Understanding the 2018 Subaru Crosstrek key fob battery is essential for any owner who relies on the convenience of keyless entry. The intelligent access system, a standard feature on this model year, allows for hands-free operation, but it is entirely dependent on a reliable power source. When the battery inside the key fob dies, the system shuts down, rendering the remote useless and requiring a physical key for access, which can be an inconvenient surprise.
Identifying a Failing Battery
The signs of a weak battery in your 2018 Crosstrek key fob are usually gradual and easy to miss until it is too late. Owners might notice that the remote door unlock feature requires multiple presses or significantly more physical force to activate the button. The most definitive indicator is the complete failure of the system, where pressing any button results in no response from the vehicle, signaling that the coin cell battery has reached the end of its lifespan.
Required Battery Specifications
To ensure compatibility and proper function, it is critical to use the correct replacement part. The key fob for the 2018 Subaru Crosstrek utilizes a specific type of small button cell battery to power the internal circuitry and the rolling code transmitter. Using the wrong voltage or size can result in a non-functioning remote or potential damage to the key fob housing.
Step-by-Step Replacement Guide
Replacing the 2018 Subaru Crosstrek key fob battery is a straightforward process that requires minimal tools and technical knowledge. The design is intended for user maintenance, eliminating the need for a visit to the dealership for this specific task. By following a careful sequence, you can open the fob without breaking the plastic clips or exposing the internal components to damage.
Tools and Preparation
Before beginning the procedure, gather the necessary items to ensure a smooth replacement. You will need a fresh CR2032 battery, which is widely available at pharmacies, hardware stores, or online retailers. Additionally, a small, flathead screwdriver or a coin is required to apply the leverage needed to separate the two halves of the key fob housing.
Physical Disassembly
The process begins by locating the small slot on the back of the key fob. Inserting the chosen tool into this slot allows you to apply steady pressure to pop the case open. It is important to proceed slowly here, as the internal circuit board is connected to the battery holder and the remote buttons. Once the seam opens, carefully remove the old battery, noting the orientation of the positive and negative sides, usually marked inside the fob.
Programming and Reset Procedures
One of the primary concerns for owners replacing the battery themselves is whether the system needs to be reprogrammed. For the 2018 Subaru Crosstrek, the key fob is designed to sync automatically with the vehicle's computer system upon battery replacement. This eliminates the need for a dealer visit, provided the new battery is installed correctly and the fob is within range of the car during startup.
Re-syncing the Remote
If the remote fails to function immediately after installing the new battery, a simple reset procedure is required. This involves cycling the ignition key between the "Off" and "On" positions multiple times within a specific timeframe. This action wakes up the vehicle's receivers and allows the key fob to re-establish communication, restoring the security and convenience features without professional assistance.
