How many miles are too many on an Acura TLX typically

8 year old car at 15K per year, so 120K is average. Acura is a Honda so they usually will go 200K without anything major if they have been maintained.

This is a tough question because driving habits like racing or driving only 35 has very different wear and tear on a car. Look for a Honda forum that has a consumer report section and also look for recalls. Like GA wrote 200k is easy on these cars, my Nissan had 300k+ and no real problems. I've seen Honda's with 400k and barely burning oil.