Is your 2009 Honda Accord key fob starting to act up? Weak signal or inconsistent performance can often be traced back to a low battery. Knowing the correct 2009 Honda Accord Key Fob Battery Type is the first step to a quick and easy fix. This guide will tell you exactly what battery you need and walk you through a simple replacement process.
The battery you’ll need for your 2009 Honda Accord key fob is a CR1616 3V lithium coin cell battery. This is a common type of watch battery, readily available at most drugstores, supermarkets, and online retailers. You won’t need any specialized automotive parts stores to find it.
Replacing the battery is a straightforward DIY task that can save you a trip to the dealership. Here’s how:
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Locate the small screw: On the back of your key fob, you’ll see a tiny Phillips head screw.
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Use the right screwdriver: A #0 Phillips head screwdriver is essential. For older key fobs where the screw might be tighter due to thread locking chemicals used by Honda, you might need to apply a little extra care. Some technicians recommend gently warming the screwdriver tip with a lighter or candle to help loosen the screw if it’s particularly stubborn.
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Carefully unscrew and open: Once the screw is removed, gently pry apart the two halves of the key fob casing. Many Honda key fobs have a small slot along the side to aid in separating the halves. Be patient and apply steady pressure to avoid damaging the plastic.
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Access the internal module: Inside, you’ll find a small black module containing the circuit board and battery.
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Open the module: This module also snaps open, usually from one end. A small flat-head jeweler’s screwdriver can be helpful here. Pay attention to the orientation of the two halves as they are designed to fit back together in only one way, ensuring proper contact with the battery.
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Identify and replace the battery: You’ll see the CR1616 battery nestled inside. Take note of its orientation (+ side up) before removing the old battery and installing the new one.
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Clean the contacts (Important for 2009+ models): Honda Accords and Pilots from this era are known to sometimes have a small amount of dielectric grease applied to the battery contacts during assembly. While intended to prevent corrosion, this grease can sometimes interfere with battery contact over time, leading to weak signal issues even with a new battery. If you see any grease on the battery contacts or the contact pads inside the module, gently wipe it away with a clean, dry cloth.
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Reassemble: Carefully snap the black module back together, ensuring the battery is correctly positioned. Then, reassemble the key fob casing, and finally, replace and tighten the small Phillips head screw.
With a fresh CR1616 battery and clean contacts, your 2009 Honda Accord key fob should be back to working reliably. This simple maintenance can save you time and money, keeping you on the road with a functional key fob.
