Is your 2017 Hyundai Sonata key fob not working as reliably as it used to? You might be facing a common issue: a dead or dying key fob battery. Fortunately, replacing the battery in your Hyundai Sonata key fob is a straightforward process that you can easily handle yourself, saving you time and money compared to visiting a dealership. This guide will walk you through everything you need to know about 2017 Hyundai Sonata Key Fob Battery Replacement.
The battery inside your smart key fob is crucial for its functionality. These fobs are constantly emitting a low-power radio frequency (RF) signal, allowing features like proximity unlocking, puddle lights, and automatic trunk opening to work when you’re near your vehicle. This constant activity, while convenient, does mean that key fob batteries have a limited lifespan, typically around 2-3 years for smart fobs. Unlike older, non-proximity key fobs which only use battery power when a button is pressed, smart fobs are always ‘on’ to detect your presence.
When replacing your 2017 Hyundai Sonata key fob battery, there are a couple of important points to keep in mind. Firstly, pay very close attention to the battery orientation when you open the fob. While some Hyundai owner’s manuals might have illustrations that are not entirely clear, correct orientation is essential for the fob to work. Typically, the positive (+) side of the battery should be facing downwards, but always double-check the markings inside your key fob. Incorrect orientation won’t damage the fob, but it simply won’t function.
Secondly, battery voltage is a key indicator of its health. The CR2032 battery commonly used in Hyundai key fobs is rated at 3VDC. However, a brand new battery will actually measure around 3.3VDC. If you test your old battery with a voltmeter and it reads below 3VDC, it’s definitely time for a replacement. Thinking it’s still good at “about” 3VDC can be misleading, as this likely indicates a significantly weakened battery.
Another factor to consider is parasitic battery drain. Smart keys are designed to communicate with your vehicle when in close proximity. If you routinely store your key fob very close to your parked 2017 Hyundai Sonata – for example, inside your house near the garage – the continuous communication can keep the car’s system partially active. This “parasitic draw” can not only drain your car battery over time but can also prematurely deplete your key fob battery as it constantly responds to the vehicle’s signals. To prevent this, try to store your key fob further away from your car when you are at home.
In conclusion, replacing the battery in your 2017 Hyundai Sonata key fob is a simple maintenance task. By understanding the battery type, voltage, correct orientation, and potential for parasitic drain, you can ensure your key fob remains reliable and functional for years to come. Remember to check your battery voltage if you suspect a problem, and be mindful of where you store your key fob to maximize both fob and car battery life.
