My 2006 zd30 has had issues with clutch (two part flywheel now replaced with a solid unit) and the dreaded water leak behind the front engine covers. Both expensive and plenty of comments that these are common (not sure what "common" means). Replaced starter at 120,000 km.
Look for water leaks behind alternator--that is a BAD sign.
We have USED our truck--Simpson last year--and towed our heavy camper without issues.
I'd say many grenades are due to poor treatment or neglecting to install NADS.