Reliability is one of the most important factors when choosing a car - whether you’re buying outright, taking out a personal lease, or choosing a vehicle through the mobility scheme. An unreliable car means unexpected repair bills, time off the road, and the stress of repeated garage visits. Choosing wisely from the start can save thousands of pounds over a car’s lifetime.
This guide draws on data from four of the UK’s most respected car reliability surveys - What Car?, Honest John, Warrantywise, and Which? - to give you a clear picture of the most reliable and least reliable cars on sale in the UK in 2026. We’ve also noted where findings are particularly relevant to drivers comparing lease and mobility scheme options.
How UK Car Reliability Is Measured
Before diving into the results, it’s worth understanding how these rankings are compiled - because they each measure slightly different things.
The What Car? Reliability Survey is one of the most comprehensive in the UK, drawing on responses from over 32,000 owners across 227 models. It asks whether their car suffered a fault in the previous 24 months, how much it cost to fix, and how long the car was off the road. Crucially, What Car? weights its scores on cost and inconvenience rather than just fault frequency.
The Honest John Satisfaction Index collects feedback from thousands of readers who own and drive the cars daily, scoring both reliability and overall ownership satisfaction.
The Warrantywise Used Car Reliability Index is based on data from over 180,000 real repair claims, making it particularly useful for used car buyers.
Which? surveys over 63,000 UK drivers annually, scoring cars across three age bands - zero to four years, five to nine years, and ten to fifteen years - giving a picture of how reliability changes with age.
The Most Reliable Cars in the UK 2026
Lexus NX - Most Reliable SUV
The Lexus NX tops multiple reliability rankings, scoring an impressive 98.06% in recent surveys. For the fifth consecutive year, Lexus has come out on top for reliability across its range, with an overall brand score of 97.01% - significantly above the 89.38% average across all brands. With hybrid and plug-in hybrid powertrains, the NX is also an efficient and refined daily driver. One in fifty NX owners report a significant problem, compared to one in five for the worst performers on this list.
Toyota Yaris - Most Reliable Small Car
The Toyota Yaris is the highest-rated car in the Warrantywise Reliability Index, scoring 92.8 out of 100 across all generations. The fourth-generation Yaris from 2020 onwards achieved a perfect 100% reliability score in the What Car? survey - not a single owner reported a fault in 24 months. For a small, economical car available at a modest price, that’s a remarkable achievement.
Hyundai i10 - Perfect Score Small Car
The Hyundai i10 is one of just four cars to achieve a 100% reliability rating in the What Car? Reliability Survey, meaning not one of the owners surveyed reported any fault in the previous 24 months. It’s an outstanding result for a city car, and the i10 is available through the mobility scheme price list.
Toyota Corolla - Best Reliable Family Car
The Toyota Corolla scores 96.4% for reliability in the Honest John survey and consistently ranks near the top across multiple reliability indices. Toyota backs it with a ten-year warranty when serviced at Toyota dealerships. Made in the UK at Toyota’s Derbyshire plant, it’s a practical hybrid that costs little to run and rarely goes wrong.
BMW 3 Series - Most Reliable Executive Car
According to the Fleet News FN50 survey - which draws on breakdown, warranty and servicing data from over 1.3 million new cars - the BMW 3 Series has been the most dependable car in its class for four years in a row. It’s a strong result for a premium executive car, and the 3 Series combines genuine driving enjoyment with above-average long-term dependability.
Tesla Model 3 - Most Reliable Electric Car
Early Tesla Model 3 examples had build quality concerns, but the car has matured significantly and is now considered one of the most reliable new cars available - and the most reliable electric car in the UK. Tesla Model 3 owners also rate their car highly for overall ownership satisfaction, with the car scoring strongly for driving experience, technology, and long-range capability. With up to 435 miles of claimed range and an extensive Supercharger network, it’s a compelling option for private lease customers.
Honda Jazz - Reliable and Practical Small Car
The Honda Jazz scores 89.0 out of 100 in the Warrantywise index and combines strong reliability with class-leading practicality. Honda is a consistent top performer in UK reliability rankings, with quality of engineering running through its entire model range and ensuring strong long-term customer loyalty.
Mazda CX-5 - Reliable Family SUV
What Car? owners describe the Mazda CX-5 as faultlessly reliable, with multiple survey respondents reporting zero issues over two years of ownership. Honest John readers cite the CX-5 for all-round excellence, covering not just reliability but build quality and the overall ownership experience. It’s a particularly strong used car choice at three to five years old.
Skoda Karoq - Most Reliable European SUV
The Skoda Karoq finished a close second to the Lexus NX in the Honest John reliability rankings and also placed third for overall ownership satisfaction. Among European-branded SUVs, the Karoq consistently outperforms its Volkswagen Group stablemates and represents strong value for reliability-focused buyers.
Suzuki Swift and Vitara - Budget Reliability Champions
The Suzuki Swift and Suzuki Vitara both feature in the Warrantywise top ten for used car reliability. Suzuki now offers a warranty of up to ten years for vehicles regularly serviced at its franchised dealers - a statement of confidence in the brand’s long-term dependability that few rivals can match.
Most Reliable Car Brands 2026 - Summary
Drawing across all four major surveys, the most consistently reliable brands in the UK in 2026 are Lexus, Toyota, Honda, Mazda, Suzuki, Hyundai, Kia, and Skoda. Japanese manufacturers dominate the top of reliability rankings, with fault rates consistently under 15% across Toyota, Honda, Mazda, and Suzuki models. Of the European brands, Skoda consistently outperforms its Volkswagen Group stablemates. Honda took pole position in the What Car? Reliability Survey brand rankings, with strong performances from the Civic, HR-V, and Jazz all contributing to an exceptionally low overall fault rate.
The Least Reliable Cars in the UK 2026
Vauxhall Corsa - Worst for Reliability Overall
The Vauxhall Corsa was rated the least reliable car in the UK in the Honest John Satisfaction Index, with one in five Corsa drivers reporting reasons to question the car’s reliability. It also finished last for overall ownership satisfaction. This is a particularly damaging finding given the Corsa’s popularity as a first car and budget purchase - buyers who can least afford unexpected costs are most exposed to its shortcomings.
Vauxhall Mokka
The previous-generation Vauxhall Mokka is frequently cited among the least reliable cars in the UK, with a high proportion of owners reporting faults - predominantly electrical and engine-related. Together, the Corsa and Mokka have seriously damaged Vauxhall’s overall reliability standing, pushing the brand to the bottom of the manufacturer rankings.
Land Rover Discovery Sport and Range Rover
Land Rover’s Discovery Sport consistently appears near the bottom of UK reliability surveys, and when things go wrong the repairs are expensive. The Land Rover Discovery and previous-generation Range Rover both scored just 22.1 out of 100 in the Warrantywise index, with average repair costs exceeding £2,000 and some individual repair requests approaching £26,000. Land Rover’s brand reliability ranking sits at the foot of the Honest John tables. For mobility scheme or lease customers, Land Rover’s poor reliability record makes it a higher-risk choice than the data-backed alternatives above.
Peugeot 3008
The Peugeot 3008 has appeared at the bottom of UK reliability rankings on multiple occasions. Owners consistently report problems with both the cars themselves and the cost and speed of dealer remedial work. This is a particular concern given how popular the 3008 is as a family SUV choice, including through the mobility scheme.
MG ZS and MG3
MG is rated the least reliable car brand in the What Car? Reliability Survey. One in five MG3 owners reported at least one fault with their car, and 83% of cars that went wrong were in the workshop for more than a week. While MG’s low prices are attractive, the reliability data suggests the savings can quickly be eroded by repair costs and time off the road.
Fiat 500e - Unreliable Electric City Car
The electric Fiat 500e is significantly more prone to problems than the petrol version, with 19% of owners reporting a fault. Just over half of the cars that went wrong were out of action for more than a week, and a third were rendered undriveable by their fault. For city car buyers considering an EV, the Toyota Yaris or Hyundai i10 present a far stronger reliability case.
Jaguar
Jaguar consistently scores poorly in UK reliability surveys, with high repair costs combined with frequent engine and navigation system failures. Despite its prestige positioning, ownership data suggests Jaguar reliability lags well behind comparably priced German and Japanese alternatives.
Audi Q7
The Audi Q7 is the least dependable seven-seater and luxury car in the What Car? survey, with a reliability rating of 78.6% and a fault rate of 47% - nearly half of all Q7s reported on had experienced a fault. Audi’s smaller models perform considerably better, but the Q7 is one to approach with caution, particularly as a used purchase outside warranty.
Mercedes C-Class (latest generation)
The latest Mercedes C-Class has suffered significantly more faults than the previous generation, with 43% of cars reported on experiencing a problem - compared to 23% for the 2014–2021 model. Mercedes covered the cost of most repairs, but with 39% of faulty cars spending more than a week in the workshop, the inconvenience factor is high.
Least Reliable Car Brands 2026 - Summary
The three lowest positions in the Honest John brand reliability rankings are occupied by a trio of Stellantis marques - Vauxhall, Jeep, and a third Stellantis brand - suggesting the group has significant reliability work to do across its model range. Land Rover, Jaguar, MG, Fiat, and Alfa Romeo also feature consistently at the bottom of UK reliability surveys across multiple data sources.
What This Means for Lease and Mobility Scheme Customers
Reliability matters even more when you’re leasing rather than buying. On a private car lease, an unreliable car means time without transport while the vehicle is being repaired, potential disputes over end-of-lease condition, and - if your lease doesn’t include a courtesy car - real disruption to daily life. On the mobility scheme, most repairs on scheme vehicles are covered, but time off the road is still a significant concern for disabled drivers who depend on their car.
The data consistently points to the same conclusion: Japanese brands - particularly Toyota, Lexus, Honda, and Mazda - offer the strongest long-term reliability. Korean brands Kia and Hyundai have closed the gap significantly and now offer comparable dependability with longer warranties. Among European brands, Skoda and BMW (in fleet/executive models) perform well above average. Vauxhall, Land Rover, MG, Jaguar, and certain Stellantis models carry the highest reliability risk.
FAQ
Which is the most reliable car brand in the UK in 2026?
Lexus tops the Honest John brand reliability rankings for the fifth year running, with Toyota, Honda, and Mazda consistently close behind. Among budget brands, Suzuki and Hyundai offer strong reliability at lower price points.
Which cars should I avoid for reliability in 2026?
The Vauxhall Corsa, Vauxhall Mokka, Land Rover Discovery Sport, MG ZS, Peugeot 3008, and the latest Mercedes C-Class all feature near the bottom of multiple UK reliability surveys in 2026.
Are electric cars reliable?
It varies significantly by model. The Tesla Model 3, Toyota Yaris hybrid, and Hyundai Kona Electric all score strongly for reliability. The Fiat 500e and some MG electric models score poorly. As a general rule, simpler electric powertrains from established manufacturers tend to be more dependable than complex systems from newer or budget brands.
Does reliability matter more on a lease than when buying?
Yes, in practical terms. When you own a car outright you have more flexibility around repairs. On a lease - whether private or through the mobility scheme - being without your car has immediate consequences. Choosing a reliably-rated model reduces that risk significantly.
Which reliable cars are available on the mobility scheme?
Several of the UK’s most reliable cars are available through the mobility scheme price list, including the Toyota Yaris, Hyundai i10, Hyundai Kona, and Kia Picanto. It’s worth cross-referencing the current scheme price list with reliability survey data before making your choice.
Sources
- What Car? Reliability Survey 2026 - whatcar.com
- Honest John Satisfaction Index 2025/2026 - honestjohn.co.uk
- Warrantywise Used Car Reliability Index 2026 - warrantywise.co.uk
- Which? Car Reliability Survey 2026 - which.co.uk
- Parkers / Fleet News FN50 Survey - parkers.co.uk