If you’re shopping for a used car and you’re tempted by something a bit posher than your usual fare, you might want to read this first. The Land Rover Discovery has been named the UK’s most unreliable used car for 2026, according to fresh data from warranty firm Warrantywise.
The company’s annual Reliability Index is based on an analysis of 1.6 million UK repair data points, scoring each model out of 100. The lowest score this year went to the Land Rover Discovery at 17.2 out of 100, compared with the top-ranked Toyota Yaris on 89.2.
The index isn’t built on owner opinions or social media reviews. It’s based on real repair requests, with the calculation factoring in claim frequency, the car’s age at the time of the fault, mileage and average labour time. The data covers January 2023 to January 2026, and only models with at least 250 cars on plan were eligible for the ranking.
The numbers for the Discovery are sobering. The average repair price for a used Discovery was £2,050.24, with the most expensive single repair coming in at a whopping £25,694.93. The list of unreliable models was dominated by large SUVs and executive saloons, with the BMW 7 Series in second place on 18.7, followed by the Mercedes S-Class and Audi A7, both on 19.2.
It gets worse if you fancy a Discovery Sport. The most expensive single repair across the entire bottom ten was on a Land Rover Discovery Sport — £44,401.48. Ouch.
Land Rover dominates the bottom of the chart. The brand also featured in 5th, 6th, 8th and 10th places with the Velar, Range Rover, Range Rover Sport, Discovery Sport and Defender 110 respectively. The BMW X5 and X7 took 7th and 9th place.
Across the bottom ten vehicles, average repair costs stand at £2,051.63, with the figure ranging from £1,847.70 for the BMW X5 to £2,467.37 for the BMW 7 Series. Emissions-related faults were the most common issue, affecting four of the ten models, alongside electrical and suspension problems.
Antony Diggins, managing director of Warrantywise, made the point that these aren’t bad cars — they’re just expensive when things go wrong. He said many of the lowest-scoring vehicles sit in premium segments yet remain highly desirable for a reason, and that the key is balancing that appeal with the reality of potential repair costs.
He added that the data shows price doesn’t always equal reliability, and because the Index is based purely on customer repair data rather than cost, it offers a data-led view of what owners can expect.
At the other end of the table, it’s the simple, sensible cars that dominate. After the Toyota Yaris on 89.2, the most reliable used models were the Kia Picanto on 86.8, Toyota Aygo on 83.8 and the Toyota RAV4 on 79.9. Eight of the top ten came from Japanese or Korean manufacturers.
The takeaway? That tempting bargain Range Rover at £15,000 might end up costing you a lot more than you bargained for. If you’re buying any premium SUV used, check the service history religiously and seriously consider a third-party warranty before the manufacturer’s runs out.
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Sources:
- Motor Trader — Warrantywise reveals models at lower end of Reliability Index
- Car Dealer Magazine — Land Rover Discovery named Britain’s most unreliable used car
- AM Online — Premium cars no guarantee of reliability, Warrantywise data shows
- Definitely Not A Guru — Worst Cars for Reliability Revealed
- Bodyshop Magazine — Most and least reliable used cars revealed
