One problem related to gas recirculation valve (egr valve) has been reported for the 2007 Volkswagen Passat. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Volkswagen Passat based on all problems reported for the 2007 Passat.
My 2007 vw Passat wagon has 3 times on trips longer than 4 hours in 0 degree weather started chugging and shaking on the highway. Each time has been worse and lasted longer. The first time a call to a vw dealer said it was the gas cap and it would be ok. The second time a Subaru mechanic diagnosed misfiring and a bad coil so I took it to a vw dealer who said there was nothing they could find wrong to fix. The third time I was nearly stranded on a remote highway. I eventually got home to my private mechanic who agreed it was misfiring and a bad coil and will fix it.