Mercury Monterey key fob battery
3 of the 4 model years listed for the Mercury Monterey have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2004Remote (separate)
CR2032
FCC ID CWTWB1U331Owner's manual: manualowl.com and americankeysupply.com (checked Nov 1, 2026)
Manual text: “one coin type three-volt lithium battery CR2032 or equivalent”
Find CR2032 on Amazon - 2005-2006Remote (separate)
CR2032
FCC ID CWTWB1U331Two sites agree: manualowl.com and americankeysupply.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2007Remote (separate)
Not confirmed yet
Changing the battery
Separate remote fob
- This remote is its own fob, separate from the metal key, which makes it one of the easier ones to open.
- Find the slot along the edge and turn a coin in it. Go slowly so the clips do not snap.
- Swap the cell or cells, keeping the same side up as the old ones.
- Close the fob and test it. If it does not work, open it again and check the cell is seated flat.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.