Lincoln MKX Key Fob Battery Replacement

2016-2018 Models

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

Smart Key Fob – FCC ID M3N-A2C31243300

2016-2018 Lincoln MKX Smart Key Fob – FCC ID M3N-A2C31243300
Battery Type
CR2025 x2
Buy CR2025 x2 on Amazon
✓ OEM Compatible
✓ Free Prime Shipping
Lincoln MKX Smart Key Fob – FCC ID M3N-A2C31243300 Battery Replacement Video
FCC ID: M3N-A2C31243300
Replacement Steps for Smart Key Fob – FCC ID M3N-A2C31243300

Tools needed: Small flathead screwdriver

Open the case Fit a small flathead screwdriver into the notch and twist gently until the halves separate. Work along the edge instead of forcing one spot.
Take out both old batteries The Lincoln MKX smart key fob holds two CR2025 batteries. Note which way each one faces, then lift them out.
Fit the new batteries Put the new CR2025 batteries in with the positive (+) side facing the same way as the old one, one at a time.
Close it up and test Line up the halves and press until they click, then try lock and unlock from a few feet away.
Alternative

Smart Key Fob – FCC ID M3N-A2C94078000

2016-2018 Lincoln MKX Smart Key Fob – FCC ID M3N-A2C94078000
Battery Type
CR2450
Buy CR2450 on Amazon
✓ OEM Compatible
✓ Free Prime Shipping
Lincoln MKX Smart Key Fob – FCC ID M3N-A2C94078000 Battery Replacement Video
FCC ID: M3N-A2C94078000, M3N-A2C940780
Replacement Steps for Smart Key Fob – FCC ID M3N-A2C94078000

Tools needed: Small flathead screwdriver

Take out the emergency key Press or slide the release on the Lincoln MKX 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 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.

Frequently Asked Questions

What battery does a Lincoln MKX key fob use?

It depends on the key: the Smart Key Fob – FCC ID M3N-A2C31243300 uses a CR2025 x2; the Smart Key Fob – FCC ID M3N-A2C94078000 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 Lincoln MKX key fob battery is dying?

Signs your Lincoln MKX 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 Lincoln MKX key fob battery last?

A Lincoln MKX 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 Lincoln MKX key fob battery myself?

Yes, replacing a Lincoln MKX key fob battery is a simple DIY task that takes under 5 minutes. You only need a new CR2025 x2 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 Lincoln MKX 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 CR2025 x2 or CR2450 battery?

CR2025 x2 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.