The most reliable cars of 2007

Every 2007 car tested in Britain in one year, ranked by how often it failed. Measured, not surveyed.

Best

#	Car	Engine	Failure rate	Tests
1	Bentley Continental	6.0 Petrol	8%	1,451
2	Porsche 911	3.6 Petrol	8%	1,096
3	Aston Martin DB9	5.9 Petrol	9%	714
4	Aston Martin V8 Vantage	4.3 Petrol	10%	760
5	Porsche 911	3.8 Petrol	11%	1,571
6	Porsche Boxster	2.7 Petrol	12%	994
7	Porsche Boxster	3.4 Petrol	14%	827
8	Honda S2000	2.0 Petrol	14%	550
9	Toyota Alphard	2.4 Hybrid	14%	953
10	Audi A4	4.2 Petrol	15%	989
11	Porsche Cayman	2.7 Petrol	15%	884
12	Mercedes-Benz SL-Class	3.5 Petrol	15%	626
13	Porsche Cayman	3.4 Petrol	15%	754
14	Fiat Ducato	2.3 Diesel	16%	3,146
15	BMW Z4	3.0 Petrol	16%	1,376
16	Fiat Ducato	3.0 Diesel	17%	1,161
17	Honda Civic	1.3 Hybrid	17%	621
18	Land Rover Range Rover	4.2 Petrol	18%	573
19	Lexus IS250	2.5 Petrol	18%	2,419
20	BMW 7 Series	3.0 Diesel	18%	630
21	Lexus RX400H	3.3 Hybrid	18%	2,583
22	BMW 5 Series	2.5 Petrol	18%	558
23	Toyota Estima	2.4 Petrol	18%	605
24	Audi Q7	3.0 Diesel	18%	3,597
25	BMW 6 Series	3.0 Petrol	18%	968

Worst

#	Car	Engine	Failure rate	Tests
1	Mazda Bongo	2.5 Diesel	35%	987
2	Renault Megane	1.9 Diesel	35%	807
3	Mazda 5	2.0 Petrol	35%	1,745
4	Fiat Scudo	2.0 Diesel	35%	1,108
5	Nissan Qashqai	2.0 Diesel	35%	1,316
6	Nissan Qashqai	1.5 Diesel	35%	3,066
7	Renault Megane	1.4 Petrol	34%	986
8	Nissan Qashqai	1.6 Petrol	34%	6,977
9	Peugeot 308	1.6 Petrol	34%	591
10	Seat Alhambra	2.0 Diesel	34%	618
11	Ford KA	1.3 Petrol	34%	6,786
12	Renault Megane	1.5 Diesel	34%	2,221
13	Chevrolet Lacetti	1.6 Petrol	34%	551
14	Mazda 5	1.8 Petrol	34%	677
15	Chevrolet Kalos	1.4 Petrol	34%	756
16	Renault Clio	1.4 Petrol	33%	7,332
17	Volkswagen Beetle	1.6 Petrol	33%	2,488
18	Renault Grand Scenic	1.6 Petrol	33%	707
19	Vauxhall Vivaro	2.0 Diesel	33%	11,162
20	Peugeot 308	1.6 Diesel	33%	806
21	Vauxhall Combo	1.2 Diesel	33%	5,698
22	Renault Laguna	2.0 Diesel	33%	954
23	Renault Clio	1.5 Diesel	33%	3,832
24	Vauxhall Antara	2.0 Diesel	33%	598
25	Citroen C4	1.7 Petrol	33%	675

What this measures

Britain tests every car over three years old against a published standard and publishes the result. This is that record for the 2007 model year, so every car here is the same age and none is flattered by being newer.

A car driven less fails less. An expensive one often sits high for reasons that are not about how well it was built, which is why the app can rank these at the same odometer reading.