Replace Key Battery medium urgency

Dead Key Fob Battery: 2024 Hyundai Palisade (US) Quick Fixes & Start/Unlock Tips

If your 2024 Hyundai Palisade key fob suddenly won’t lock/unlock or the vehicle won’t detect the fob, the most common cause is a dead (or weak) fob battery. The good news: you can usually still unlock the door and start the SUV using the built-in emergency procedures until you replace the battery.

Understanding Your Situation

The coin-cell battery inside the Palisade smart key has dropped below the voltage needed to transmit a strong signal. The vehicle may show a “Key not detected”/similar warning, and remote lock/unlock and remote start (if equipped) may stop working or become intermittent.

🚀 Immediate Steps to Take

  1. Unlock manually: Slide the release on the smart key to remove the hidden mechanical key, then unlock the driver’s door using the key cylinder.
  2. Start the vehicle using the backup method: With your foot on the brake, hold the Hyundai logo side of the smart key against/very near the START/STOP button and press the button to start (the car can read the transponder even if the fob battery is dead).
  3. Replace the coin-cell battery as soon as possible: Open the fob case carefully and install a fresh battery (commonly CR2032 on Hyundai smart keys—confirm by checking the marking on the old battery or your owner’s manual).

Your Options

DIY key fob battery replacement (most common)

Cost: $3-$10 Time: Same day

Open the smart key case, remove the old coin-cell battery, and install a new one with the correct polarity. Test lock/unlock and starting afterward.

✓ Pros:
  • Fast and inexpensive
  • No special tools or programming typically required
✗ Cons:
  • Risk of damaging the case or rubber seals if pried incorrectly
  • Using the wrong battery type or installing it backwards will not fix the issue

Battery replacement at a dealer or reputable auto locksmith

Cost: $10-$40 Time: Same day

A technician opens the fob, replaces the battery, and checks that the fob functions properly (and may inspect for corrosion or physical damage).

✓ Pros:
  • Lower chance of breaking clips or seals
  • Helpful if the fob is already cracked, sticky, or intermittent
✗ Cons:
  • Costs more than DIY
  • May require a visit during business hours

Replace the entire smart key fob (if battery doesn’t solve it)

Cost: $250-$600 Time: 1-3 days

If a new battery doesn’t restore operation, the fob may be damaged (water intrusion, broken buttons, internal failure). Replacement fobs must be matched/programmed to the vehicle.

✓ Pros:
  • Fixes issues caused by internal fob failure
  • Restores full remote functions reliably
✗ Cons:
  • Most expensive route
  • Programming/verification is typically required

⚠️ What to Avoid

✕ Don’t force the fob open with a large screwdriver or metal pry tool—broken clips and case gaps can lead to water intrusion later.

✕ Don’t assume it’s the car battery immediately; a weak fob battery often causes intermittent detection and short range first.

✕ Don’t touch the new coin-cell battery surfaces excessively or install it without confirming the +/− orientation; contamination or reversed polarity can cause poor contact.

⚠️ Common Mistakes to Avoid

  • Using wrong battery type
  • Damaging case during opening
  • Not resetting after replacement
  • Buying expensive batteries

Frequently Asked Questions

Can I drive my 2024 Palisade if the key fob battery is dead?

Yes. You can unlock the door with the hidden mechanical key and start the vehicle using the backup start method by holding the fob against/very near the START/STOP button while pressing the brake and the button. Once started, you can drive normally, but replace the fob battery soon to avoid being stranded after you shut it off.

What battery does the 2024 Hyundai Palisade key fob use?

Many Hyundai smart keys use a CR2032 coin-cell battery, but it’s best to confirm by opening your fob and reading the number printed on the existing battery (or checking the owner’s manual) before buying a replacement.

Do I need to reprogram the key fob after changing the battery?

Usually no. Replacing the coin-cell battery typically does not erase programming. If the fob still won’t work after a fresh battery, there may be a contact issue, internal damage, or a vehicle-side problem that needs diagnosis.

My fob works up close but not from a distance—does that mean the battery is dying?

Often, yes. Reduced range and intermittent unlocking are classic signs of a weak coin-cell battery. Replace the battery first before assuming the fob or vehicle receiver has failed.

⏱️ Urgency Note: Moderate urgency: replace the fob battery promptly. You can usually start the Palisade using the backup method, but a dead fob battery can leave you unable to conveniently unlock/start the vehicle—especially if you park and shut it off away from home.

Related Information

Need Detailed Information?

Get vehicle-specific key fob compatibility, part numbers, and a complete price comparison for your 2024 Hyundai Palisade.

View Palisade Key Fob Guide →

Last updated: 2026-01-04