Replacing the battery in your 2020 Hyundai Santa Fe key fob is a straightforward procedure that saves time and money. The original equipment manufacturer design relies on a standard CR2032 3V lithium coin cell, which typically provides reliable service for several years before the signal begins to weaken. When the battery depletes, you might notice a reduced range from your remote or a complete lack of response when pressing the buttons. This guide details the exact steps required to open the key fob housing, remove the old cell, and install the new battery without damaging the internal components.
Identifying the Correct Battery for Your Santa Fe
Ensuring you have the correct component is the most critical step in the process. While some manufacturers use proprietary batteries, the 2020 Santa Fe key fob uses a widely available standard size. Using the wrong voltage or dimensions can result in a non-functional remote or potential leakage damage. Confirm your model year and key design, but in most cases, the required cell is a CR2032. This specific lithium manganese dioxide battery provides the necessary 3 volts to power the remote's transmitter circuit and integrated circuit.
Tools Required for the Replacement
You do not need a professional mechanic’s toolkit to access the battery. The design of the key fob allows for easy access using common household items. The primary requirement is a small, flat-head screwdriver or a coin with a thin edge to pry open the plastic seam. Additionally, having a clean workspace and good lighting will help prevent losing the small internal components. Avoid using sharp tools that could puncture the battery casing or scratch the exterior shell of the key.
Step-by-Step Disassembly Process
Begin by locating the small seam running around the perimeter of the key fob. This seam hides a tiny groove designed for insertion of your prying tool. Insert the screwdriver or coin into this groove and apply gentle pressure to separate the two halves of the shell. The key fob is designed with internal plastic latches that hold the casing together. Work slowly around the circumference, applying even pressure until the two sides pop apart. Once open, you will see the circuit board and the battery held in place by a small plastic clip.
Handling the Internal Components
With the casing open, carefully lift the circuit board out of the shell to access the battery. Note the orientation of the battery within the holder; there is usually a positive (+) side indicated on the plastic housing. Before removing the old battery, observe the clip mechanism that secures it in place. You will typically need to push one side of the clip inward or lift a small tab to release the battery. Avoid forcing the battery out, as the clip is designed to be flexible.
Installing the New Battery
When inserting the new CR2032 battery, orientation is essential. Lithium coin cells have a positive side, usually marked with writing or a plus sign, which must face up toward the circuit board. Place the new battery into the holder with the correct orientation, ensuring it sits flush against the contacts. Before snapping the plastic clip back into place, verify that the battery is secure and does not move when the key fob is shaken gently. A loose battery will cause intermittent connectivity issues.
Reassembly and Testing
After securing the battery, place the circuit board back into the key fob shell, aligning it with the designated slots. Lower the cover back onto the battery and circuit board, ensuring that no wires or components are pinched. Apply firm and even pressure around the edges until you hear the distinct click of the latches engaging. Finally, test the remote by pressing the buttons and observing the range. If the vehicle does not respond, double-check the battery orientation and the security of the connections.
