I've had 2 that have had cutting out issues, luckily, both times, it's been down to the fuel filter not being tight enough, and it drawing in air. The 2002 2.5 had the filter at the rear, our 2006 has it up in the engine bay. I think the wiring issue is caused by the housing cracking, which can let in air. It can also let out fuel, which causes the fault with the wiring.