Where do the majority of passenger compartment water leaks occur?

The majority of passenger compartment water leaks occur at glass to metal joints. This is primarily due to the way vehicles are constructed, where windows and other glass components are fitted into the frame of the car. Over time, the seals and adhesives used to secure the glass can deteriorate or become damaged, allowing water to seep through. These joints are critical points for leaks because they not only have a direct exposure to environmental elements but also bear the stress of temperature changes and vibrations from the road.

The design of these areas, combined with wear and tear, means that they are often the first places to experience issues, such as cracked seals or improper installation. This can lead to water accumulation in the passenger compartment, creating issues like mold growth, electrical problems, and damage to upholstery and other interior components.

Understanding that glass to metal joints are typically more prone to leaks can be crucial for preventative measures and repairs, ensuring that vehicle owners maintain their automobiles effectively.