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I would consider all except the radiator, steering rack, and transmission pan drain bolt to be preventative maintenance. The rest I would consider to be wear and tear items. Seals and bushings won't last forever but they seem to last longer than most.
YES, some are preventative and some are wear-n-tear
BUT it does not matter because pretty much all of those items will need replacing by 200k-225k miles unless you are ok with the "drive it till it dies" style of vehicle ownership.
ALSO, I believe that a lot of the vehicles on the used market have not had those items completed.
What often happens is 1+ major items goes bad at 120-150k miles costing the owner at least
$500 or
$750 to fix and they decide to sell. Sometimes he/she will do the right thing and have a good mechanic do the job using OEM parts but MORE OFTEN they go cheap with cheapo parts
and then sell it. Hence my statement that vehicles for sale @ 150k mile mark (around there) rarely have had those items replaced. Especially since most of the failures will occur post 150k miles and not before. This is especially true of trade-in vehicles where the dealer/reseller fixes as little as possible for as cheap as possible and then sells it.
I am just warning the OP that the while Buyers Guide is a good guide of what to look out for when buying a truck, it is old and just because the seals
($800-$1200) haven't gone bad at 140k miles or 155k miles it isn't a sign that you are good. TRUST ME they will go bad by 200k miles. Just because the LBJs
($450-$600) haven't gone bad at 150k miles TRUST ME you will want to replace them before 200k miles for safety sake. The same can be said about the brakes
($600-$800) and the waterpump
($500) and the suspension
($1000+) and the steering rack
($600-$700) and radiator
($500) PLUS much more.
The items listed in this paragraph based on my estimate will total to about $4500-$5000 to have repaired by a proper Toyota shop, possibly more if you go to a dealer. This work would probably occur over 5 years so say $1000 per year in maintenance ... not that bad but I want you-all to be aware. Those numbers also don't account for a trans or head gasket failure, both of which are valid risks around the 200k mile mark.
I am not jaded but I am a realist who has owned his 4Runner 2002. In 11 years of ownership I have seen a lot. I love my truck but people need to be realistic. 200k miles is a great lifespan for all parts on a truck. It is perfectly reasonable for your HEADS to crack
($1200+ per side) or gaskets
($600-$800 per side) to break or LBJs to fail or a trans to fail or a RAD to fail ect at 200k miles. You have to be realistic.
Think of the buyers guide as a guide to what will probably fail by 200 or 225k miles... Back when it was written more of the trucks on T4R had around 100k miles and those warnings applied well. But now that so many are at 150k + miles it is more of a "likely to fail guide" than a "buyers guide". We also now see far more daily "my truck's XXX is broke please help" threads on T4R than 2-4 years ago.
NOW if you can do the work yourself then you will have much lower costs.. If you have the tools and patience then all the information you need can be found on this website (or similar). You could order the OEM parts from a online dealership like Camelbak Toyota for ~ 25% less than normal dealer prices. Then these costs go down dramatically. It just depends on what type of owner you will be.
The 4Runner is a great vehicle but some parts will just need to be replaced. I am still amazed by how little (and it was a lot of $$) I have actually replaced, how much still works 100% at 217k miles. Pretty much everything on the truck works 100% except what I mentioned above, most of which IS in the buyers guide.
===> Try to find one with as low miles as possible, plan for (via a savings account) several $$$ repairs to be needed before you hit 200k miles mark and enjoy the great truck that you have. At least with a 4Runner it will make it to 200k which is a lot more than can be said about other SUVs on the road today. With proper maintenace and repairs you can go beyond the 200k mark, well into 300+ and beyond.
Just my 2-cents based on 11 years ownership.
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