Table of Contents
Why It Matters
Your Harley’s security system depends on your key fob. A weak or dead battery can leave you fumbling with the PIN override or stuck roadside. The good news: replacing the fob battery takes less than 5 minutes, costs just a few dollars, and doesn’t require dealer reprogramming.
Pro Tip: Harley recommends replacing the fob battery once a year as preventative maintenance.
What You’ll Need
- 1 × CR2032 3V coin cell battery (Check Price Here)
- Small flat-blade screwdriver, coin, or guitar pick
- Clean cloth or paper towel
Step-by-Step Guide To Replace Your Harley Key Fob Battery
STEP 1. Prep the fob
Lay it on a clean, soft surface. If your current battery is dead, be ready to use your PIN override to start the bike the first time.
STEP 2. Locate the notch
On the side of the fob, find the small slot (thumbnail groove).
STEP 3. Open the fob
Insert a coin, guitar pick, or flat-blade screwdriver into the notch. Twist gently until the fob pops open.
Don’t rush, many riders cracked the plastic forcing it.
STEP 4. Remove the old battery
Lift out the battery.
Note its orientation before removing (on most models, the positive (+) side faces down, but some later models are the opposite).
STEP 5. Insert the new CR2032
Fit the new battery in the same orientation as the old one. Hold it by the edges, fingerprints or moisture on the surface can shorten battery life.
Remove any thin plastic film that may cover new coin cells.
STEP 6. Snap the fob back together
Align the two halves and press until they click securely with no gaps.
STEP 7. Test your fob
Walk up to your Harley. The security light should switch off, and you should be able to turn the ignition without entering the PIN
Rider Tips & Common Mistakes
- Carry a spare battery: Many riders tape one inside their saddlebag or tool pouch.
- Use non-marring tools: A guitar pick or plastic scraper avoids scratches.
- Don’t panic if it dies: You can always start your bike with the PIN override.
- Check waterproofing: Riders have reported accidentally washing the fob with no damage, but don’t rely on luck.
- Replace annually: Saves headaches on long trips.
FAQ
What battery do Harley fobs use?
Most use a CR2032 lithium coin cell. Always check your owner’s manual or the number on the old battery.
Do I need to reprogram the fob after swapping the battery?
No. Just replace the battery and ride. Even if the battery is completely dead, the fob should retain its pairing with your bike.
Which way does the battery go in?
Depends on your model:
- Many older fobs: Positive (+) side down
- Some newer models: Positive (+) side up
Always check before removing the old one.
How long does the battery last?
Typically 1-2 years. Some riders report up to 4 years, but Harley recommends yearly replacement.
My fob won’t open, what should I do?
If the plastic is stuck (often from heat/sun exposure), use a plastic guitar pick instead of metal tools to reduce damage.
My bike keeps asking for the PIN after replacement, why?
Usually caused by:
- Battery installed in the wrong orientation
- Poor contact or dirt inside
- A defective coin cell
Can touching the battery with my fingers cause problems?
Yes. Oils and moisture can reduce conductivity. Handle only by the edges.
Why does Harley charge $200 for this service?
Dealers often bundle diagnostics with simple fixes. Doing it yourself costs under $10.
Final Thoughts
Replacing your Harley key fob battery is quick, cheap, and saves you from unnecessary dealership fees. Keep a spare CR2032 with you. It’s peace of mind on every ride.
Get the CR2032 battery you need here: Amazon CR2032