I believe that repair wrenches should be added back in. My reasoning for this is that it is really annoying to have to get your vehicle towed any time something happens to it. Most times, there isn't even a tow truck driver on, which makes it pretty difficult to get a tow.

To counter the overpowered factor of the wrench you could make it have a cast time (similar to gas being pumped), and make them slightly more expensive. But honestly, they're a pretty necessary part of owning a vehicle. Perhaps you could raise the skill requirement on them as well, and possibly add a skill requirement to use them?