Your key fob suddenly stops working just when you need it most. You tap it, shake it, even curse it a little, but nothing happens. That little device controls so much of your day, yet most of us ignore its battery until it dies. What if replacing it is simpler than you thought? Here’s a story of how I swapped mine without any stress and saved a trip to the dealer.
To change the battery in your 2018 Nissan Murano key fob, first, pry open the fob carefully using a small flat tool. Remove the old CR2032 battery, noting its orientation. Insert a new battery in the same direction, ensuring it sits flush. Snap the fob back together securely, test all buttons, and make sure the car responds. Finally, check the range and function once or twice before relying on it.
Accessing Your Nissan Murano Key Fob
The first thing to realize is the fob isn’t complicated once you look closely. Start by holding it firmly and finding the seam around the middle. You might notice a small notch designed for a coin or flat tool. Slide it gently, and the cover pops open without forcing anything.
Once open, take a moment to appreciate how tiny the battery is. You may wonder how such a small piece can power so many functions. Make sure your hands are dry to avoid slipping. A little care here prevents scratches or accidental damage.
Always keep a small tray nearby. This prevents the battery from bouncing away if it drops. Think of it like a tiny treasure hunt—you don’t want to lose that little disk. Place the cover aside safely; it’s easy to misplace.
You’ll see the old battery sitting in the middle. Take note of the positive and negative sides. Orientation matters, or the fob won’t work. It’s a small detail, but it makes the difference between success and frustration.
- Find the seam and notch on the fob
- Use a small flat tool to pry open
- Keep a tray for the tiny battery
- Note the battery orientation
Removing the Old Battery
Removing the old battery requires steady hands and patience. Use your fingernail or a plastic tool to lift it gently. Avoid metal tools if possible, as they may scratch or short-circuit. You’ll notice the battery is snug, which is normal.
Once lifted, observe its condition. Sometimes the battery may leak slightly, which signals replacement sooner than later. If it looks clean, still replace it; batteries have limited life, and unpredictable failure is frustrating. Always dispose of old batteries responsibly.
Keep a paper towel or small cloth handy. It prevents any accidental slips and protects the fob’s interior. Take your time and focus. A tiny mistake here can mean the difference between a smooth swap and a fob that refuses to respond.
Consider taking a quick photo before removing the battery. That way, you remember the exact orientation. Simple pictures often save a lot of trial and error. This trick helps when batteries look identical on both sides.
- Remove gently with a plastic tool
- Check battery condition for leaks
- Use a paper towel for grip
- Take a photo for orientation reference
Choosing the Right Replacement Battery
The 2018 Nissan Murano key fob uses a CR2032 battery. You’ll find it easily at any store or online. Make sure it’s fresh; check the expiration date. A dead battery from the shelf defeats the purpose.
Compare the old battery with the new one. Size and shape must match exactly. It’s surprising how tiny differences affect performance. Some cheap batteries may not last as long, so consider a trusted brand.
Keep spare batteries handy at home. That way, the next time it dies, you won’t scramble. I keep one in my glove box—it’s a small habit that prevents big headaches. Think of it like an insurance policy for convenience.
Insert the battery positive side up, as indicated by the markings. Small mistakes here prevent the fob from communicating with the car. Double-check before snapping the cover back on. Accuracy now saves frustration later.
- Use CR2032, check expiration
- Match size and brand carefully
- Keep a spare battery handy
- Insert positive side up
Reassembling the Key Fob
Snap the fob halves back together slowly. Make sure no part is misaligned, or buttons may stick. You should hear a gentle click. This reassures you it’s locked properly.
Press each button once before closing fully. Sometimes, buttons stick, and adjusting them now avoids future problems. Take a moment to make sure everything feels right. It’s a tiny step, but it saves trips later.
Don’t rush the cover; forcing it may crack the plastic. If it’s tight, wiggle gently. Even experienced owners can forget this, so patience pays off. Think of it like putting together a small puzzle.
Once closed, test the fob near your Murano. Stand a few feet away and press lock and unlock. Immediate response means success. It’s satisfying to see instant results after a few careful steps.
- Snap halves carefully
- Test buttons before full closure
- Avoid forcing the cover
- Test fob with the car
Testing Your Key Fob Functions
Stand at different distances from your Murano to test the fob. Sometimes range decreases if battery contacts aren’t perfect. Walk around while pressing buttons to confirm consistent operation.
Check all functions—lock, unlock, panic, and remote start if applicable. This ensures you didn’t misplace or misalign anything inside. A small adjustment now avoids major annoyance later.
Notice any sluggish response? Open the fob again and inspect the battery contacts. They may need a tiny clean with a dry cloth. Dirt or corrosion is subtle but can ruin performance.
Keep a mental note of battery lifespan. A fresh battery typically lasts 2–3 years. Tracking replacement helps prevent surprises. I jot it on my calendar every few years—it’s a simple habit that saves time.
- Test range in different areas
- Verify all buttons work
- Inspect contacts if sluggish
- Track battery lifespan
Troubleshooting Common Issues
If the fob doesn’t work after replacing the battery, first check orientation again. Misalignment is the most common culprit. Small mistakes are easy to overlook.
Look for bent or dirty contacts inside the fob. Sometimes they need a gentle adjustment. Avoid metal scrubbing, as it may damage them. A soft touch goes a long way.
Resetting the fob can help. Some Murano models require holding the lock button while pressing the key into the ignition. Check your manual for precise instructions. A little trial here can save a dealer visit.
Consider testing with a second battery. Occasionally, even new batteries can be defective. Keeping a backup ensures the problem isn’t the battery itself. It’s like having a spare key in your pocket—always comforting.
- Check battery orientation
- Inspect contacts for dirt or bends
- Reset the fob if needed
- Test with a backup battery
Final Thoughts
Replacing the battery in your 2018 Nissan Murano key fob isn’t a chore if you follow a careful approach. Small steps, attention to detail, and patience pay off. You’ll save money, avoid dealer trips, and gain confidence in handling small car maintenance tasks. A little preparation makes a big difference, and the process can even feel satisfying once completed successfully.
| Task | Detail | Tip/Note |
|---|---|---|
| Identify fob notch | Small seam on side | Use a coin or flat tool |
| Open fob | Pry gently | Avoid scratching |
| Remove battery | CR2032 inside | Take photo for orientation |
| Check battery | Inspect for leaks | Dispose responsibly |
| Insert new battery | Positive side up | Press flush, not forced |
| Snap fob closed | Align halves carefully | Listen for click |
| Test functions | Lock/unlock, panic, start | Walk a few feet for range |
| Track lifespan | Replace every 2–3 years | Note date on calendar |
Frequently Asked Questions (FAQs)
Is it hard to change the battery myself?
Not at all. With steady hands and a small tool, you can do it in a few minutes. Many fobs open easily at the seam, and careful attention prevents scratches. Taking a photo of battery orientation ensures proper installation. Most people find it satisfying to do themselves.
Can I use any CR2032 battery?
You can, but quality matters. Cheap batteries may not last as long or maintain proper voltage. Choose a reliable brand and check expiration date. Keeping a backup helps prevent surprises. Even small differences in brand or freshness affect fob performance.
Do I need to reset the fob afterward?
Sometimes. Certain Murano models require a reset procedure after battery replacement. Check your manual or hold the lock button while pressing the key into ignition. This ensures the fob communicates with the car properly. Testing all buttons afterward is always wise.
Is there a trick to open the fob easily?
Yes. Use a coin or small flat tool at the notch. Apply gentle pressure and twist slightly. Avoid forcing, as it may crack the plastic. Patience here prevents damage and makes the process smooth.
Can I damage the fob while replacing the battery?
Yes, if you rush. Scratching contacts, forcing the cover, or inserting the battery incorrectly can cause problems. Handle gently, note orientation, and avoid metal tools touching the contacts. Small care goes a long way.
Do I need to wear gloves when changing it?
Not strictly, but dry hands help. Gloves reduce slipping and accidental scratches. If your hands are sweaty or oily, a small cloth can help grip the battery safely. Safety and precision are worth a tiny effort.
Is there a way to know the battery is low before it dies?
Yes, often buttons respond slowly or inconsistently. Some Murano models may show a warning on the dashboard. Testing fob range and responsiveness can alert you early. Replacing before total failure saves frustration.
Can a new battery fail immediately?
Rarely, but it happens. Sometimes batteries have defects or poor contact. Keep a second battery handy and inspect contacts before blaming the fob. Most failures are simple fixes, not fob replacement.
