If you have a 2012, 2013, or 2014 Passat 2.0L TDI and got the approved emissions modification, Volkswagen has identified a potential problem with the “fix” it installed on your car that needs your immediate attention. If you have one of those vehicles but haven’t gotten the modification, you must make an important decision very soon. You’ll be getting a detailed letter in the mail from VW about this, but in the meantime, here are some key facts.