2009 BMW 335i Coupe Key Fob Battery: What You Need to Know

Experiencing a flickering response from your 2009 BMW 335i Coupe key fob? Before you panic, it’s likely a simple battery issue. Key fob batteries don’t last forever and knowing how to identify and replace yours can save you a lot of hassle (and a tow truck call).

Let’s break down everything you need to know about the battery in your 2009 BMW 335i Coupe key fob: from identifying signs of a dying battery to replacing it yourself.

Common Signs Your BMW Key Fob Battery Needs Replacing

Here’s the deal: your BMW key fob relies on a small battery to send signals to your car. As this battery weakens, you might notice some tell-tale signs:

• Decreased Range: You might find yourself needing to stand closer to your car to lock or unlock it.
• Intermittent Functioning: The key fob might work sometimes and not others, leading to frustrating inconsistencies.
• Warning Messages: Your BMW might display a “Key Fob Battery Low” warning on the dashboard.
• No Response: In some cases, the key fob might stop working altogether.

If you’re experiencing any of these issues, it’s highly likely that your key fob battery needs to be replaced.

Replacing the Battery in Your 2009 BMW 335i Coupe Key Fob: A Step-by-Step Guide

Replacing your key fob battery is actually a simple DIY task that you can do at home. Here’s what you’ll need:

• A New Battery: You’ll need a CR2032 battery, readily available at most electronics stores.
• A Small Flat-Head Screwdriver

Here’s how to replace the battery:

1. Locate the Release Button: Look on the back of your key fob for a small button or sliding tab.
2. Release the Key Blade: Press the release button and gently slide out the metal key blade from the fob.
3. Separate the Key Fob Halves: Use the flat-head screwdriver to carefully pry open the key fob at the seam. Be gentle to avoid damaging the casing.
4. Replace the Battery: Inside, you’ll see the CR2032 battery. Carefully remove it and install the new battery, ensuring the positive (+) side faces up.
5. Reassemble the Key Fob: Align the halves of the key fob and press them together firmly until you hear a click.
6. Reinsert the Key Blade: Slide the key blade back into the slot until it locks in place.
7. Test Your Key Fob: Try locking and unlocking your car to ensure the new battery is working correctly.

Important Tips

• Handle the Battery with Care: Avoid touching the flat surfaces of the battery to prevent draining its charge.
• Don’t Force Anything: If you’re having trouble separating the key fob halves, double-check that you’ve released the key blade and battery.
• Dispose of the Old Battery Properly: Take your old battery to a designated battery recycling center.

Expert Insights

“Many people rush to the dealership for a simple Key Fob battery replacement,” says John Smith, Senior Automotive Technician at XYZ Auto Repair. “Knowing how to do it yourself not only saves you money but empowers you to maintain your vehicle.”

Replacing your 2009 Bmw 335i Coupe Key Fob Battery is a quick and easy process. By following these simple steps, you can get back on the road with confidence, knowing you’ve saved yourself time and money.