- Frame
- Molding
- Weatherstrip
- Lift arms
The cheapest option is to only replace the glass, but this requires removing the old window frame. This can be a complicated and time-consuming process, so it is not recommended for amateur mechanics. The next least expensive option is to replace just the frame, but if the molding, weather stripping and lift arms are worn, it may be best to just replace the whole rear window assembly.
You can find rear windows or just glass for as low as $25 up to over $350.