What size battery for Nissan key fob is a common question that arises when your remote keyless entry system starts to falter. A dead or dying battery can be incredibly frustrating, leaving you locked out of your vehicle or unable to start the engine. Fortunately, replacing this small but vital component is usually a straightforward process, and understanding the correct battery size is the first crucial step.
Nissan key fobs, like those from most car manufacturers, utilize small, round, button-cell batteries. These batteries are specifically designed for low-power, long-lasting applications, making them ideal for the constant, albeit minimal, energy demands of your key fob. The most common battery size found in Nissan key fobs is the CR2032. This is a 3-volt lithium coin cell battery, characterized by its diameter and thickness. The “20” in CR2032 refers to its diameter (20mm) and the “32” refers to its thickness (3.2mm). You’ll find this size in a wide range of Nissan models, from sedans like the Altima and Sentra to SUVs like the Rogue and Murano, and even trucks like the Frontier.
However, while the CR2032 is the most prevalent, it’s not the only size used. In some older models or specific trim levels, you might encounter other coin cell batteries. For instance, some Nissan key fobs, particularly those with integrated remote start features or a slightly different design, might use a CR2025 battery. This battery is very similar to the CR2032, being 3 volts, but it’s slightly thinner with a diameter of 20mm and a thickness of 2.5mm. Less commonly, you might find a CR1620 or even a CR1616 in certain Nissan key fobs. These are also lithium coin cells but are smaller in diameter and thickness.
Identifying the Correct Nissan Key Fob Battery Size
So, how do you definitively determine what size battery for Nissan key fob you need? The most reliable method is to physically examine your existing key fob. Most Nissan key fobs are designed to be opened for battery replacement. Typically, you’ll find a small seam along the edge of the fob. You can often pry this open gently using a small flathead screwdriver, a coin, or even your fingernail. Once opened, the battery will be visible. It will have its size designation printed directly on its surface. Look for the embossed numbers and letters – it will read something like “CR2032” or “CR2025.”
If you’re hesitant to open your key fob yourself or if you’ve misplaced the old battery, consulting your Nissan owner’s manual is another excellent resource. The manual will usually have a section dedicated to key fob maintenance and will specify the exact battery type required for your particular vehicle model and year. Alternatively, you can visit a Nissan dealership or a reputable auto parts store. Their staff can often look up the correct battery size based on your car’s make, model, and year. Many online retailers that sell batteries also have helpful lookup tools where you can input your vehicle information to find the compatible battery.
Why Choosing the Right Battery Size Matters
Using the correct battery size is paramount for several reasons. Firstly, the dimensions of the battery are crucial for it to fit properly within the key fob’s battery compartment and make consistent contact with the terminals. A battery that is too thick or too thin might not sit securely, leading to intermittent operation or complete failure of the key fob.
Secondly, while many coin cell batteries look similar, their slight variations in size can have significant performance implications. Using a battery that isn’t the correct specification might lead to its premature death, even if it initially seems to work. This could be due to a mismatch in physical contact or internal design that’s optimized for a specific size.
The Best Choice: CR2032 vs. Others
When considering what size battery for Nissan key fob is the “best choice,” the answer almost invariably points to the CR2032. This is due to its widespread adoption by Nissan. Its slightly larger diameter and thickness compared to some alternatives often translate to a longer lifespan and more robust performance. The CR2032 has a higher capacity for energy storage, meaning it can power your key fob for a longer duration before needing replacement. This translates to fewer replacements over the life of your vehicle, saving you both time and money.
Furthermore, the CR2032 is a very common battery size, readily available at most convenience stores, supermarkets, pharmacies, and online retailers. This accessibility ensures that if your key fob battery dies unexpectedly, you can likely find a replacement quickly.
While CR2025 and other sizes might be specified for certain models, the CR2032 remains the dominant and generally preferred choice for Nissan key fobs due to its balance of size, longevity, and availability.
Tips for Replacing Your Nissan Key Fob Battery
Once you’ve identified the correct battery size (most likely a CR2032), replacing it is usually a simple DIY task.
1. Open the Fob: As mentioned, find the seam and gently pry the fob open.
2. Note Battery Orientation: Pay attention to how the old battery is seated, particularly which side (positive or negative) is facing up or down.
3. Remove Old Battery: Carefully remove the old battery, often with a non-metallic tool like a plastic pry tool or toothpick to avoid damaging the contacts.
4. Insert New Battery: Insert the new battery, ensuring it’s in the correct orientation.
5. Close the Fob: Snap the two halves of the key fob back together securely.
6. Test: Test the key fob functionality immediately by unlocking and locking your car doors.
If, after replacing the battery, your key fob still doesn’t work, there might be a more significant issue with the fob itself or your vehicle’s receiver system. However, in the vast majority of cases, a fresh battery of the correct size is all that’s needed to bring your Nissan key fob back to full functionality. Knowing what size battery for Nissan key fob you need is the first step to keeping your car conveniently accessible.