My 04 V8 has 172K now. I love it but I can't decide if I'm going to do the 180K maintenance (timing belt, water pump, etc) or sell it. I have kept up with all the recommended maintenance. Everything works and it runs fine.
My concerns are the sealed "lifetime" transmission and the overly expensive master cylinder. I'm pretty sure the engine is good for 200K more. It still doesn't burn any measurable oil between 5K changes (about every 2 months)
My Toyota dealer says with 170K, don't touch the transmission fluid or more problems may occur. They don't recommend the drain and fill either.
The only brake issues I've had are the frozen caliper problems common to this model. I have replaced both fronts twice and the rear's once in the past 5 years.
I am leaning toward selling it in good condition before any potential problems, where I can still get $5 to $6K for it. I could put about $600 in maintenance and roll the dice, but if something major dies (I'm not going to put in a new transmission) I'd sell it for parts and be out $4K that could have gone to something newer.
My local dealer had some 5th gen 4runners as loaners so last time I was in for service I took a 2016 for a day. I was so hopeful I would love it but ended up hating it. After much research it looks like my best bet is a used Lexus GX 460 for about what a new 4runner goes for.
So, my question is for all you high mileage owners, are you on the original transmission fluid? What is lifetime for this fluid? 200K? 250K?