Experiencing issues with your 2011 Lexus RX 350 key fob? A common culprit is often the key fob battery. If you’re finding your key fob is working intermittently or not at all, especially after a period of inactivity, a weak or dead battery could be the reason. Let’s delve into understanding, troubleshooting, and resolving key fob battery issues for your 2011 Lexus RX 350.
One Lexus owner recently shared their experience of a potentially weak key fob battery. After finding their misplaced key fob, they suspected the battery might be the issue, particularly after the vehicle had been unused for several months. This scenario is quite typical, as key fob batteries can weaken over time, especially in periods of infrequent use or extreme temperatures.
Recognizing a Weak Key Fob Battery in Your Lexus RX 350
Before assuming a more complex problem, it’s crucial to identify the telltale signs of a dying key fob battery. Here are common indicators for your 2011 Lexus RX 350:
- Reduced Range: You need to be closer to your vehicle than usual for the key fob to lock, unlock, or activate the panic alarm.
- Intermittent Functionality: The buttons on your key fob become less responsive, requiring multiple presses to perform an action. Sometimes it works, and sometimes it doesn’t.
- Dashboard Warning Light: Some Lexus models may display a warning message on the dashboard indicating a low key fob battery. While not all 2011 RX 350s have this specific warning, it’s something to be aware of in newer models.
- Difficulty Starting the Engine (Push-Button Start): If your RX 350 has push-button start, a weak key fob battery might make it harder for the system to detect the key, occasionally requiring you to hold the fob closer to the start button.
- No Response at All: In the most extreme case, the key fob might completely stop working, leaving you unable to remotely lock or unlock your doors.
If you’re experiencing any of these symptoms, replacing the key fob battery is a straightforward first step in troubleshooting.
Step-by-Step Guide to Replacing Your 2011 Lexus RX 350 Key Fob Battery
Replacing the battery in your 2011 Lexus RX 350 key fob is a simple DIY task that you can accomplish in just a few minutes with minimal tools. Here’s how:
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Identify the Key Fob Type: The 2011 Lexus RX 350 typically uses a smart key fob. Locate the small release button or latch on your key fob.
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Open the Key Fob Casing:
- For Fobs with a Release Button: Press and hold the release button. This will usually allow you to remove a physical key or separate the fob casing.
- For Fobs with a Latch/Split: Look for a small notch or split line on the side of the fob. You may need a small flathead screwdriver or a coin to gently pry open the casing at this point. Be careful not to scratch the plastic.
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Locate the Battery: Once the casing is open, you’ll see the battery compartment. The battery is usually a small, round, coin-cell type.
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Remove the Old Battery: Note the orientation of the battery (+ side up or down) before removing it. You might be able to gently pry it out with your fingertip or the small screwdriver.
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Install the New Battery: The 2011 Lexus RX 350 key fob commonly uses a CR2032 battery. Ensure you are using the correct type. Install the new battery in the same orientation as the old one.
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Reassemble the Key Fob: Carefully snap the key fob casing back together until it’s securely closed. Ensure all parts are aligned correctly.
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Test the Key Fob: Test the buttons to ensure the key fob is now working correctly. Lock and unlock your doors remotely and try starting your vehicle if it has push-button start.
An example of a Lexus key fob similar to those used for the 2011 RX 350. The image shows a typical smart key with buttons for lock, unlock, panic, and trunk release.
Choosing the Right Replacement Battery
Using the correct battery type is essential for optimal key fob performance. For the 2011 Lexus RX 350 key fob, the CR2032 3V lithium coin battery is the standard replacement. These batteries are widely available at:
- Automotive Parts Stores: AutoZone, Advance Auto Parts, O’Reilly Auto Parts, etc.
- Drugstores and Pharmacies: Walgreens, CVS, Rite Aid.
- Big Box Retailers: Walmart, Target.
- Online Retailers: Amazon, eBay.
When purchasing, opt for reputable brands like Panasonic, Duracell, or Energizer to ensure quality and longevity.
Extending Your Key Fob Battery Life
While key fob batteries are consumables, you can take steps to maximize their lifespan:
- Avoid Extreme Temperatures: Extreme heat or cold can shorten battery life. Try not to leave your key fob in direct sunlight or freezing temperatures for extended periods.
- Limit Button Presses: Avoid unnecessary button presses when you are out of range of your vehicle.
- Store Keys Away from Electronic Devices: Although less common, strong electromagnetic fields from devices could potentially drain battery faster if keys are kept very close.
By understanding the signs of a weak key fob battery and knowing how to replace it, you can ensure reliable access to your 2011 Lexus RX 350 and avoid the inconvenience of a malfunctioning key fob. Replacing the battery is a cost-effective solution that can often resolve key fob issues quickly and easily.
