Have you ever pressed the unlock button on your Nissan key fob only to be met with silence? It’s a common and often frustrating experience for Nissan owners. A dead key fob battery can disrupt your daily routine, leaving you wondering how to access your vehicle and get back on the road. One of the first questions that comes to mind when faced with this issue is: “What size battery does my Nissan key fob actually take?”
Knowing the correct battery size is the first step towards a quick and easy fix. Fortunately, replacing your Nissan key fob battery is usually a straightforward process you can handle yourself. This guide will walk you through everything you need to know about Nissan key fob batteries, including identifying the correct size, accessing your car with a dead battery, and step-by-step instructions on how to replace it.
Understanding Nissan Key Fob Batteries: Common Sizes
Nissan key fobs, also known as Nissan Intelligent Keys, are powered by small, coin-shaped batteries. The most common types you’ll find in Nissan key fobs are CR2025 and CR2032 batteries. Both are 3V lithium batteries, but they differ slightly in thickness.
- CR2025: This battery is thinner than the CR2032 and is a common choice for compact electronic devices like key fobs.
- CR2032: Slightly thicker than the CR2025, the CR2032 offers a bit more capacity and potentially longer life.
While these are the most frequently used, it’s important to confirm the exact battery size required for your specific Nissan model and year, as variations can occur.
Identifying the Correct Battery Size for Your Nissan Key Fob
To ensure you purchase the right replacement, here are the most reliable ways to determine what size battery your Nissan key fob needs:
1. Check Your Nissan Owner’s Manual
Your owner’s manual is your best resource for accurate information about your vehicle, including key fob battery specifications. Locate the section on key fobs or electronic keys in your manual. It should specify the exact battery type required for your key fob. This is the most definitive method and eliminates any guesswork.
2. Open Your Key Fob and Inspect the Old Battery
If you don’t have your owner’s manual readily available, or prefer a hands-on approach, you can open your Nissan key fob to check the battery directly. Here’s how:
- Locate the Emergency Key Release: On the back of your key fob, you will find a small latch or release button.
- Release and Remove the Emergency Key: Press the release and slide out the mechanical emergency key.
- Carefully Open the Key Fob: Look for a small notch along the seam of the key fob casing, where the emergency key was located or on the sides. Insert a small flathead screwdriver or a similar thin, flat tool into this notch. Gently twist or pry to separate the two halves of the key fob. Be careful not to apply excessive force to avoid damaging the casing.
- Identify the Battery Type: Once open, the battery will be visible. The battery type (e.g., CR2025, CR2032) is typically printed directly on the battery itself. Note this information down.
3. Consult Online Resources (With Caution)
While less reliable than the owner’s manual or direct inspection, some online resources or parts websites may offer battery size information based on your Nissan model and year. However, always cross-reference this information with another source if possible, as online databases can sometimes be inaccurate.
Replacing Your Nissan Key Fob Battery: A Simple DIY Guide
Once you have the correct replacement battery (CR2025 or CR2032, as determined above), the battery replacement process is quite simple and can be done in a few minutes.
- Prepare Your Key Fob: Flip your key fob over and press the release button to remove the emergency key, if you haven’t already.
- Open the Key Fob Casing: As described in the battery identification section, carefully pry open the key fob halves using a small flathead screwdriver or similar tool at the designated notch.
- Remove the Old Battery: Gently remove the dead battery from the key fob. Take note of the battery’s orientation (+/- sides) before removing it.
- Insert the New Battery: Place the new battery into the battery compartment, ensuring it’s in the correct orientation (usually positive side up).
- Reassemble the Key Fob: Carefully align the two halves of the key fob casing and press them firmly together until they snap or click securely back into place.
- Replace the Emergency Key: Slide the emergency key back into its slot until it clicks and is securely held.
- Test Your Key Fob: Press the buttons on your key fob to ensure it’s now working correctly, locking and unlocking your Nissan.
Dealing with a Dead Key Fob Battery: Access and Starting Your Nissan (Temporarily)
Even with a dead key fob battery, you are not stranded. Nissan Intelligent Keys are designed with a backup plan to get you into your vehicle and start the engine:
- Access Your Vehicle with the Emergency Key: Use the mechanical emergency key you removed from the key fob to manually unlock your Nissan door.
- Starting Your Nissan:
- Key Fob Port: Some Nissan models have a designated key fob port, often located on the steering column or dashboard. Insert the key fob into this port, then press the brake pedal or clutch and press the START/STOP button.
- Direct Key Fob to START/STOP Button: If there’s no key fob port, step on the brake pedal or clutch and press the key fob directly against the START/STOP ignition button.
These methods should allow you to start your Nissan and drive to your destination, giving you time to purchase and replace the key fob battery.
When to Seek Professional Help: Reprogramming and Complex Issues
While battery replacement is usually DIY-friendly, there are situations where professional assistance is recommended:
- Key Fob Reprogramming: If you replace the key fob itself, or if battery replacement doesn’t restore functionality, the key fob may need to be reprogrammed to your vehicle. Nissan recommends visiting a dealership for reprogramming, as it’s a complex procedure requiring specialized equipment.
- Persistent Key Fob Issues: If you’ve replaced the battery and your key fob still isn’t working correctly, there might be a more significant issue with the key fob itself or your vehicle’s receiver. In such cases, it’s best to consult with a Nissan dealership or qualified automotive technician.
Frequently Asked Questions About Nissan Key Fob Batteries
Q1: What Size Battery Does A Nissan Key Fob Take?
A: Most Nissan key fobs use either a CR2025 or CR2032 3V lithium battery. The specific size can vary depending on your Nissan model and year. Always check your owner’s manual or open your key fob to identify the exact battery type needed.
Q2: Can I replace the Nissan key fob battery myself?
A: Yes, in most cases, replacing a Nissan key fob battery is a simple DIY task. Follow the step-by-step guide provided in this article.
Q3: What happens if my Nissan key fob battery dies completely?
A: You can still access your Nissan using the mechanical emergency key hidden inside the key fob. You can also start your vehicle by using the key fob in the key fob port (if equipped) or by pressing it directly against the START/STOP button.
Q4: Where can I purchase a replacement Nissan key fob battery?
A: You can find CR2025 and CR2032 batteries at most drug stores, hardware stores, department stores, auto parts stores, and online retailers.
Q5: How often should I replace my Nissan key fob battery?
A: Key fob battery life varies, but they typically last for 2-3 years. Battery life can be affected by usage frequency and environmental factors. If you notice your key fob range decreasing or becoming less responsive, it’s likely time for a battery replacement.
Replacing your Nissan key fob battery is a routine maintenance task that can save you time and hassle. By knowing the correct battery size and following these simple steps, you can keep your Nissan key fob working reliably. If you encounter any issues or need further assistance, remember that your local Nissan dealership is always available to help.
