Hi. Sorry to be critical here but here is my input to you.
You are new here because you blown a piston ring:
So if you didnt blow a piston ring - you wont be here joining our board?
You did drive your car properly and that is probably why you blew a piston ring?
Sorry, that simply doesnt make sense at all.
Can it be rebuilt?
Of course. Any engine can be rebuilt.
Does anyone know where?
Sure, try your local BMW repair shop.
I mean your question should be "I am here in (ex) San Diego, California. Does anyone have a BMW repair shop they can recommend?"
Sorry but with the questions you posted - no wonder not very many members, actually none reply to you.
You need to learn how to post questions properly so that members here can try and help you.
Hello to all . I'm new on here because I've blown a piston ring on my e60 M5 its an 05 with only 65,000 on it but I did drive it properly so this is probably why .. can it be rebuilt?? and does anyone know where ?? thanks loads