How To Change Battery In Infiniti Key Fob: A Simple Guide
Last Updated on October 12, 2026
You replace a dead cell by sliding the mechanical key out, prying the housing open with a small flat-head screwdriver, and swapping the old CR2032 coin battery for a new one. How to change battery in Infiniti Key Fob is a five-minute task that requires only a small tool and a fresh lithium coin cell. This method works for most standard proximity keys used by the brand over the last decade.
Items needed to change the battery
- One CR2032 3V lithium coin battery: Ensure you buy a high-quality brand, as cheap cells often fail within months.
- Small flat-head screwdriver: Use a jeweler’s size tool to avoid scratching the plastic casing.
- Microfiber cloth: Place this on your workspace to protect the key fob finish while you work.
- Clean workspace: A well-lit table prevents you from losing the rubber gasket.
If you’re unsure which battery your specific model uses, check the markings on the back of the old battery before you discard it.
How To Change Battery In Infiniti Key Fob: Step-by-Step
- Locate the release button on the back of the key fob and slide it to pull out the mechanical metal key.
- Insert the tip of your flat-head screwdriver into the slot where the metal key was just removed.
- Twist the screwdriver gently to pop the two halves of the plastic key fob casing apart.
- Remove the internal circuit board carefully to expose the battery compartment on the underside.
- Slide the old CR2032 battery out of its clip and insert the new one with the positive (+) side facing up.
- Align the circuit board back into the housing and press the two plastic halves together until they click into place.
- Slide the mechanical key back into the slot to secure the assembly.
Tip: If the casing feels stuck, don’t force it; ensure you’re prying from the seam near the key slot. Careful: Avoid touching the flat surfaces of the new battery with your bare fingers, as oils can cause corrosion. According to the Infiniti Owner Support guides, using the wrong battery type or installing it backward will prevent the remote from unlocking your vehicle.
Battery performance variations
The lifespan of a key fob battery changes depending on how often you use the proximity features.
| Situation | Average Lifespan | Impact | Watch for |
|---|---|---|---|
| Daily use | 12–18 months | Faster drain | Weak signal |
| Occasional use | 24+ months | Stable voltage | Delayed response |
| Extreme cold | 6–10 months | Chemical slowing | Total failure |
It’s safer to replace the battery as soon as you notice a reduced range than to wait until the fob stops working entirely.
Confirming a successful change
A successful result means your car responds instantly to the lock and unlock buttons from at least 20 feet away. If the buttons don’t work, the battery might be seated incorrectly or the metal contact pins might be slightly bent. This often happens if the battery is forced into the clip at an angle, which prevents a clean electrical connection. Prevent this by ensuring the battery sits perfectly flat in the cradle before closing the casing. If it still fails, the internal micro-switches may be worn out and need professional inspection.
Standards and maintenance
The CR2032 battery is a standard lithium cell used in many automotive remotes. Once you have finished, dispose of the old battery at a local recycling center rather than in your household trash, as these cells can cause fires in waste facilities. If you find that the key fob still doesn’t communicate with your car, you may need a dealer to perform a re-syncing procedure. This varies by model — check the label inside your owner’s manual for specific instructions on pairing your key to the vehicle’s security system.
Alternative replacement routes
Dealer assistance
Visit your local service center if you’re uncomfortable opening the plastic housing. They can perform the swap in minutes for a service fee, ensuring that no delicate internal clips are broken during the process.
Mobile locksmith
A professional locksmith can often come to your location to replace the battery and test the signal strength. This is a good option if you suspect the issue is with the key fob hardware itself.
DIY diagnostic tools
You can buy a radio frequency tester to check if your key is sending a signal. If the battery is new but the tester shows no signal, the key fob transmitter is likely faulty.
Frequently asked questions
Can I use a different battery size?
No, you must use the exact CR2032 size specified for your device. Using a different size, even if it fits, may lead to poor contact, voltage drops, or damage to the internal circuit board of your key fob.
Is it safe to open the key fob myself?
Yes, it’s safe as long as you use a small screwdriver and don’t apply excessive force. You aren’t dealing with high-voltage components, but avoid prying near the internal chip to prevent accidental damage to the electronics.
How long does a new battery last?
A new battery typically lasts between 12 and 18 months with standard daily use. This varies by model — check the label on your specific fob, as some newer proximity keys consume power faster than older, basic remote entry units.
What happens if I drop the key fob?
Dropping the fob can dislodge the battery or break the internal plastic clips. If your remote fails after a drop, open the casing to ensure the battery is still seated firmly and the circuit board is properly aligned.
How do I know if the battery is dying?
You’ll notice the key fob range decreasing significantly, often requiring you to stand right next to the door. Another sign is needing to press the buttons multiple times before the car reacts to the signal.
Can I replace the battery without tools?
No, you need a small flat-head screwdriver to pry the casing apart without damaging the plastic edges. Using a butter knife or other improvised tools often results in scratched housing or broken plastic tabs that hold the unit together.
Battery Infiniti, in short
If your key fob still fails to unlock the doors after you have installed a fresh battery, the internal transmitter might be damaged. In this case, you should consult an authorized dealer to verify if the key fob needs a full replacement or a simple reprogramming to restore its connection to the vehicle’s security system.
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