Owners of a 2017 Nissan Sentra often rely on the convenience of the key fob to secure and access their vehicle, but when the key fob battery dies, this convenience disappears instantly. Understanding the specific battery type, the replacement procedure, and the programming requirements ensures you can restore full functionality without unnecessary hassle or a trip to the dealer.
Identifying the Correct Battery for Your 2017 Sentra
The key fob for your 2017 Nissan Sentra uses a specific type of coin cell battery to power the remote locking, unlocking, and panic features. It is crucial to use the correct specification to ensure proper voltage and long-term reliability. Using the wrong size or voltage can result in a non-functional fob or potential damage to the internal circuitry.
CR2032 Specifications
The standard battery for the 2017 Sentra key fob is a CR2032 lithium coin cell. This battery offers a 3-volt capacity and is known for its stable discharge curve and long shelf life. When purchasing a replacement, look for reputable brands to avoid corrosion issues that can plague cheaper alternatives.
Voltage: 3 Volts
Type: Lithium Manganese Dioxide
Diameter: 20mm
Thickness: 3.2mm
Step-by-Step Replacement Procedure
Replacing the battery is a straightforward process that requires minimal tools. You will need a small flathead screwdriver or a coin to pry open the key fob casing. Ensuring you have the battery orientation correct is the critical step to avoid malfunction.
Tools and Preparation
Before beginning, ensure you have the new CR2032 battery ready. It is recommended to have the replacement battery tested with a multimeter if you are unsure of its charge level. Work on a clean, flat surface to prevent losing the small internal components.
1
Locate the small key fob release button on the side of the fob.
2
Press the button to slide off the mechanical key portion.
3
Use the screwdriver to gently pry the two halves of the fob apart.
4
Remove the old battery, noting the positive (+) side orientation.
5
Insert the new battery with the positive side facing up.
6
Snap the fob casing back together and reattach the key ring.
Programming and Resyncing the Key Fob
After installing the new battery, you might need to re-sync the fob with the vehicle's computer. While the 2017 Sentra typically maintains the programming, a dead battery can sometimes cause the system to lose the fob's signal. The Nissan Security System ensures that the vehicle remains secure, but a simple reset can confirm the fob is communicating correctly.
Manual Sync Procedure
If the buttons feel unresponsive, you can perform a manual sync without visiting a mechanic. This involves cycling the ignition and pressing specific buttons on the fob to re-establish the radio frequency connection. This process refreshes the rolling code transmitter inside the key.
