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As someone who just bought a CPO vehicle with the same engine and year (46k) miles... I would expect many trouble free miles so long as you do your homework on prior service history (looks like you have) and continue to maintain the vehicle properly into the future.

Ive owned two N20's (2014 and 2016) and neither has given me any trouble at all other than a coolant thermostat on the 2014 that was covered under warranty. Would still be driving the 2014 if it wasn't totaled by insurance at 95k miles. Planning to keep the 2016 for 200k miles or better, knock on wood!

I change my oil every 5k miles, run the best fuel I can find (usually Shell VPower 93) and drive very easy when engine is cold, thats about it.