Driveing our 2009 X5 Diesel last week, accelerated reasonably hard to overtake and the fuel return line burst at No1 injector. Can anyone think of anythng that can casue this, ie; increased fuel pressure on acceleration?

It leaked from the fitting that goes on top of the inject, and it looks like you have to buy the whole fuel line to reapir.

Thnaks in advance for any help