The most reliable cars of 2006

Every 2006 car tested in Britain in one year, ranked by how often it failed. Measured, not surveyed.

Best

#	Car	Engine	Failure rate	Tests
1	Aston Martin V8 Vantage	4.3 Petrol	9%	979
2	Aston Martin DB9	5.9 Petrol	10%	643
3	Bentley Continental	6.0 Petrol	10%	1,260
4	Porsche 911	3.6 Petrol	11%	878
5	Porsche 911	3.8 Petrol	12%	2,208
6	Honda S2000	2.0 Petrol	12%	630
7	Porsche Boxster	2.7 Petrol	14%	1,292
8	Audi A4	4.2 Petrol	15%	987
9	Toyota Alphard	2.4 Hybrid	16%	928
10	Porsche Boxster	3.2 Petrol	16%	579
11	Porsche Cayman	3.4 Petrol	16%	1,419
12	BMW Z4	3.0 Petrol	17%	1,048
13	Porsche Cayenne	4.5 Petrol	18%	620
14	Jaguar XK	4.2 Petrol	18%	2,095
15	Lexus IS250	2.5 Petrol	18%	2,260
16	Toyota Corolla	1.8 Petrol	18%	2,102
17	BMW 3 Series	3.0 Petrol	18%	2,561
18	Toyota Estima	2.4 Petrol	18%	568
19	BMW 6 Series	4.8 Petrol	19%	522
20	Toyota MR2	1.8 Petrol	19%	856
21	Nissan Elgrand	2.5 Petrol	19%	504
22	Honda Civic	2.0 Petrol	19%	594
23	Lexus RX400H	3.3 Hybrid	19%	1,806
24	Audi A6	3.0 Diesel	19%	767
25	Land Rover Range Rover Sport	4.2 Petrol	19%	1,041

Worst

#	Car	Engine	Failure rate	Tests
1	Mazda Bongo	2.5 Diesel	37%	911
2	Renault Megane	1.5 Diesel	35%	1,478
3	Mazda 5	2.0 Petrol	35%	742
4	Seat Alhambra	2.0 Diesel	35%	513
5	Renault Megane	1.9 Diesel	35%	630
6	Peugeot Expert	2.0 Diesel	34%	1,119
7	Vauxhall Combo	1.7 Diesel	34%	1,305
8	Hyundai Tucson	2.0 Petrol	34%	688
9	Volkswagen Beetle	1.6 Petrol	33%	2,553
10	Ford KA	1.3 Petrol	33%	4,453
11	Volkswagen Sharan	1.9 Diesel	33%	851
12	Chevrolet Matiz	1.0 Petrol	33%	1,434
13	Renault Modus	1.5 Diesel	33%	705
14	Ford S-Max	2.0 Diesel	33%	1,590
15	Renault Trafic	2.0 Diesel	33%	557
16	Vauxhall Combo	1.2 Diesel	33%	4,686
17	Ford S-Max	1.8 Diesel	33%	744
18	Peugeot 307	1.6 Diesel	33%	3,953
19	Vauxhall Meriva	1.7 Diesel	33%	564
20	Fiat Panda	1.2 Diesel	33%	543
21	Vauxhall Vivaro	1.9 Diesel	33%	11,199
22	Nissan Note	1.5 Diesel	33%	558
23	KIA Sportage	2.0 Diesel	33%	1,396
24	Ford Transit Connect	1.8 Diesel	33%	11,770
25	Chevrolet Kalos	1.4 Petrol	33%	679

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 2006 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.