Alright so I'm about to buy a G37 2010, the car has 18k miles but right under that number there is an 'A' with the number 82k next to it right under the miles. What is that? I have no clue.

 

I think what you are referring to are the two odometer settings A&B
There is a button on the dash to toggle/reset them
See owners manual

Telcoman

 

This.
It's a separate odometer to track a trip length...I don't see how in two years you can stack up 82k miles...but it almost seems like they wound their miles back but forgot to reset the trip odometer...?
Maybe it's a glitch?

 

Well your trip meter (A) should never have more miles than the actual odometer has ... something sounds fishy.

 

a picture is worth a thousand assumptions

 

Im sure its "trip A" if its 18xxx miles on the odo its 82xx.x on the trip A.

 

ding ding

 

If something isn't fishy how can the odometer have 18k miles but the trip A odometer have 82k?

 

 

You're probably reading trip A incorrectly. Even if someone decided to roll back the odometer, they possibly couldnt be dumb enough to leave the trip A meter at 82,000miles. Not to mention who in the world leaves their trip meters on for 82k? Maybe OP didnt notice the decimal???

Also, whats the number next to "A" exactly as it is written? "82,000" or "82k".. if its "82k", it could possibly be 82kilometers, but if i remember correctly from my dash, it just has a number, and doesnt indicate miles or kilometers. Maybe if you can switch settings to kilometers, the dash indicates it with a "k" next to the number. But im not even sure if you can switch back n forth. Never tried.

 

Pictures would help