Last week I parked next to a much older vehicle at work, and I saw this:

picture of old car window with rubber tab sticking out

It reminded me of my old 1995 Geo Prizm, which also had a tab like this on the leading edge of the front windows. However, I have not seen such a protuberance on any modern vehicle.

What is the purpose of this item, and why is it apparently no longer necessary?


1 Answer 1


As noted by @ Tim Nevins ; It guides the window. This is when there is no metal window frame at the top of the door and it is essentially a bare piece of glass that has limited guidance by the door.I think typical of less expensive cars but from limited observation.

  • "... no metal frame at the top of the door" is not correct. There are many examples - including my old Prizm, and a linked question - where there are large window frames.
    – Moshe Katz
    Commented Jan 30, 2020 at 23:09

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