I'm astonished that the Corsa is one of the worst offenders. Mine was bought by my dad in 1996, and I bought it off him in 2006, when I sold my good car (my mum had cancer, it paid for a really nice last Christmas for her) . I was expecting some shonky old banger, but I had all the service history and knew it personally, from 1996 to when I sold it last year:
2 Batteries
1 Exhaust
1 Cam belt
1 Selector rod
1 Speedo
5 Tyres
Mileage: 130,000
Total number of roadside failures: 0
Brilliant bit of engineering, even when I sold it the thing went like a new car!
Some old fella in Devon owns it now, he got a bargain.
I'm with LGF, I reckon the failure rate is indicative of how well various car owners look after their cars.