The newest ones have DPF's just like our trucks....personally I would try to find one pre-dpf which I believe is 2007? But I understand if she's trading her nitro in that might not be feesible. Just a suggestion. When someone ask's me about looking for a TDI I recommend 99-06 because of interior room and EGR is the only emissions downfall and it is easily removed. There is a ton of aftermarket stuff out there also tuners, injectors, turbo's, clutches,etc...