Most and least reliable small carsSupermini reliability: best and worst

10 December 2014

Want to know which superminis and city cars you can rely on, and which are likely to let you down? We reveal the three most and least reliable new and older small cars.

Be in with a chance of winning £2,500 – tell us how reliable your car has been in the last 12 months in the 2015 Which? Car Survey.

Car reliability: reliability scores for 283 different models in our best and worst reliability tables.

Most and least reliable new small cars

The now-replaced Citroen C1 (2005-2013) was the most reliable small car up to three years old in last year’s survey, with an outstanding reliability score of 99%.

The Honda Jazz Hybrid (2011-) very nearly matched the C1. Like the Citroen, it scored 99% for reliability. And not a single Jazz Hybrid we received feedback on had suffered a breakdown in the previous 12 months. A super-low 0.04 faults per car shows just how sturdy the Jazz is, although it cost owners £6 a year on average to rectify non-warranty issues – more than the C1.

The standard Honda Jazz (2008-) was third best for reliability with a 98% score. Just 1% of models broke down the during the 12-month period.

Least reliable new small cars: Volkswagen Polo diesel (2009-) 82%, Kia Rio diesel (2011-) 86%, Kia Picanto (2011-) 86%

Most and least reliable older small cars

Reliability is generally a bigger concern with older cars, especially those outside the warranty period, meaning owners have to cover the cost of all repairs. That’s why we also rate the reliability of cars older than three years (and up to eight years old).

No surprise – the Honda Jazz (2008-) is top of the list. Models older than three years cost owners £16 on average in repairs and achieved a reliability score of 96%.

The Toyota iQ (2008-2014) came second with a 95% reliability score, closely followed by the Ford Fiesta petrol (2008-) on 94%.

Least reliable older small cars: Ford Fiesta diesel (2002-2008) 69%, Fiat Punto (2006-) 72%, Peugeot 207 diesel (2006-2014) 75%

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