RUST if they aint looked after properly!!!
(took me a while to find a good one!)

If 4x4s have standard brakes and aint good quality discs they can warp
fairly easy..


the engines seem Very good,
the gaskets do leak, but once replaced they seem ok!


but as Stu said, looked after they are pretty fault free

had mine a year and half, and the ONLY FAULT that saw it off the road
was when the battery died one day.