Yes, covered by warranty this time but when the warranty is up you are stuck paying £2,300.
Probably 15-20% of the cars value when 3 years old.
Most of the cost was parts, labour was under £100 to change the unit.
However, it's the biggest repair cost of any car I've owned - which includes 10-12 year old cars with over 100k miles.
I'm most unimpressed that it failed - the Jazz was my first brand new car, and specifically bought so I wouldn't have any issues at all. All I wanted was to visit the dealer every 12.5k miles to have a service, and not see a garage anytime else.