Range Rover TDV8 4.4 - Intake manifold leakage

I have a Range Rover TD V8 Autobiography 2011. The engine just went into restricted mode and I got a fault code of P006A; Manifold absolute pressure and P1247; Turbo boost pressure low. I checked the engine and noticed some air leaking from the LH intake manifold. I've ordered the part but I'm wondering what could have caused it to leak or crack. Any idea? Also would the change be a DIY, anything to watch out for?
I'm here in Bhutan so no dealer support. Need all the help I can get. Thanks