Experiencing issues with your 2004 Wrx Key Fob can be frustrating. It’s a common problem as vehicles age, and key fobs, despite their robust design, can become less reliable over time. One owner of a 17-year-old Subaru Forester XT, which shares similar key fob technology with the 2004 WRX, is facing this exact situation. Their key fobs are working intermittently, sometimes requiring multiple button presses at varying distances from the vehicle to function.
A logical first step is to check the key fob battery. The owner correctly tested the battery voltage while pressing the button and got a reading of 3.0V, which is generally considered a good voltage for these types of batteries. However, even with a good battery, issues can still arise. It’s not always just about the battery voltage; internal fob components can degrade, or contact points can become less effective.
If battery replacement isn’t the solution, the problem might lie with the vehicle’s receiver. The receiver is responsible for picking up the signal from your 2004 WRX key fob and activating the car’s functions like locking and unlocking. A failing receiver can lead to the symptoms described – inconsistent responses and reduced range.
Considering replacement options for a 2004 WRX key fob, owners often wonder where to purchase a new one. Subaru dealerships are a reliable source, ensuring you get a genuine OEM fob programmed specifically for your vehicle. However, dealership options can be more expensive. Alternatively, online marketplaces like Amazon or eBay offer aftermarket fobs at potentially lower prices. While these can be more budget-friendly, it’s crucial to ensure compatibility and reliability before purchasing. Programming aftermarket fobs might also require specific tools or a locksmith.
The owner also investigated the RF frequency, expecting to see a signal around 315MHz (common in the US) using an SDRPlay radio. The fact that no signal was detected, even when close to the antenna, could indicate a very weak signal from the aging fob or a more complex issue within the fob’s transmitter.
In conclusion, flaky key fob behavior in a 2004 WRX or similar Subaru model can stem from various sources. While a good battery is essential, the issue could also be a degrading key fob transmitter or a problem with the car’s receiver. Exploring replacement options from dealerships to online retailers is possible, but careful consideration of compatibility and programming is necessary. For a definitive diagnosis, consulting a professional mechanic or a key fob specialist is recommended.
