I have a 2006 Range Rover Supercharged whose passenger-side catalytic converter was cut off while it sat in the back of my mechanic's lot. I'm pissed as hell because now I'm out the price to replace that. The thieves weren't particularly delicate about how they did it and appear to have also sliced off the wiring for the fore and aft 02 sensors. How would I go about repairing the wiring myself?

 

Honestly? Your mechanic should be on the hook for that fix since he didn't secure the lot.