* Loose/wobbly: This is often the easiest fix. It might just need tightening a screw or two (accessible from the inside of the car door panel, often requiring removal of the panel).
* Broken glass: Replacing the glass itself is relatively inexpensive and can be done at home if you can find a replacement glass and have a little patience. However, it usually requires removing the mirror housing.
* Electrical issue (heated mirror not working): This could involve checking fuses, wiring, or even the switch itself. This is more involved and requires some basic electrical knowledge.
* Completely broken housing: This usually requires replacing the entire mirror assembly, which might be more challenging.
DIY Difficulty: If it's a loose screw, it's easy. If it's a broken mirror glass, it's moderately difficult. If it's a complete failure of the housing or electrical components, it's more difficult, requiring more mechanical and/or electrical skills. You'll need basic hand tools for any of these repairs (screwdrivers, possibly a trim removal tool). Online repair videos for your specific car model can be helpful.
Shop Cost: The cost at a shop will vary greatly depending on the repair needed and location.
* Tightening a screw: Might be free if you mention it during another service, or a very small fee.
* Replacing the glass: Could range from $20-$50 for parts plus labor (perhaps $50-$150 total).
* Replacing the entire assembly: Could be $100-$300 or more, depending on the part cost and labor rates in your area. They may even charge for diagnosis time before stating the needed repair.
Recommendation: Before attempting a DIY repair, search YouTube for "2002 Chevy Cavalier driver side mirror repair" to see if the problem matches a video tutorial. This will help assess the difficulty and if you are comfortable tackling it yourself. If you're unsure or uncomfortable with any car repairs, taking it to a shop is always the safest option. Get a few estimates before committing to a repair.