DIAGNOSE first.

Asking WHEN is kinda like asking "How long is a piece of string"? Needs to be "measured"..........

 

Yes, but old is old. I replaced everything up front (suspension) soon after I bought my Jeep with 120,000 miles and original everything. My 21 year old radiator just started leaking a couple of days ago. I should have replaced it when I did the water pump, but I wanted to see how long the original would last. I'm glad I was 2 miles from home when it started leaking.

 

4ft +/- 3ft depending on how far away you hold the ruler.

 

Inspect your vehicle on a regular basis and you will notice when parts start to wear out. Giving you a mileage for parts wear/breakage isn't realistic, there are way too many variables to take into account.

 

Yes, type of usage has a lot to do with parts wearing out, like the difference between just street DD usage and off-roading as extremes. Just to make a point, I use my 2000 WJ and my 2000 XJ to deliver newspapers and slow maneuvering around mailboxes and constant U-turns and K-turns wear out tires and brakes quickly. I usually only get about 1/2 the mileage on tire treadwear that daily street driving gets other people. My front tires wear quicker than the rears even with good alignment.

 

Hahaha you said K-turn. Never heard it called that. Must be local dialect from the NE. Apparently it's also called a "Y-turn, and a "broken U-turn" aside from "3-point turn".
OK back on track...