Typically a 3-volt lithium coin-cell such as CR2032 is used, but there are exceptions. Some 2019-era fobs use smaller CR2025 or CR1632 cells depending on the make and model. Check your owner's manual or inspect the fob itself to confirm the exact type.
Common sizes you may encounter
Many 2019 fobs rely on one of a few standard coin-cell sizes. The following sizes are the most likely to appear when you open a fob:
- CR2032 — the most widely used 3-volt coin cell in modern fobs.
- CR2025 — a thinner alternative used in some compact or slimmer fob designs.
- CR1632 — used in a few smaller, more compact fobs.
Note: The exact size for your vehicle is specified in your owner's manual or printed on the battery inside the fob. If you’re unsure, contact the dealer or a professional to confirm before purchasing.
How to determine your exact battery and replace it
Follow these steps to identify the correct battery and replace it safely. The list that follows walks you through inspection, purchasing, and replacement.
- Open the fob carefully to access the battery compartment. Most fobs have a seam along the edge and can be pried apart gently with a small flat tool.
- Remove the old battery and note its size and polarity. Look for any markings on the battery or measure the coin’s diameter and thickness if needed.
- Match the size with a new battery: CR2032 is common, but CR2025 or CR1632 may be used in smaller fobs. Ensure you pick the same size.
- Insert the new battery with the correct orientation. The plus (+) side should face up as indicated on the fob or by the old battery. Do not force it if it doesn’t fit easily.
- Reassemble the fob and test the buttons to confirm the fob works from a short distance away.
- Dispose of the old battery properly at a recycling point.
By following these steps, you’ll typically restore the fob’s range and reliability. If the fob still doesn’t work after replacement, the issue may lie with the remote’s electronics or the car’s receiver rather than the battery.
Brand notes (how to confirm for your vehicle)
Toyota and Lexus
Many Toyota and Lexus fobs use CR2032 or CR2025 depending on the model and year. If in doubt, check the owner’s manual or the battery itself for markings.
Honda and Acura
Most Honda and Acura fobs use CR2032, but variations exist. Always verify via manual or by inspecting the battery inside the fob.
Ford, GM, Hyundai, and Kia
These brands commonly use CR2032 or CR2025 in their 2019-era fobs. If you’re unsure, rely on the battery markings in the fob or the manual.
Summary
In 2019, the majority of key fobs used a 3-volt coin cell, with CR2032 being the most common. Other sizes like CR2025 and CR1632 appear in some designs. Always verify the exact battery type for your particular vehicle by checking the owner’s manual, the battery’s markings, or the manufacturer’s guidance, and follow proper replacement and disposal procedures.