You said it, proper maintenance and cleaning. Change the fluids (axles, engine oil, and coolant) and on a regular schedule. Change the spark plugs according the maintenance schedule. Replace worn out brake pads, rotors, and any steering components when the parts wear out.
I did all of this to my 2003 Toyota Tacoma that I recently traded in and it still drove great even with 190,000 miles on it. I also washed it often and waxed it once a year. It was still bright and shiny when I traded it for my Jeep.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!