Quote:
Originally Posted by gnu
I'm happy not to have one, as cars I've had them on tended to start to leak as the car got older. I never opened them anyway.  |
OEM are expected to leak a little which is why they have drains. They are made to pass through the hole in the roof, so cannot make a perfect seal.
After market ones have to be designed to form a complete seal and in time can leak, but as they have no drains
