Looking into buying an 2012 Armada SL with 38k miles. I'd love some advice on what to look for. Any problem or major issues? Anything to look for on test drive? Only problems I have turned up in research is exhaust manifold and steering bounce. At what point does the exhaust manifold typically start to,leak? Basically, any advice anyone can offer would be greatly appreciated. I am buying from a Nissan dealer.

get the carfax.
get the vin and go to a local dealer and find out it there are any recalls done or outstanding.

manifolds are the main major thing, other than maintenance. plenty of youtube videos on what this is. 2006 to 2015 armada search and use manifold in the string.

dont get one from the rust belt.