The MOST UNRELIABLE cars (and brands) of 2026! | What Car?

These are the most unreliable cars in 2026 – based on what more than 39,000 owners told us in the annual What Car? Reliability Survey. We reveal the 10 models with the lowest reliability scores, plus the five brands with the worst overall results.

You'll find out:
• How the survey works: 39,000+ owners, 225 models and 30 brands rated on faults, repair costs and time off the road
• 10th to 6th: the family SUVs and EVs starting the countdown
• 5th to 4th: premium SUVs and electric models struggle for reliability
• Bottom three revealed: the models with the worst scores for faults and repair delays
• The most unreliable car of 2026 revealed
• 5 worst brands overall: how the bottom five compare and which models drag their scores down
• What to buy instead: find the full results and most reliable cars on whatcar.com

📊 Tell us about the reliability of your car by completing the What Car? Reliability Survey: https://survey.alchemer.eu/s3/90474827/6fe2cc473d53&rdt=1

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🚗 Thinking about buying used or new? Read our full, detailed Reliability Survey results and check the latest pricing on every new car right here: http://www.whatcar.com

What Car? is the UK's biggest car-buying brand and has been helping buyers for more than 50 years. Our tests are widely regarded as the most independent and in-depth.

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Video chapters:
0:00 Most unreliable cars 2026!
0:35 How the Reliability Survey works
1:41 No.10 to No.6
5:24 No.5 to No.1
9:00 The 5 worst brands for reliability
10:48 Full results & tell us about your car!