Disc Brake problem

[weegeoff]

I think I have a crack in one of my rear disc. Has anyone replaced any rear discs. A little bit of advice would be help full.
thanks in advance :x

 

[ori]

How the hell have you cracked a rear disc?

I’d would try going down warranty first. Might get declined, but worth and ask?

 

[weegeoff]

The car is 2019 well out warranty. I found a vid on u tube and I have a friend who has a thingy that winds the pistons back. Now looking for discs and pads. I have done this job before but on older cars which were simple