Replacing the Battery in Your Acura Key Fob
Having a dead battery in your Acura smart key fob can be inconvenient and disrupt your daily driving routine. This guide will walk through everything you need to know about replacing the battery in your Acura key fob, including signs of a low battery, which replacement battery to use, steps for changing it yourself, programming considerations, maintenance tips, where to buy new batteries, and more.
Types of Acura Key Fobs
Acura vehicles come equipped with integrated key fobs or Smart Entry key fobs:
- Integrated Key Fobs – This style of key fob has the fob built into the ignition key. It must be inserted into the ignition barrel to start the car.
- Smart Entry Key Fobs – These wireless fobs allow you to start your Acura without inserting anything into the ignition. They just need to be present in your pocket or purse within range. This is the most common style.
You may also use an aftermarket key fob with added functionality or features. But for battery replacement purposes, OEM Acura fobs are recommended.
What Battery Does An Acura Key Fob Use?
The small, flat coin cell battery that powers Acura key fobs can vary depending on the model:
- CR1620 – Used in older Acura models
- CR2025 – Modern replacement battery for all current models
When purchasing a replacement, double-check which battery your fob requires before ordering. Opt for a good quality battery from a leading brand.
Signs Your Acura Key Fob Battery Needs Replacement
Some signs it’s time to swap the battery in your Acura key fob include:
- Reduced key fob range
- Intermittent functionality
- Warning light flashes on your dashboard
- Issues starting the car with your key fob
- Unresponsiveness to buttons
Proactively replacing the battery every 2-3 years is recommended to avoid being caught without a working key fob.
Consequences of Not Replacing a Low Acura Fob Battery
Aside from the obvious annoyance of a non-functional key fob, not addressing a dead battery can lead to more severe issues:
- Getting stranded without a working key
- Locking yourself out of your car if you don’t have a backup method
- Vehicle security features are inoperable
- Costly tow truck and locksmith expenses
A simple $5 battery is inexpensive insurance against problems down the line.
How Often Should You Replace an Acura Key Fob Battery?
On average, plan to replace the coin cell battery in your Acura smart key every 2-3 years for optimal performance. Extreme hot or cold weather can impact lifespan. Signs like reduced range usually start popping up around this time indicating imminent battery failure.
Step-By-Step: How To Replace an Acura Key Fob Battery
With the right CR2025 replacement battery on hand, swapping out a dead Acura key fob battery is straightforward:
Supplies Needed
- New CR2025 coin cell battery
- Small Phillips head screwdriver
- Clean, lint-free cloth
Battery Replacement Instructions
- Hold down the smart key fob buttons for a few seconds to discharge any residual energy left in the battery.
- Locate the small screw on the back side of the fob. Carefully remove it with your screwdriver and pry open the case.
- Gently lift and slide out the expired coin cell battery. Be careful not to damage the small copper contact points it connects to.
- Check for any debris or moisture inside the battery compartment and clean it with a lint-free cloth if needed.
- Match the positive (+) sign on the new battery to the positive metal clip retainer when inserting. The negative side should press flat against the circuit board.
- Verify the battery is securely in place, then realign the fob case edges and reinsert the case screw. Tighten gently until snug.
- Press each fob button a few times once reassembled to confirm normal operation.
That’s all there is to it! Total time is less than 10 minutes for DIY battery replacement. Much cheaper than the $75-150+ an Acura dealer may charge.
Programming a New Acura Key Fob Battery
Most models will automatically sync and recognize a freshly swapped battery with no additional steps needed.
For security-equipped models like those with immobilizers, you may need to complete a brief programming procedure to pair the new battery with your vehicle. This usually involves turning the ignition off a few times.
Consult your owner’s manual or dealership if unsure whether your particular key needs programmed.
Tips for Extending Your Acura Key Fob Battery Life
To maximize lifespan between replacements:
- Minimize pressing fob buttons when out of vehicle range
- Keep key fobs away from excess heat or cold
- Stagger use between multiple registered fobs
- Consider primary battery use only
- Switch to CR2032 lithium batteries for longer-lasting charge
Proper care will ensure your smart fob’s battery lasts over 2 years before needing a change.
Where To Buy Replacement Batteries for Acura Key Fobs
You can pick up extra CR2025 or CR2032 coin cell batteries for your key fob at any of the following:
- Auto parts stores – Like AutoZone, O’Reilly, Advance, Pep Boys, etc. Call ahead to verify inventory.
- Hardware and grocery stores – Lowes, Home Depot, Walmart, and Target often sell multipacks.
- Electronics retailers – Best Buy, batteries plus franchise locations.
- Online at Amazon, eBay, Acura OEM, and battery retailers. Search by your exact model number for precision fit.
Pricing ranges from $2-5 per cell when buying multipacks. Stick with reputable brands like Energizer or Duracell for optimal lifespan over cheaper generic batteries that could leak or fail ahead of schedule.
FAQs – Key Fob Battery Replacement
Does an Acura dealer need to program the key fob after a battery change?
Most models will resynchronize on their own after swapping in a new battery, without needing additional programming. But some vehicles with chip keys do require proper pairing – check manuals to confirm.
What if the buttons still don’t work after replacing the battery?
If a fresh battery isn’t restoring functionality, the fob may have other internal damage needing repair. You can attempt cleaning the battery contacts with alcohol in case of corrosion before visiting a dealership or locksmith for service.
Is it safe to drive without a working key fob?
While driving an Acura without a powered key fob is possible in many models by using the metal backup key, you may lose access to conveniences like push button start which could lead to being stranded away from home. Replace the battery or fob ASAP.
How long does an Acura key fob battery last on average?
Approximately 2-3 years with normal average use before the charge begins fading. Extreme weather impacts this lifespan. Stick to a proactive replacement schedule.
Conclusion
Replacing the coin cell battery on your non-functional Acura smart key fob is an easy and affordable DIY fix. Know the signs of a dying battery and swap in a fresh CR2025 cell every few years. Consider keeping extras handy in your glove box to avoid getting caught without this critical driving accessory.