BMW one series - hit into another vehicles rear end ..?

Ok, so long story short i was driving and approaching a roundabout and the vehicle in-front of me braked and i went into the vehicle probably 30mph and then braking with it too and didn't help the tw*t was reversing too ._. SO, i’m looking for rough estimates on repair? No leaks, sounds and drives the same.... show more Ok, so long story short i was driving and approaching a roundabout and the vehicle in-front of me braked and i went into the vehicle probably 30mph and then braking with it too and didn't help the tw*t was reversing too ._. SO, i’m looking for rough estimates on repair? No leaks, sounds and drives the same.

For those wondering, i didn't want to take it through insurance as long term it would f*ck me up anyway. Thank you all x

Bmw one series 2008 model.
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