If your Ford Focus begins to open doors poorly or the trunk opening button does not work, the problem most likely lies in the key battery low.

Required tools and materials:

- New lithium battery CR2032 3v (from higher to lower price):
- Duracell CR2032
- VARTA CR2032
- Energizer CR2032
- Maxell CR2032
- Kodak CR2032
- GP CR2032
- Samsung CR2032
- Sony CR2032
- Supra CR 2032
- Flat blade screwdriver
Key Battery Replacement Guide:
Step 1. Remove the rear key cover by prying the Ford emblem off the edge.
Step 2. Pull out the inserted battery and change with a new one and that’s it.
Step 3. Click cover of the key and it’s ready for use.