Replacing the battery in your Lexus ES 350 key fob is a straightforward task that any car owner can handle. You don’t need special tools or technical expertise, and definitely no need to visit the dealership for this simple maintenance. This guide will walk you through everything you need to know about changing your Lexus ES 350 key fob battery, ensuring your remote continues to work reliably.
One common question among Lexus owners is about the lifespan of their key fob batteries and how to replace them when they eventually run out. Just like any battery, the one in your Lexus ES 350 key fob will need replacing periodically. You might start noticing the dreaded “low key battery” warning on your dashboard, or perhaps your key fob becomes less responsive. These are clear signs it’s time for a new battery.
Opening Your Lexus ES 350 Key Fob
The first step is to access the battery inside your Lexus ES 350 key fob. While specific designs can vary slightly depending on the year of your ES 350, most Lexus key fobs are designed to be easily opened. Typically, you will find a small release button or a notch on the side of your key fob.
Using your finger or a small flathead screwdriver, gently press the release button or insert the screwdriver into the notch to pry the key fob open. Be careful not to apply too much force, as you don’t want to damage the casing. Once you’ve released the catch, the key fob should split open, revealing the battery compartment.
Identifying the Correct Battery
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Panasonic CR2032 batteries for Lexus key fob replacement
The battery you’ll need for your Lexus ES 350 key fob is a CR2032 battery. This is a common 3V lithium coin cell battery that is widely available at drugstores, supermarkets, and online retailers like Amazon. It’s always a good idea to double-check the battery type before purchasing, which you can usually confirm by looking at the old battery once you’ve opened the key fob. Brands like Panasonic and other reputable manufacturers offer reliable CR2032 batteries for key fobs.
It’s worth noting that purchasing batteries in bulk online can often be more cost-effective than buying them individually at local stores. However, ensure you are buying from a reputable seller to guarantee the quality and freshness of the batteries.
Key Fob Battery Life and Maintenance
The lifespan of a Lexus ES 350 key fob battery can vary depending on usage and environmental factors. On average, you can expect a key fob battery to last anywhere from 1 to 3 years. However, factors like frequent use of the remote start feature or keeping the key fob in extreme temperatures can shorten battery life.
A common question is whether a spare key fob battery will drain even when not in use. While it’s less likely to drain as quickly as a frequently used fob, batteries do have a shelf life and can slowly discharge over time, even when idle. If you have a second key fob that you rarely use, it’s generally not necessary to remove the battery. However, storing spare batteries separately in a cool, dry place is always a good practice to maximize their shelf life.
Emergency Start with a Dead Key Fob Battery
Even if your Lexus ES 350 key fob battery is completely dead, you can still start your car. Lexus vehicles are equipped with a backup system that allows you to start the car by holding the key fob close to the start button. This system uses a chip in the key fob that doesn’t require battery power to communicate with the vehicle and allow it to start.
So, if you find yourself with a dead key fob battery, don’t worry. Simply hold your Lexus ES 350 key fob directly against the engine start button, and then press the start button as you normally would. Your car should start right up, giving you time to replace the battery at your convenience. There is no separate slot for a mechanical key to start the car in modern Lexus ES 350 models.
Conclusion
Replacing the battery for your Lexus ES 350 key fob is a simple and inexpensive DIY task. By following these steps, you can ensure your key fob remains functional and avoid any inconvenience. Keeping a spare CR2032 battery on hand is always a good idea so you are prepared when the low battery warning appears. And remember, even with a dead battery, your Lexus ES 350 has a backup starting procedure to get you on your way.
