Volkswagen GTI carbon build up, fuel injector failure under warranty, foul odour from AC, and frequent headlight bulb failure on Volkswagen GTI

Some Volkswagen GTI owners report experiencing issues such as carbon build-up in their engines, which can negatively impact performance and fuel efficiency. Additionally, there have been reports of fuel injector failures, some of which were covered under warranty, indicating potential reliability concerns with this component. Some owners also complain of a foul odor coming from the AC system, likely due to mold or bacteria growth. Furthermore, frequent headlight bulb failures have been noted, leading to more frequent replacements than anticipated. These issues highlight the importance of regular maintenance and vigilance regarding these specific concerns when owning a Volkswagen GTI.