Z4 Got rear-ended.. keyless entry stopped working?

So my 03 2.5 z4 got rearended.. theres some minor bumper damage.. the weird thing is none of my keyless stuff works now (locks, trunk). anyone had anything like this happen before? it isnt some weird quick fix, is it? if so i could replace the bumper myself and pocket the insurance check.

im assuming its some kind of electrical damage and beyond the grasp of what i can handle but i just want to make sure....