I define reliability as whether or not it starts and does what I want it to do - i.e. get me from A-B. In that, my car has been 99.9% reliable in 5.5 years and 57k miles.

It has had a few issues that needed fixing, mainly suspension related, but none of that has affected reliability. The one issue that stopped me using the car was a burst/corroded rear brake pipe. Even having to stop in Central London after my water in fuel sensor broke was not down to the car but the mechanic who swapped out the filter.