This sounds like the plastic piece the glass mounts onto and then snap-mounts into the motor inside the sideview mirror housing(?)
I would start with:
How to replace passenger side view mirror on 2000 GMC Yukon?
Hi , we stock over 4500 replacement pieces of side view auto mirror glass. Just let us know what type of car you have. Thanks Jack
To replace the glass on a Mercedes C230 side view mirror, start by carefully prying off the mirror glass from the backing using a flat tool, being cautious not to damage the heating elements or backing plate. Once removed, clean the area and ensure the new mirror glass matches the original. Apply adhesive or clips as needed, and press the new glass into place firmly. Finally, test the mirror adjustment to ensure proper alignment.
To replace the side view mirror glass in a 2004 Nissan Titan, first, carefully pry off the mirror glass using a flat tool to avoid damaging the backing plate. Disconnect any electrical connectors if your mirror has heating elements or turn signals. Then, align the new mirror glass with the backing plate and press it into place until it clicks securely. Finally, reconnect any electrical connectors if necessary and test the mirror adjustments.
I expect that you can buy the mirror online but I had mine fixed at a local glass shop. They purchased or cut a mirror to fit and they glued it over the cracked one.
To replace the glass on the driver side view mirror of a 2001 Acura MDX, first, carefully pry off the mirror glass using a flathead screwdriver or a similar tool, being cautious not to damage the backing or the housing. Disconnect any electrical connectors if the mirror is powered. Then, align the new mirror glass with the backing and press it into place until it is secure. Finally, reconnect any electrical components if applicable and ensure the mirror is adjusted correctly.
Its called a Convex Mirror
Look at the mirror, and find the retainer screw. Loosen the screw and slide the mirror up, toward the roof of the car.
Wing mirror.
how to install Ford Ranger Driver Side View Mirror
No, it is the right side view mirror on 2002 subaru legacy
yes. You can replace just the glass or the whole assembly.