Bill, for whatever it's worth.
Traction control in an LR4 is insanely good compared to things of old - mine had no problem walking up cross-axled stuff that I'd think twice before attempting in my D1. So a rear locker, while nice, would not be a factor in my purchase decision. Neither is full-size spare - rims are aplenty and cheap.
Plastic crossover coolant pipes MUST be replaced for a 2013, nearly regardless of mileage. They just crumble. It is not difficult to replace, but a lot of work.
IIRC, it was done on my LR4 around 95-100kmi mark.
Timing chains - I'm listening to my LR4's engine whenever I am driving it or whenever my wife fires it up on her way to work. Don't remember the exact mileage - my guess is 117kmi - but I owned it since 17kmi, and never had more than 5kmi between the oil changes.
EAS - still on original airbags and Hitachi compressor (it's an early 2010). Had a couple of small issues, so I carry a spare pump and hoses in the truck.
LCA bushings - the replacement bushings seem to last 2 years/20kmi max. A shitty design coupled with shittier quality.
But... going up a 6% slope with 6 adults / full complement of ski gear at 8k ft - 80mph in the 6th gear, and 16 mpg overall. I almost drove it over the Imogene Pass in high range - only noticed that the gears are lower than I thought they should be and engine RPM a little higher.