Is your 2008 Lexus IS250 key fob not working? A dead battery is the most frequent culprit. Luckily, replacing the battery in your Lexus IS250 key fob is a simple and inexpensive task you can easily do yourself. This guide will provide you with all the information you need about the correct battery size for your 2008 Lexus IS250 key fob, how to replace it, and some troubleshooting tips.
The 2008 Lexus IS250 key fob typically uses either a CR1632 or a CR2032 battery. To ensure you purchase the correct replacement, it’s always best to check your owner’s manual or to open your key fob and visually identify the existing battery before buying a new one. Both CR1632 and CR2032 batteries are widely available online and at most stores that sell batteries. They are also quite affordable, usually costing less than $6.
Replacing your Lexus IS250 key fob battery is a straightforward process. Here’s a step-by-step guide to help you:
For newer 2008 Lexus IS250 key fobs:
- Locate the hidden key within your key fob.
- Remove the hidden key by sliding or pressing the release mechanism, depending on your specific fob design.
- Once the key is removed, you will see a designated slot where the key was housed.
- Insert the hidden key into this slot. This will act as a lever to open the key fob casing.
- Gently twist or pry the key to separate the two halves of the key fob.
For older 2008 Lexus IS250 key fobs:
- Inspect the key fob casing for a small notch or seam.
- Use a thin, flat object, such as a small flathead screwdriver or a plastic pry tool.
- Carefully insert the flat object into the notch or seam.
- Gently pry along the seam to separate the two halves of the key fob casing. Be patient and avoid applying excessive force to prevent damage.
Once you have opened the key fob casing (for both newer and older models):
- Carefully lift the circuit board if necessary to access the battery compartment. In some models, the battery is directly visible once opened.
- Take note of the battery’s orientation before removing it. Observe which side is facing up (+) and which side is facing down (-). This will ensure you install the new battery correctly.
- Remove the old battery. You may be able to gently pry it out with your fingertip or the same flat object you used to open the case.
- Install the new CR1632 or CR2032 battery, ensuring the correct orientation (+ and – sides match the original battery placement).
- Carefully reassemble the key fob casing, pressing both halves firmly together until they snap closed.
- Test your key fob by pressing the buttons to lock, unlock, or activate other functions of your Lexus IS250.
If your key fob still doesn’t work after replacing the battery, here are a few troubleshooting steps:
- Check Battery Contacts: Ensure the battery contacts inside the key fob are clean and making good contact with the new battery. You can gently clean the contacts with a cotton swab and a bit of rubbing alcohol if needed.
- Battery Orientation: Double-check that you have installed the new battery with the correct polarity (+ and – sides in the right direction).
- New Battery Charge: Although new batteries are generally charged, it’s possible you may have gotten a dud. Try a different new battery to rule out a faulty battery.
If you’ve tried these steps and your 2008 Lexus IS250 key fob still isn’t functioning, the issue might not be the battery. It’s possible there’s a problem with the key fob itself, or with your vehicle’s receiver.
To further assist you, we have a range of video guides on our YouTube page that can provide visual step-by-step instructions for various key fob battery replacements, including Lexus models. While we may not have a video specifically for your 2008 Lexus IS250 key fob, you can likely find a video demonstrating a similar type of key fob which will be helpful.
Understanding the type of key fob you have can also be helpful in troubleshooting or when considering a replacement. Here are the five common types of key fobs:
- Standard Remotes: Basic remotes with only lock, unlock, and sometimes panic buttons.
- Flip Keys: Keys attached to the remote that flip out, similar to a switchblade.
- Remote Heads: Keys are directly attached and extend out from the remote, they do not retract.
- Fobik Keys: The key is hidden inside the remote, but it is a separate piece and not connected to the fob itself.
- Smart Keys: Often associated with push-to-start ignition systems, offering features like proximity unlocking and remote start in some cases.
If replacing the battery doesn’t solve your 2008 Lexus IS250 key fob issue, and you suspect a more significant problem, you might need to consider a complete key fob replacement. While battery replacement is a DIY fix, key fob replacement or reprogramming may require professional assistance.
