re: Value of car equal/less than recommended estimate maintenance.

Do some math.

If 2k gets you 12 months how does that compare to the amortized cost of replacement? Probably favorably?

Are there other parts likely to break soon and ruin the math? If you know your rough maintenance schedule and what things you will commonly have to replace at around that mileage you have more information

If you get another 12 months you can still sell it or trade it then. But I would be skeptical about the value you'd get back from a trade in with a car dealership. They lie and steal with the proclivity of politicians