In most 2019-era car key fobs, the power comes from a 3-volt lithium coin cell—predominantly the CR2032. Some models, however, use an alternate coin cell such as CR2025 or, in a few compact remotes, smaller sizes like CR1632 or CR1616. Always verify for your specific vehicle by checking the owner's manual or the existing battery inside the fob.
Common battery types used in 2019 key fobs
Coin-cell batteries vary by design, but the sizes most likely to appear in 2019 remotes are listed below. Use the exact size recommended for your model to ensure proper fit and function.
- CR2032 — 3V lithium coin cell. By far the most common size for 2019 fobs and compatible with most remote designs.
- CR2025 — 3V lithium coin cell. A thinner alternative used in some models where space is tight.
- CR1632 or CR1616 — 3V lithium coin cells. Smaller sizes occasionally found in very compact remotes; check the fob’s cavity for the exact fit.
When replacing, choose the exact size required for your fob. Using the wrong size or incorrect orientation can prevent the key from functioning or sealing properly.
How to identify and replace the battery
To ensure you buy the correct battery and replace it safely, follow these steps.
- Locate and read the battery code on the current battery, if legible. If not, open the fob carefully to reveal the battery size.
- Consult the vehicle’s owner’s manual or the manufacturer’s support site for your model and year to confirm the recommended battery size.
- Purchase a fresh CR2032 (or the specified size) from a reputable brand and in good condition.
- Gently pry apart the fob to expose the battery compartment, noting the orientation of the old battery.
- Insert the new battery with the correct polarity, ensuring it sits flat and secure in the cavity.
- Reassemble the fob, then test all functions from a short distance. If the remote still doesn’t work, recheck size/orientation or consider reprogramming.
Once finished, dispose of the old battery at an appropriate recycling or hazardous-waste facility to minimize environmental impact.
Summary
For 2019-model key fobs, the prevailing answer is a 3-volt lithium coin cell, most commonly CR2032. Some vehicles use CR2025 or even smaller coin cells, so verification is essential. When in doubt, reference the owner’s manual or contact the dealer to ensure you replace with the correct size and orientation.