Jeep Grand Cherokee Key Fob Battery Replacement

2014-2024 Models

This vehicle has multiple key fob types. Select your key below.

Most Common

Smart Key Fob – FCC ID M3N-40821302 (2014–2022)

Battery Type

CR2032

Buy CR2032 on Amazon

✓ OEM Compatible

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FCC ID: M3N-40821302

Replacement Steps for Smart Key Fob – FCC ID M3N-40821302 (2014–2022)

Tools needed: Small flathead screwdriver

Take out the emergency key Press or slide the release on the Jeep Grand Cherokee smart key fob and pull the metal key blade out. The slot it leaves is your way into the case.

Open the case Fit a small flathead screwdriver into the notch where the key came out and twist gently until the halves separate. Work along the edge instead of forcing one spot.

Take out the old battery Note which way the CR2032 faces, then lift it out with a fingernail or a small screwdriver tip.

Fit the new battery Put the new CR2032 in with the positive (+) side facing the same way as the old one, and press it flat into its holder.

Close it up and test Line up the halves and press until they click, slide the emergency key back in, then try lock and unlock from a few feet away.

Alternative

Smart Key Fob – FCC ID M3NWXFOB1 (2021–2024)

Battery Type

CR2450

Buy CR2450 on Amazon

✓ OEM Compatible

✓ Free Prime Shipping

Jeep Grand Cherokee Smart Key Fob – FCC ID M3NWXFOB1 (2021–2024) Battery Replacement Video

FCC ID: M3NWXFOB1, 2BAHD-KFW1

Replacement Steps for Smart Key Fob – FCC ID M3NWXFOB1 (2021–2024)

Tools needed: Small flathead screwdriver

Take out the emergency key Press or slide the release on the Jeep Grand Cherokee smart key fob and pull the metal key blade out.

Open the case Fit a small flathead screwdriver into the seam between the two halves and twist gently until the halves separate. Work along the edge instead of forcing one spot.

Take out the old battery Note which way the CR2450 faces, then lift it out with a fingernail or a small screwdriver tip.

Fit the new battery Put the new CR2450 in with the positive (+) side facing up, and press it flat into its holder.

Close it up and test Line up the halves and press until they click, slide the emergency key back in, then try lock and unlock from a few feet away.

Frequently Asked Questions

What battery does a Jeep Grand Cherokee key fob use?

It depends on the key: the Smart Key Fob – FCC ID M3N-40821302 (2014–2022) uses a CR2032; the Smart Key Fob – FCC ID M3NWXFOB1 (2021–2024) uses a CR2450. All are 3-volt lithium coin batteries, available at most grocery stores, pharmacies, and online retailers.

How do I know if my Jeep Grand Cherokee key fob battery is dying?

Signs your Jeep Grand Cherokee key fob battery is dying include: reduced range (having to get closer to unlock), intermittent button response, delayed unlocking, the low battery warning on your dashboard, or buttons requiring multiple presses to work.

How long does a Jeep Grand Cherokee key fob battery last?

A Jeep Grand Cherokee key fob battery typically lasts 2-4 years depending on usage. Frequent use, extreme temperatures, and proximity to electronic devices can shorten battery life.

Can I replace my Jeep Grand Cherokee key fob battery myself?

Yes, replacing a Jeep Grand Cherokee key fob battery is a simple DIY task that takes under 5 minutes. You only need a new CR2032 or CR2450 battery and optionally a small flathead screwdriver. No dealer visit or programming is required.

Do I need to reprogram my key fob after replacing the battery?

No, you do not need to reprogram your Jeep Grand Cherokee key fob after replacing the battery. The fob retains its programming during battery changes. Simply insert the new battery and test the buttons.

Where can I buy a CR2032 or CR2450 battery?

CR2032 or CR2450 batteries are available at Walmart, Target, CVS, Walgreens, Amazon, auto parts stores like AutoZone and O'Reilly, and most grocery stores. They typically cost $6-12 for a 2-pack.

Jeep Grand Cherokee Key Fob Battery Replacement

Smart Key Fob – FCC ID M3N-40821302 (2014–2022)

Smart Key Fob – FCC ID M3NWXFOB1 (2021–2024)

Frequently Asked Questions

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