It’s a common frustration for Subaru owners: a key fob battery that seems to die too quickly. While battery replacement is a straightforward process, understanding why it happens and how to extend battery life can save you inconvenience and unexpected surprises. Let’s explore the primary factors affecting your Subaru key fob battery and when a battery change becomes necessary.
One significant factor is the quality control of the CR2032 coin battery itself. Not all CR2032 batteries are created equal. Even from reputable brands, occasional faulty batteries can slip through. If you have a battery tester, it’s a worthwhile step to check a new battery before installing it in your fob. This simple check can potentially prevent future headaches, even though you can still access and start your Subaru with a dead fob in an emergency. It’s also crucial to familiarize yourself with your emergency key and ensure it mechanically unlocks your door as a backup. For reliable replacements, consider reputable brands like Energizer or Duracell. While Panasonic batteries are also a good option, ensure you’re purchasing genuine ones, especially when ordering online.
Another often-overlooked aspect is usage habits. Do you frequently press the lock/unlock buttons on your key fob multiple times as you approach or leave your vehicle? This habit, driven by impatience or a desire for confirmation, can significantly accelerate battery discharge. A smarter approach is to utilize your Subaru’s touch-enabled locking and proximity unlocking features, if available. For those moments of doubt after walking away, the MySubaru/Starlink app offers a convenient way to check and control your vehicle’s lock status remotely, reducing unnecessary key fob button presses.
Furthermore, anecdotal evidence across various car brands suggests that storing your smart fob too close to your vehicle can contribute to battery drain in both the vehicle and the fob. To prevent this, maintain sufficient distance between your key fob and your Subaru when at home, allowing the vehicle to fully enter its “sleep” state. Alternatively, consider using a Faraday cage or valet box to store your fob. These specialized containers block electromagnetic fields, preventing communication between the fob and the car and minimizing battery drain when the fob is not in use.
By understanding these factors, you can proactively manage your Subaru key fob battery life. Regular checks of your emergency key and mindful usage habits, combined with quality battery replacements, will ensure your key fob remains a reliable tool for accessing and operating your vehicle.
