Quick Summary
Infiniti key fob replacement batteries are simple to find and install. This guide shows you the exact battery type (CR2032) and outlines easy, step-by-step instructions to replace your dead key fob battery, ensuring you regain quick access to your car.
Your Infiniti key fob is a lifeline, letting you unlock doors, start your car remotely, and activate the alarm with just a push of a button. But like any part of your car, the battery inside won’t last forever. When your key fob starts acting sluggish or stops working altogether, it can be a real headache. You might be left fumbling with your physical key, which isn’t ideal especially when you’re in a hurry or it’s raining. The good news is, replacing the battery is a straightforward DIY job. You don’t need to be a car expert or a tech whiz to get it done.
This guide will walk you through everything you need to know. We’ll cover identifying the correct battery, gathering the few tools you’ll need, and following simple steps to swap out the old battery for a new one. By the end, you’ll feel confident and ready to tackle this common car maintenance task yourself, saving time and money.
Why Your Infiniti Key Fob Battery Dies
Think of your key fob as a tiny remote control for your car. It uses a small battery to send signals to your vehicle. Every time you press a button – to lock, unlock, or start your engine – the fob uses a bit of power. Over time, this constant use drains the battery. Several factors can speed up this process, including how often you use the fob, the age of the fob itself, and even extreme temperatures.
- Frequent Button Presses: The more you use your key fob, the faster the battery drains.
- Battery Age: Like all batteries, the one in your key fob has a limited lifespan.
- Extreme Temperatures: Very hot or very cold conditions can affect battery performance and longevity.
- Interference: Sometimes, other electronic devices can cause your fob to work harder to send its signal.
Identifying the Right Replacement Battery
The most common battery used in Infiniti key fobs is the CR2032. This is a standard 3-volt lithium coin cell battery, widely available at most supermarkets, drugstores, electronics stores, and online. It’s a popular choice for many small electronic devices because it’s compact and provides a decent amount of power for its size.
Before you buy, it’s always a good idea to double-check your car’s owner’s manual or, if possible, look at the old battery once you remove it. You’ll usually find the battery type printed on its surface. For most Infiniti models from the last decade or so, the CR2032 is the standard. If you have an older model, it’s still often a CR2032, but checking is the safest bet to avoid a trip back to the store.
Common Infiniti Key Fob Battery Type:
| Model Year Range (Typical) | Battery Type | Voltage |
|---|---|---|
| 2005 – Present | CR2032 | 3V |
If you’re unsure, a quick search online for your specific Infiniti model and year along with “key fob battery type” will usually confirm what you need. Reputable automotive sites and battery manufacturers also offer online tools to help you find the correct battery for your vehicle.
Tools You’ll Need
You don’t need a specialized toolkit for this job. In fact, you can probably find everything you need around your house. The key is to be gentle to avoid damaging the plastic casing of your key fob.
- The New Battery: As identified, likely a CR2032.
- Small Flathead Screwdriver or Plastic Pry Tool: This is essential for gently prying open the key fob case. A plastic pry tool is ideal because it’s less likely to scratch or damage the plastic. If you only have a screwdriver, be very careful.
- A Soft Cloth: To protect the key fob from scratches while you work and to clean any residue from the old battery.
- Optional: A Small Pliers: Sometimes, the old battery can be a bit stuck, and small pliers can help gently wiggle it out.
Having these simple items ready will make the battery replacement process smooth and hassle-free.
Step-by-Step Guide to Replacing Your Infiniti Key Fob Battery
Replacing the battery in your Infiniti key fob is a process designed for ease. Let’s break it down into simple, manageable steps. Remember to work on a flat surface where you can easily see what you’re doing, and take your time.
Step 1: Locate the Seam on Your Key Fob
Hold your key fob in your hand. You’ll notice a small seam running around the edge of the fob where the two halves of the casing meet. On many Infiniti fobs, there might be a small notch or indentation, often near where the physical key blade attaches, that is specifically designed for prying. This is your starting point.
Examine the fob closely under good light. Sometimes it’s obvious, other times you need to look for a very thin line that separates the casing. If there’s a specific slot intended for opening, use that one. It’s usually the path of least resistance and reduces the chance of damage.
Step 2: Gently Pry Open the Key Fob
Take your small flathead screwdriver or plastic pry tool. Insert the tip of your tool into the seam or the designated notch you found in Step 1. Apply gentle, steady pressure to twist the tool slightly. You’re aiming to create a small gap between the two halves of the fob’s casing. Work your way slowly around the seam with the tool if needed, applying gentle leverage.
The case is usually held together by small plastic clips. You’re trying to unhook these clips without breaking them. Avoid forcing the tool too hard, as this can snap the plastic. If you hear a faint click, it means a clip has popped open. Continue this process until the two halves of the fob begin to separate.
Step 3: Remove the Old Battery
Once the key fob is open, you’ll see the small, round battery nestled inside. It’s usually silver and may have some markings on it. The battery is typically held in place by a small clip or simply by the snug fit of the casing. If it’s loose, you can often lift it out with your fingertip or a plastic tool.
If the battery feels stuck, use your plastic pry tool or even a fingernail to gently nudge it out from underneath. Be careful not to scratch the internal components or the battery compartment contacts. If you’re using pliers, grip the edge of the battery very lightly and gently pull it upwards.
Step 4: Insert the New Battery
Take your new CR2032 battery. Notice that one side is usually marked with a plus (+) sign and is slightly larger or has raised lettering. The other side is flat and marked with a minus (-). Look inside your key fob and identify which way the battery should be oriented. Usually, the positive (+) side faces upwards, towards the circuit board and buttons, but it’s good to visually confirm this by looking at how the old battery was placed.
Carefully place the new battery into the compartment, ensuring it’s correctly oriented. Press it down firmly until it sits snugly in place. Sometimes there’s a small click as it settles in. You might need to ensure the contacts on the fob are clean before inserting the new battery; a quick wipe with your cloth can do wonders.
Step 5: Reassemble the Key Fob
Align the two halves of the key fob casing. Gently press them together. You should feel the plastic clips snapping back into place. Work your way around the edge, applying even pressure until the two halves are fused back together securely. Make sure there are no gaps, and the seam is closed all the way around.
If you had to remove a physical key blade, reinsert it now. Your key fob should look and feel just like it did before you started. A quick test will confirm it’s working.
Step 6: Test Your Key Fob
Now for the moment of truth! Go to your Infiniti and try operating the buttons. Press the lock button, then the unlock button. Try the panic alarm if you wish. If the lights flash and you hear the audible clicks indicating the doors are locking and unlocking, congratulations! You’ve successfully replaced your key fob battery.
If it doesn’t work immediately, don’t panic. Double-check that the battery is inserted correctly and that the casing is fully closed. Sometimes, a slightly misaligned casing can prevent a button from making proper contact. You might also try taking the battery out and reinserting it, just to ensure it’s seated properly.
Troubleshooting Common Key Fob Issues
Even with a new battery, you might encounter a hiccup. Here are a few common issues and how to resolve them
- Fob Still Doesn’t Work:
- Battery Orientation: Double-check the positive (+) and negative (-) sides are correct.
- Battery Contact: Ensure the battery is making good contact with the terminals inside the fob. You can gently bend the metal contacts slightly to create better pressure if needed.
- Corrosion: Check the battery terminals for any signs of corrosion. Clean them with a pencil eraser or a cotton swab dipped in rubbing alcohol.
- Key Fob Range is Weak:
- Battery Quality: Ensure you’re using a reputable brand of battery. Cheap, unbranded batteries may not hold a charge as well.
- Internal Damage: If the fob has been dropped or exposed to water, internal electronic components might be damaged, which a battery replacement won’t fix.
- Car Doesn’t Recognize Fob After Replacement:
- Some Infiniti models may require the key fob to be reprogrammed if the battery has been dead for a long time or if it’s a completely new fob. Consult your owner’s manual or a dealership for reprogramming instructions if simple battery replacement doesn’t solve the issue.
When to Consider Professional Help
While replacing a key fob battery is usually a simple DIY task, there are times when it’s best to let a professional handle it. If you’ve tried replacing the battery yourself and the fob still isn’t working, the issue might be more complex.
- Damaged Fob Casing: If the plastic casing of your key fob is cracked or broken, it’s difficult to keep the internal components secure and protected.
- Water Damage: If your key fob has been submerged in water or exposed to significant moisture, the internal electronics could be corroded or damaged beyond simple repair.
- Lost All Fobs: If you’ve lost all your key fobs, you’ll need a dealership or a qualified automotive locksmith to cut and program new ones. Visit AutoMD’s Key Fob Replacement Guide for more information on professional services.
- Complex Internal Issues: Sometimes, the buttons themselves might be worn out, or there could be a problem with the fob’s internal circuitry that requires professional diagnosis.
In these situations, contacting your Infiniti dealership or a reputable automotive locksmith is the best course of action. They have the specialized tools and knowledge to diagnose and fix issues with keyless entry systems.
Infiniti Key Fob Battery FAQs
Q1: What is the most common battery type for an Infiniti key fob?
A: The most common battery type for Infiniti key fobs is the CR2032, a 3-volt lithium coin cell battery. It’s widely available and easy to find.
Q2: How often should I expect to replace my Infiniti key fob battery?
A: Typically, a key fob battery lasts between 1 to 3 years. This can vary depending on how often you use the fob and environmental factors like temperature.
Q3: Can I use a rechargeable battery in my key fob?
A: No, Infiniti key fobs are designed for non-rechargeable lithium coin cell batteries like the CR2032. Using a rechargeable battery could damage the fob’s electronics due to voltage differences or leakage.
Q4: My key fob stopped working after I replaced the battery. What should I do?
A: First, double-check that the new battery is inserted correctly with the positive (+) side facing the correct way. Ensure the casing is snapped shut securely. If it still doesn’t work, the battery might be faulty, or there could be an issue with the fob itself. Try a different brand-new battery. If problems persist, contact a professional.
Q5: How do I know if my key fob battery is low?
A: A weakening key fob battery might cause buttons to require multiple presses to work, a shorter range of operation, or it might fail to send signals to your car altogether. Sometimes, your car’s dashboard might even provide a warning message.
Q6: Can I replace the battery myself?
A: Yes, replacing an Infiniti key fob battery is a simple DIY task that most owners can do at home with basic tools like a small screwdriver or pry tool. Our step-by-step guide makes it easy.
Proper Disposal of Old Batteries
It’s important to dispose of old batteries responsibly. Lithium coin cell batteries, like the CR2032, can be harmful to the environment if not handled properly. They contain chemicals that can leach into the soil and water if they end up in landfills.
- Check Local Recycling Centers: Many municipalities have designated drop-off points for household batteries.
- Retailer Take-Back Programs: Some electronics stores or battery retailers offer battery recycling programs.
- Household Hazardous Waste Facilities: Your local hazardous waste facility is equipped to handle battery disposal.
Never throw used batteries directly into your regular trash bin. You can often find useful information about battery recycling in your area by visiting websites like the Environmental Protection Agency’s guidance on hazardous waste or checking your local government’s waste management website.
Conclusion
Taking care of your Infiniti key fob, starting with a simple battery replacement, is a small act of maintenance that pays off in convenience. You’ve learned that the CR2032 battery is likely your go-to, that you only need a few common tools, and that the process is remarkably straightforward. By following these steps, you can avoid the frustration of a dead key fob and keep your Infiniti accessible with ease.
Remember, if you encounter any issues that a battery swap doesn’t fix, don’t hesitate to consult your owner’s manual or seek professional help. But for most common problems, you’ve now got the knowledge and confidence to handle it yourself. Enjoy the peace of mind that comes with a fully functional key fob, ready to unlock your world whenever you need it.
