers.

The previous-generation luxury SUV took the unwanted top spot in Warrantywise's annual Reliability Index, which has been exclusively revealed to This is Money.

It scored a lowly 20.2 out of 100 points. The highest repair cost recorded in 2021 to 2022 was £23,890 - more than the price of a new Ford Focus.

Premium-car problems: Land Rover's Range Rover might be a luxury SUV but its not without its issues, having been named the least reliable used motor in Britain

Warrantywise's reliability league table makes for difficult reading for some premium car brands.

It has Land Rovers, BMWs, and Porsches taking up seven out of ten spots for the worst performers, proving that spending big on cars doesn't guarantee issue-free motoring.

The data only covers used cars that are outside of the manufacturer's warranty but are also less than ten years old.

MOST UNRELIABLE USED CARS IN BRITAIN REVEALED
Position	Models	Highest repair cost in 2021/22	Overall Score /100
1	Land Rover Range Rover	£23,890	20.2
2	BMW M3	£12,115	21.4
3	Land Rover Range Rover Sport	£22,358	23.1
4	Porsche Panamera	£10,785	23.4
5	BMW X6	£9,613	23.6
6	Porsche Cayenne	£6,360	24.9
7	Audi Q7	£8,719	25.7
8	Bentley Continental GT	£6,227	29.1
9	Mazda CX-5	£5,777	29.6
10	BMW M5	£10,129	30.8
Source: Warrantywise Reliability Index NB: Minimum same size of 100 for each model included in the index. Only cars outside of their manufacturer's warranty period (usually 3 years) and less than 10 years old are included. Average repair costs collated over a period between 2021 and 2022.

The BMW M3 was second in the list of most unreliable used cars. Both this previous-generation car and the model before it were given a lowly score of 21.4 out of 100

The Range Rover Sport didn't fair much better than its bigger sibling. The sportier 4X4 - which has been on sale since 2013 - took third spot a score of 23.1 out of 100

The Porsche Panamera isn't a cheap car, and nor are some of the repair bills for examples outside of the manufacturer's warranty. One in the last year came to almost £11k

For specific models to be included, there needs to be records for at least 100 examples to be included in the index, which Warrantywise says is 'based on precise and quantifiable data'.

Land Rover's Range Rover took the unwanted number one spot for most unreliable mostly due to the frequency and cost of repairs with the opulent SUV.

With the highest repair costs being £23,890, and the frequency of repairs impacting the general reliability, the marque's previous generation Range Rover obtained an overall score of 20.2 out of a score of 100.

Warrantywise says the average repair cost for an owner of the previous Range Rover model is £1,607, which it says is comparatively low against some of the other expensive vehicles that made to bottom ten.

Compounding the misery for the British car brand is the luxury SUV's sister model, the Range Rover Sport.

The first two generations of the sportier 4X4 - which has been on sale since 2013 - took third spot in the list of unreliable used motors to own with a score of 23.1 per cent.

Like its bigger sibling, the highest repair cost seen in 2021-2022 was enough to buy a family-size hatchback, ringing in at £22,358.

The previous-generation BMW X6 was one of five luxury SUVs to make Warrantywise's bottom 10 list of unrealiable motors

Porsche's hulking Cayenne SUV might scream luxury, but owners of older cars will be left squealing when they see some of the repair bills for this luxury 4X4

Audi's Q7 is a large SUV aimed at families with a big budget. The 25.7 out of 100 reliability rating is for the first-generation model (pictured) and the pre-facelift version of the current Q7

BMW makes three appearances in the list of ten not-so-dependable models.

The M3 performance car took second spot, which covers both the previous-generation six-cylinder model (2014 to 2019) and the last of the V8-powered saloons, which were produced from 2007 to 2013, receiving a reliability score of 21.4 per cent and recording a highest repair bill of £12,115.

The German brand's previous-gen X6 took fifth spot with a score of 23.6 per cent, while the M5 - based on the previous two derivatives of the potent executive model - rated tenth with a 30.8 per cent score.

Other flash motors making up the order were the Porsche Panamera and Cayenne, Audi's Q7 SUV and the Bentley Continental GT.

The only 'mainstream' car making the bottom ten list was Mazda's CX-5.

Both the current and previous generation of the family SUV placed in ninth with a lowly score of 29.6 out of 100, with the biggest repair receipt in 2021-2022 coming in at £5,777.

Bentley's Continental GT is the most opulent car to make the top 10 of least reliable cars, according to Warrantywise records

The Mazda CX-5 - both the current and first-generation cars - is the only 'mainstream' model to make the list of least-dependable vehicles

Rounding out the top 10 unreliable cars is the BMW M5. It might pack lots of performance but it also has plenty of problems, according to extended warranty data

Lawrence Whittaker, boss of Warrantywise, said: 'The Reliability Index is extremely revealing of how luxury cars, which may seem like they would be reliable because of the costly price tags, aren't always so.

'The opinion that they should be very reliable, for the price that customers pay for them, is quite a popular one, and this evaluation of our data is helpful for us to guide customers the right way when wanting to make a large purchase on a luxury car, like a Porsche.

'Our sole purpose here at Warrantywise is to ensure that no matter what car you buy, it's covered and taken care of.

'Since the rise in parts cost and labour since last year, and continued pressures on the rising cost of living, it's even more important to protect your investment and learn about which cars to buy used, too.

'Through the Reliability Index, we are able to steer customers the right way when it comes to investing in a car. However, no matter what car it is – and how reliable it is – we can support it.'

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