Check the Cell Before You Buy a Sportage Fob Battery

No official Kia source in hand names the coin cell for the 2023 Sportage remote. The closest thing to a model-specific figure is a third-party seller listing a CR2032 3V battery for the 2023–2024 Sportage application tied to FCC ID SY5SKRGE03, and that same seller tells buyers to open the remote and confirm the installed cell before ordering; its product is a battery only, not a fob (Rome Tech product listing). Generic Kia dealer guides refer to a single 2032 cell across the fob designs they cover, without naming the 2023 Sportage. So the working answer is: open the fob at its designated release point, read the full code stamped on the installed battery, photograph which face is up, and buy that exact code. CR2032 is the likely result, but the stamp on your own cell settles it, not the model year.

Enter what you can see on your fob; the battery and opening method update on the right.

What the Sources Confirm About the Battery Size

Two sources put a number on the battery, and neither is Kia itself.

Source	Battery named	Scope
Rome Tech listing	CR2032 3V	2023–2024 Sportage, FCC ID SY5SKRGE03; seller says confirm the installed cell first
South Dade Kia guide	2032	Generic Kia fob designs; does not identify the 2023 Sportage remote

The seller listing supports CR2032 only for the application it names. If you want to lean on it, compare the FCC ID printed on your own fob with SY5SKRGE03 before ordering. A different ID means the listing says nothing about your remote.

The dealership guide is broader. It refers to one 2032 battery for the Kia fobs its instructions cover, and it describes two opening patterns, a removable mechanical key used in a nearby slot or a small flat-head screwdriver used in a side slot, but it does not say which design came with each 2023 Sportage configuration (South Dade Kia’s generic fob guide).

That leaves the sequence that works regardless of trim or market: inspect the case for a removable mechanical key or a purpose-made side slit, open the shell using only that release point, read the entire code on the old cell, photograph which face is up, then buy the same code and keep the same orientation.

Find the Opening Point Before You Pry

Start with the case in your hand, not a generic photo online. These are the two common Kia opening patterns, and neither is confirmed as universal for the 2023 Sportage.

Visible feature	Opening method	Limitation
Removable mechanical emergency key	Release the blade and use it in the designated slot near the key compartment	Generic smart-key pattern; confirm your case has the matching slot
Purpose-made slit on the side	Insert a small flat-head screwdriver into the slit and pry gently	Generic standard-fob pattern; use only if the slit is clearly present

The ordinary seam between the shell halves is not an opening point. If your fob has neither the slot nor the slit, stop rather than improvising with another leverage point. The 2023 Sportage owner’s manual or a Kia parts or service counter can identify the remote.

Changing the Cell in a Smart Key With a Removable Blade

Use this procedure only when the remote contains a removable mechanical key and has a designated opening slot near the key compartment.

1. Remove the mechanical key. Press the small release button at the bottom of the fob and pull out the emergency blade.
2. Locate the opening slot. Look near the bottom of the remote or beside the opening the key came out of.
3. Open the shell. Insert the blade into that slot and twist gently until the case separates.
4. Record the battery details. Before moving the old cell, photograph its stamped code and which face is up.
5. Remove the old cell. Lift it from its holder without touching the circuit board more than necessary.
6. Install an exact match. Fit a battery with the same complete code, same face up as before.
7. Close the remote. Align the halves and press evenly around the edges until the case seats fully.
8. Reinstall the key. Slide the blade back in until it locks.

One generic Kia guide says the battery’s writing side faces down in the smart-key design it covers. That is not a universal polarity rule for every 2023 Sportage fob. The orientation of the cell already in your remote is the better reference, which is why the photograph in step 4 matters.

Changing the Cell Through a Side Screwdriver Slit

A side slit is the other generic Kia opening pattern. It has not been tied here to a specific 2023 Sportage trim or market, so use these steps only if your case clearly has a purpose-made slit.

1. Put the remote on a stable, well-lit surface.
2. Insert a small flat-head screwdriver into the side slit, not into the middle of the shell seam.
3. Pry or twist gently until the back panel starts to release.
4. Photograph the installed battery’s complete code and orientation.
5. Replace it with an exact match in the same orientation.
6. Align the cover and press it together evenly. If it will not close, reopen it and check the alignment rather than forcing it.

This follows a dealership description of a standard Kia remote, not a model-specific 2023 Sportage procedure (Tom Kadlec Kia’s battery guide).

Testing the Fob and Fixing a Swap That Did Not Work

After reassembly, test every function fitted to your vehicle and remote: lock, unlock, liftgate, panic alarm, passive entry, and starting the vehicle. A fob that locks and unlocks but will not start the car is a different fault from one that does nothing.

If operation is still intermittent or absent, work through the installation in this order.

1. Confirm the new cell’s complete code matches the old one.
2. Compare its polarity with the photograph you took before removal.
3. Remove and reseat the battery.
4. Check that the holder presses the cell firmly against its contacts.
5. Inspect the accessible contacts for dirt, residue, bending, or visible damage.
6. Clean accessible contacts carefully if needed.
7. Make sure the case is fully closed and nothing is trapped inside.
8. Try another known-good battery with the same complete code.

A failed battery change does not by itself prove the remote needs replacing. Poor contact, worn buttons, internal fob damage, or a vehicle-side fault can each leave the remote unresponsive.

Whether the Fob Needs Reprogramming After the Swap

The available guidance does not establish whether programming or resynchronization is required for every 2023 Sportage fob after a battery change. Do not assume it is always necessary or never necessary. If a correctly identified, properly seated, known-good battery does not restore operation, consult the Sportage owner’s manual or an official Kia service or parts source before paying for programming or a new remote. Programming does not fix a bad contact, and a new fob does not fix a vehicle-side fault.

Getting In and Starting the Sportage With a Dead Fob

Generic Kia guidance identifies the removable mechanical key as the backup for vehicle entry. Release the blade from the remote and use the vehicle’s mechanical-key access point. If that access point is concealed or not where you expect, follow the 2023 Sportage owner’s manual rather than prying at exterior trim.

For starting, dealership guidance says to hold a weak fob against the start button or press the button with the fob itself (Kia Delray’s generic key-fob guidance). That is not confirmation of the procedure for every 2023 Sportage configuration. If the vehicle does not respond, use the backup-start instructions in the owner’s manual.

Once the swap is done, the replacement is only complete when the new cell matches the old one’s full code and polarity, the shell is closed on every edge, and every equipped remote and proximity function works. If a correctly installed battery still leaves the fob dead, the next call is to the owner’s manual or Kia, not to a programming service.