* Loose mounting: The mirror might simply be loose on its mounting bracket. This is the easiest fix. You'll likely need to gently push the mirror back into place, possibly feeling for a click or a secure fit. You might need a second person to hold it in place while you check the mounting.
* Broken mounting bracket: The plastic bracket that holds the mirror to the windshield might be broken. In this case, you'll need to:
1. Assess the damage: Carefully inspect the bracket and the mirror itself for any cracks or broken pieces.
2. Replacement: You'll likely need a replacement mirror or, at least, the mounting bracket. You can try ordering parts from a Ford dealer, a parts supplier specializing in Ford Fiestas, or an online retailer. Providing your Fiesta's year and model will help them find the correct part.
3. Installation: This will involve carefully installing the new bracket or mirror assembly. The exact process will depend on the specific design of your Fiesta's mirror. You might find helpful videos on YouTube searching for "Ford Fiesta rearview mirror replacement [your year]". However, if you're not comfortable with this, take it to a professional.
* Windshield damage: If the windshield itself is damaged near the mirror's mounting point, this will require professional attention. The mirror is unlikely to stay fixed until the windshield is repaired.
Before attempting any repairs:
* Safety first: Park your car safely and turn off the ignition.
* Consult your owner's manual: This might have diagrams or instructions specific to your Fiesta's model.
* Take photos: Document the state of the mirror and its mounting before attempting repairs. This will be helpful if you need to order replacement parts.
If you're unsure about any aspect of the repair, it's best to take your Fiesta to a qualified mechanic or auto glass specialist. They have the tools and expertise to safely and correctly fix the mirror.