Wheel Bearing Broken After 10 Days


My 2002 Ford Ka recently failed it MOT due to the NSR Wheel beaing.

This was replaced by a main dealer. They then passed the MOT.

The wheel bearing is now 'shot' after 10 days and no accident or any abnormal driving.

I presume this isnt normal. The vehicle is now at home waiting to be recovered. Am I liable for any costs?

Ive read above that it should now last for life...not 10 days.

Thank you for your help