I have a 16 w 150k on it. In the past 20k I've rebuilt the front end pretty much from unit bearing to unit bearing. I drive the hell out of it and have no concerns driving all over w it. At 180k I'd try and get what the dealer noted. I'd look for signs of wear/parts replaced. 34k sounds responsible but you will be replacing some parts soon if they haven't been done yet. Also look for rust in the wheel wells/underside/rockers. Try and get some type of warranty that will cover stuff for at least 30-60 days. That way is the dpf is full 20 miles from the dealer you have some recourse. Some people may think it's high but considering it's 80-95k to buy a nicer model now, 34k is reasonable.