Two problems related to engine exhaust system have 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 16 bought a car from bommarito vw hazelwood, they told us it had prior engine work and the customer couldn't pay for the charges so they sold us the car. When test driving we heard a clunk every time you would excel. The salesman said it was stuff in the trunk. Come to find out there are no motor mounts holding the motor and the motor goes up in the air when you give the car gas, the motor hit the exhaust and broke it. There is no way this car passed inspection with a motor hanging there, you can't see through the back window because the tint is so bad. A dealership should not of sold a vehicle with a motor like this, it's a bit dangerous to put a young girl in. It has taken me two weeks for someone to call me back.
The weld beads on the down pipe flange adjacent to the turbo charger failed and resulted in a huge exhaust leak. The heat (coming out from the opening) got trapped in the engine bay and melted the vacuum hose connected with the brake booster. As a result, power decreased but most importantly, breaking power was lost as well. This happened when the vehicle was in motion. Luckily, I was not driving fast and just exited the highway. Very dangerous and the defect on this model is actually not uncommon. Low quality factory welds on the components should be re-welded and the cheap hard plastic hoses should be replaced with better quality and more reliable hoses.