How To Change An Infiniti Key Fob Battery: A Quick Guide
Last Updated on October 12, 2026
To perform a successful How To Change An Infiniti Key Fob Battery, you simply slide the release switch, remove the mechanical key, and pry the case apart to replace the CR2032 lithium coin battery. This process usually takes five minutes and requires only a small flat-head screwdriver.
Items needed to change your battery
Gather these items before starting to ensure the process goes smoothly:
- One fresh CR2032 3V lithium coin battery (check your owner’s manual if you have an older model, as some use different sizes).
- A small, thin flat-head screwdriver.
- A soft microfiber cloth to wipe the internal contacts.
- A clean, well-lit workspace to avoid losing tiny screws or clips.
If you’re unsure of the correct battery size for your specific vehicle year, you can check the Infiniti owner’s manual for the exact specification. Don’t use a damaged battery, as it can leak or fail.
How To Change An Infiniti Key Fob Battery: Step-by-Step
- Press the release button on the back of the key fob and pull out the metal mechanical key.
- Insert the tip of your flat-head screwdriver into the slot where the mechanical key was housed.
- Gently twist the screwdriver to pop the two halves of the plastic key fob casing apart.
- Remove the old battery by lifting it out with your fingers or the edge of the screwdriver.
- Insert the new battery with the positive (+) side facing up, away from the circuit board.
- Snap the two halves of the key fob back together until you hear a distinct click.
- Reinsert the mechanical key into the fob until it locks into place.
Careful: Don’t force the casing open, as the plastic tabs can snap easily. If you can’t get the case to open, ensure you’re using the correct slot near the key entry point.
Tip: If the fob doesn’t work after replacement, check that the battery is seated firmly against the metal contact pins.
Variables in Replacement
The difficulty and time required for this task depend on your specific fob generation.
| Fob Type | Time Estimate | Complexity | Watch For |
|---|---|---|---|
| Smart Key (Push-to-start) | 3-5 minutes | Low | Alignment of plastic clips |
| Integrated Key (Flip-style) | 5-8 minutes | Moderate | Tiny internal screws |
| Basic Remote | 2-4 minutes | Low | Correct polarity orientation |
It’s always safer to start with light pressure when prying the case; you can always apply more force if needed, but you can’t undo a cracked plastic housing.
Verifying the Result
A successful replacement results in the small indicator light on the fob blinking when you press a button. If the light doesn’t flash, the battery may be upside down or the contacts might be dirty. Use your microfiber cloth to gently clean the metal prongs if you see any dust or residue. A common mistake is touching the flat surfaces of the new battery with bare, oily fingers, which can reduce conductivity; try to handle the battery by its edges or use a clean cloth.
Maintenance and Best Practices
Once you have finished the replacement, dispose of your old battery at a designated recycling center rather than in the household trash. Most fobs will function for a period before requiring another battery change. If your key fob is submerged in water, take it to a professional technician immediately to prevent permanent circuit board corrosion.
Alternative Approaches
Visit an Infiniti Dealer
You can bring your fob to an authorized dealer service department. They will provide the correct battery and perform the swap for you, though this usually incurs a labor fee beyond the cost of the part.
Use a Local Locksmith
Automotive locksmiths often stock specific fob batteries and can perform the replacement on the spot. This is a faster alternative if you’re worried about damaging the delicate plastic tabs during the DIY process.
Professional Key Repair
If the internal circuit board is damaged or unresponsive, a professional shop can test the signal strength. They can often repair broken contact points or replace the entire transmitter housing if the original is worn out.
Frequently asked questions
Can I use a different battery size?
No, you must use the exact battery size specified by the manufacturer. Using the wrong size can damage the internal contacts or prevent the key fob from transmitting the signal required to start your vehicle.
Is it safe to change the battery myself?
Yes, it’s safe to perform this task yourself as long as you don’t force the plastic casing. If the fob appears damaged or the circuit board is loose, take it to a professional to avoid further harm.
What happens if I put the battery in backward?
Nothing will happen because the fob won’t receive power. If your fob is unresponsive after you finish, remove the casing and flip the battery so the positive side faces the correct direction as noted in your manual.
How long does a key fob battery usually last?
A standard CR2032 battery typically lasts for a period with normal daily use. Factors like extreme cold or frequently pressing buttons while out of range can shorten this lifespan significantly.
Why is my key fob still not working?
If the light doesn’t blink after a fresh battery install, the internal circuit board may be faulty. Contact an authorized dealer to test the signal, as this indicates a hardware failure rather than a power issue.
Can I use a screwdriver to pry it open?
Yes, but use the smallest flat-head screwdriver you have to prevent marring the plastic. Take your time and gently twist rather than prying hard, which helps keep the delicate locking tabs intact for future use.
Infiniti Key, in short
Once you’ve snapped the cover back into place, test the buttons near your vehicle to ensure everything’s working perfectly. If the lights don’t blink or the doors don’t lock, double-check that the battery is seated firmly. You’ll be back on the road in no time with a reliable, ready-to-go remote.
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