Hi I have a 2009 Nissan Altima with weird badging

I’m in the process of getting repairs done to my Altima bc I need it to last me another year and a half at least. The issue is that part sites and mechanics have never heard of my Classification of vehicle. I have a 2009 Nissan Altima 2.5SL however online and on the databases of these shops they’ve never heard of that model of the car bc apparently the only SL Altima is a 3.5 but my badges say 2.5 this has on two occasions so far caused me to buy incorrect parts that don’t fit, is there anyway to better identify my model so I can get thr correct parts