Opening the Infiniti Key Fob

Most Infiniti key fobs open by sliding a small metal button or lever on the side of the fob, usually near the bottom. Look for a seam running along the edge—that's where the two halves separate. Push the button or lever firmly and the fob should pop open into two pieces.

If your fob has no visible button, try inserting a flathead screwdriver or coin into the seam and gently twisting. Do not force it; if it resists, you may be pushing in the wrong spot. The seam is typically on the long edge, not the short end.

Once open, you'll see the battery sitting in a small metal holder. Note which side faces up—the positive side (marked with a + symbol) should face toward you when you look at the open fob.

Key Takeaways

  • Infiniti key fobs use either CR2032 or CR2025 batteries depending on the model year, so check your current battery before buying a replacement.
  • The fob opens by sliding a button on the side or by gently prying the seam with a flathead screwdriver—forcing it can crack the plastic.
  • The positive side of the new battery must face upward when you place it in the holder, matching the orientation of the old battery.
  • After closing the fob, test all buttons (lock, unlock, panic) before putting the fob away to confirm the battery is making contact.

Removing the Old Battery

Once the fob is open, gently lift the old battery out of its metal holder. If it's stuck, use a plastic spoon or the edge of a credit card to pry it up—avoid metal tools that could scratch the circuit board inside.

Before you throw the old battery away, check the top or bottom for the battery type. You'll see a code like CR2032 or CR2025. Write this down or take a photo so you buy the exact same type.

Installing the New Battery

Place the new battery into the metal holder with the positive side (+ symbol) facing up, matching the way the old one sat. Press down gently until you hear or feel a small click—the battery should sit flat and snug in the holder.

Do not force the battery down. If it doesn't sit flush, remove it and check that you have the right battery type and that the holder itself isn't bent or damaged.

Closing the Fob and Testing

Align the two halves of the fob and press them together firmly until they click. You should feel a solid snap, not a loose fit. If the fob feels loose or the seam doesn't line up evenly, open it again and make sure the battery is seated properly.

Test every button on the fob—lock, unlock, and panic (if your model has one). Stand near your car and press each button to confirm the fob responds. If a button doesn't work, open the fob again and reseat the battery, making sure the positive side is still facing up.

Which Battery Type Your Infiniti Uses

Most Infiniti models from 2010 onward use a CR2032 battery, which is the most common coin-cell battery sold in drugstores and supermarkets. Some older models use a CR2025, which is slightly thinner but the same diameter.

The easiest way to know for certain is to check the old battery itself—the type is printed on the surface. If you've already thrown it away, you can also check your owner's manual or call an Infiniti dealer with your vehicle's year and model.

Replacement batteries cost between $3 and $8 at most retailers. Buy a name-brand battery (Duracell, Energizer, or Panasonic) rather than a generic one—they last longer and are more reliable in key fobs.

When to Call a Dealer Instead

If the fob still doesn't work after you've replaced the battery and tested all the buttons, the problem is likely inside the fob itself—a broken circuit board, corroded contacts, or a damaged button. In that case, a dealer can reprogram a new fob to your car or repair the existing one.

If your fob won't open no matter how you try, do not pry harder. A cracked case can let moisture inside and damage the electronics. A dealer can open it safely or replace the fob outright.

Frequently Asked Questions

Can I use a different battery type if I can't find the right one?

No. CR2032 and CR2025 look similar but have different thicknesses, and using the wrong one can prevent the battery from making proper contact. The fob won't work reliably, and you risk damaging the holder. Stick with the exact type printed on your old battery.

How long does an Infiniti key fob battery last?

Most coin-cell batteries last two to four years in a key fob, depending on how often you use it. If you use the fob multiple times daily, expect the shorter end of that range. Some people go longer without heavy use.

What if the fob still doesn't work after I replace the battery?

First, open the fob again and make sure the battery is sitting flat in the holder with the positive side up. If it is, the problem is likely a broken button or corroded circuit board inside. Contact an Infiniti dealer about repair or replacement options.

Do I need to reprogram the fob after changing the battery?

No. Changing the battery does not erase the fob's programming. Once the new battery is in and making contact, the fob should work when ready without any reprogramming steps.

Is it safe to handle the battery with my bare hands?

Yes. Coin-cell batteries are safe to touch with bare hands. Avoid touching the flat surfaces directly if possible—skin oils can reduce contact quality—but it won't cause harm. Wash your hands after handling if you prefer.