37mm Festoon CANBUS LED Light Bulb Compatible With BMW Mercedes Audi VW 6418 6411 C5W 4 Pack

The customer experience surrounding this LED bulb product has been notably mixed. Users have praised the brightness, design, and color quality, particularly in vehicles like the Volkswagen Jetta and Audi A4, where they served as effective license plate lights. Many appreciate the clean white light emitted and find it an excellent replacement for traditional bulbs. However, the product does have its shortcomings. A significant concern is the reported sizing discrepancy; while marketed as 37mm, several customers measured them at 36mm, leading to fitting issues in certain fixtures. Users noted that this can result in the bulbs being loose if not installed with additional pressure on the contacts. Additionally, compatibility issues arose, particularly with luxury brands like Mercedes, which led to flickering and dashboard error messages that frustrated several buyers. Notably, there is a lack of clear markings for positive and negative connections, which has caused confusion during installation for some customers, as reversing polarity can render the bulbs nonfunctional. Durability has also been a point of contention, with reports of bulbs failing after a relatively short lifespan, particularly in harsh environments, such as colder climates and when used as daytime running lights. Buyers have mixed feelings about longevity, with some noting a lifespan of only a year or a bit longer. Overall, while many users find these LED bulbs aesthetically pleasing and functional for certain applications, potential purchasers should be aware of the fitting issues, compatibility limitations, and durability concerns when Considering these bulbs for use in their vehicles. **