What's the most expensive car repair bill you have ever had?

[Wacky Racer]

As per thread title.

I'm not talking about accident damage, but a huge bill to repair a fault on a car you owned where you paid it out of your own pocket....(or on credit card if you were financially embarrassed at the time).

[Wacky Racer]

Some serious horror stories here, cheers for the replies.

Keep 'em coming.........