2015 Volkswagen Passat

The heater core becomes clogged and limits heat available for windshield defogging and defrosting. This creates a visibility hazard during inclement weather and makes the cabin uncomfortable during cold weather. The heater core was diagnosed and replaced on this vehicle in December 2024. The same symptoms have returned in December 2025. Volkwagen issued TSB VWP-16-05 to remedy this same issue in 2013-2014 Passats. I own a 2015 Passat. 2015 Passats have the same symptoms and problems.

The heater core becomes clogged and limits heat available for defrosting the windshield. The heat available is insufficient to defrost and maintain visibility while driving under adverse conditions. The cabin also becomes uncomfortable because of limited heat during cold weather operation. Volkwagen issued TSB VWP-16-05 for this issue for this model for the model year prior to my car. I had this issue repaired in December 2024. The same problem and symptoms have returned in December 2025.

I have a 2015 Volkswagen Passat TDI that I purchased in 2018. The car has no heat and needs a second heater core replacement, currently with 85,565. In researching the issue, i found the Warranty extension on the NTSB website Number: VWP-16-05 that covers model years 2013 and 2014 prior to my model. As winter approaches, lack of heat for the windshield creates visibility issues in cold, wet, and snowy weather. I am limiting the use of the vehicle until i can get a repair. In February of 2022, a dealership replaced the heater core in my vehicle at 48,471 miles, and I paid $633.07 for that portion of the service. The car started to display the issue again in February of 2024, I returned to the same dealership, and was quoted $1977 to repair the issue, which I declined at that time. I ask that the case be reviewed and 2015 model year be added to the extended warranty.

A coolant issue related with an TDi engine clogged my heater and the car is frosting from inside. There are many Passat owners that have or has the same issue and VW even made an extended warranty buletin for the 2012-2014 Passats, Now, the 2015 suffers from the same issue and they want to charge us for flushing the coolant 3 times and change the heater! The car still have the power train warranty and extended warranty for the TDI engines. Just a simple google search Passat heater core will show how many they are and dealers are making easy money cause they done so many times. As is now my wife drives the car during freezing mornings with two toddlers and condensation and frozen windows affects the visibility! Unacceptable for a car with 51.000 miles when is no require in the service book to change coolant to prevent this and what causes that, cause is not something that I could do to prevent it, it’s just the nature of their poor design of their coolant system. And changing the heater core without looking what caused that and only to rip money from their customers. I’m requesting your assistance to get my car fixed and have my family safe and have VW to investigate the cause and come with a solution to prevent this!

I HAD RECENTLY SCANNED MY VEHICLE WITH A DIAGNOSTIC SCANNER BECAUSE MY WINDOW WASHERS WERE NOT SPRAYING TO CLEAR THE WINDSHIELD WHEN MANUALLY ACTIVATED BY THE STALK. THE CODE SHOWS A SHORT IN THE CIRCUIT SOMEWHERE BETWEEN THE STALK AND THE WASHER PUMP. I TRIED REPLACING THE PUMP BUT SAME OUTCOME NO WASHER FLUID WOULD DISPENSE THIS IS A VERY BIG INCONVENIENCE MOSTLY BECAUSE WHERE I LIVE MOST COMMUTES ARE PART HIGHWAY AND PART SIDEROADS/ DIRT ROADS, SO THINGS START TO GET DIRTY AND VISIBILITY IS DRAMATICALLY REDUCED. IM REALLY NOT TRYING TO PAY FOR A HARNESS OR TO GET THE LOOM PULLED APART TO FIND THE BUG. TO KEEP EVERYTHING LOOKING STOCK

TL* THE CONTACT OWNS A 2015 VOLKSWAGEN PASSAT. THE CONTACT STATED THAT THE VEHICLE'S DEFROSTER DID NOT FUNCTION CORRECTLY. THE VEHICLE WAS TAKEN TO AN UNKNOWN LOCAL DEALER WHERE IT WAS DIAGNOSED THAT THE AIR COMPRESSOR NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 65,320.