Diesel Vehicles: All 2007 model year and newer diesel powered vehicles with a GVWR of up to 14,000 lbs are required to undergo emissions inspections. Exemptions: 1. Vehicles manufactured before 1996 2. The newest 3 model year vehicles 2. Vehicles manufactured after 1996 that are not OBDII-compliant (must be verified at a test station). 3.