Warrantywise, a prominent UK provider of extended used car warranties, has published its 2026 Reliability Index. The report, based on an analysis of 1.6 million UK repair data points, uncovers a crucial insight for used-car retailers: higher-value vehicles do not always equate to lower repair risk. Notably, as these vehicles age, large SUVs and executive saloons are frequently found at the lower end of reliability rankings.
Large SUVs and Executive Saloons Dominate Lower Rankings
The 2026 Reliability Index reveals that large SUVs and executive saloons make up the majority of the lowest-scoring vehicles. The Land Rover Discovery posted the lowest score of the year at 17.2 out of 100, in stark contrast to the Toyota Yaris, which topped the rankings with a score of 89.2.
Ageing Car Parc Fuels Need for Repair Data
The release of the latest Reliability Index coincides with continued growth and ageing of the UK car parc. In 2025, the number of cars on UK roads rose to 36,676,185—an increase of over half a million vehicles. This marks the fourth consecutive year of growth and the second-largest volume jump since 2016. As more used SUVs and premium models enter later stages of ownership, repair request data is becoming vital for retailers in managing stock, pricing, and customer expectations.
Navigating Demand for SUVs and Premium Models
Despite reliability concerns, consumer interest in SUVs and premium executive vehicles remains robust. Rather than avoiding these segments, retailers are encouraged to better understand long-term performance and adapt their strategies accordingly. This involves aligning acquisition prices with anticipated preparation costs, performing comprehensive vehicle checks, and maintaining transparent service histories for customers.
Premium Vehicles Face High Bills
The data shows that all 10 lowest-ranked vehicles fall into premium segments and often carry high purchase prices. The average repair request for these models surpasses £2,000, with some repairs exceeding £40,000. Emissions-related problems are the most common, affecting 4 out of 10 models, while electrical and suspension issues are also prevalent, underscoring the range of factors influencing ownership costs as vehicles age.
Late-Life Repairs Impact Retail Margins
The analysis stresses that the true risk for retailers lies not just in how often failures occur, but in the costs when they do. For complex SUVs and premium models, repair risks associated with emissions, electrical, and suspension systems can significantly affect profit margins. Most repair requests take place later in the vehicle’s life, at an average age of 6.8 years and mileage above 69,000, suggesting that even well-maintained cars may develop costly issues as they age.
Retailers Urged to Combine Reliability, Desirability, and Risk Management
Used car dealers face the ongoing challenge of balancing reliability with consumer demand for desirable vehicles. The recommendation is to retail these in-demand models more intelligently—through proper preparation, strategic pricing, and clear communication. Additionally, offering warranties to help customers mitigate unexpected repair costs can foster trust and transparency in the ownership experience.
Features Trump Reliability for Many Buyers
Even as some vehicles rank low on the Reliability Index, their appeal remains undiminished. Drivers continue to prize spacious interiors, comfort, design, performance, and advanced technology, underscoring that purchase decisions are influenced by more than just reliability.
Managing Director Highlights Need for Strategic Approach
Antony Diggins, Managing Director of Warrantywise, emphasised the importance of a new approach as the UK’s car parc grows older. “As more SUVs and premium models reach later-life ownership, repair requests become more frequent. This does not mean retailers should shy away from these vehicles, but rather that they should adopt different strategies for retailing them,” Diggins said.
Diggins further explained that the real opportunity for dealers rests in understanding the complete ownership lifecycle. Access to real-world repair data helps inform purchasing, highlights inspection priorities, and allows for better anticipation of preparation costs. “Our data is designed to help dealers protect their margins, manage risk, and build customer confidence by providing clear visibility on the cost of ownership,” he added.
| Position | Models | Average Repair Request | Most Expensive Repair Request | Average Age at Repair Request | Average Mileage at Repair | Overall Score /100 |
| 1 | Land Rover Discovery | £2,050.24 | £25,694.93 | 6.8 years | 70,544 | 17.2 |
| 2 | BMW 7 Series | £2,467.37 | £17,342.93 | 7.1 years | 74,162 | 18.7 |
| 3 | Mercedes-Benz S-Class | £1,970.86 | £16,641.54 | 6.9 years | 73,919 | 19.2 |
| = | Audi A7 | £1,862.30 | £7,464.24 | 7.3 years | 76,670 | 19.2 |
| 5 | Land Rover Range Rover Velar | £2,217.98 | £22,851.90 | 6.0 years | 58,936 | 19.7 |
| 6 | Land Rover Range Rover Sport | £2,002.76 | £24,708.00 | 7.1 years | 67,706 | 21.1 |
| 7 | BMW X5 | £1,847.70 | £30,675.02 | 7.1 years | 74,646 | 23.6 |
| 8 | Land Rover Discovery Sport | £2,002.30 | £44,401.48 | 7.3 years | 73,368 | 24.1 |
| 9 | BMW X7 | £1,992.68 | £15,934.80 | 7.3 years | 67,372 | 26.5 |
| 10 | Land Rover Defender 110 | £2,082.09 | £22,911.16 | 5.0 years | 52,839 | 28.0 |
Data-Driven Insights for Buyers and Retailers
Warrantywise’s Reliability Index acknowledges that all vehicles are susceptible to faults throughout their lifecycle. Drawing on 1.6 million data points, the Index gives each make and model a reliability score out of 100, offering both buyers and retailers a comprehensive perspective on long-term vehicle performance.
Comprehensive Dataset Ensures Robust Findings
The Reliability Index covers a three-year period and includes only models with at least 250 vehicles under warranty, ensuring a robust and representative sample. By spotlighting both high and low performers, the Index enables buyers to make informed choices and helps dealers with stock assessment, pricing, and vehicle preparation.
- For further details and complete data insights, readers are encouraged to visit the Warrantywise Reliability Index 2026 website.
