Is your 2007 Audi A4 key fob starting to feel unresponsive? Maybe you have to press the buttons multiple times, or perhaps the range has significantly decreased. It’s a common issue for Audi A4 owners of this era, and the culprit is often a simple dead battery in your key fob. Before you rush to the dealership and potentially spend a significant amount on a replacement or service, you should know that changing the battery in your 2007 Audi A4 key fob is a remarkably easy and inexpensive task you can accomplish yourself in just minutes.
Doing it yourself will save you a considerable amount compared to dealer service, which can range from $80 to $150 just to replace a small battery. For less than $5 and about 5 minutes of your time, you can restore full functionality to your key fob. This guide will walk you through the straightforward process of replacing your 2007 Audi A4 Key Fob Battery, step-by-step. The procedure primarily involves pressing a couple of release tabs, opening the key fob casing, swapping out the old battery with a new one, and snapping the case back together. While the original article mentioned reprogramming, for a simple battery change, this step is often unnecessary for the 2007 Audi A4.
This guide is specifically tailored for the key fob style commonly used with the B7 platform Audi A4, S4, and RS4 models manufactured between 2005.5 and 2008. While other Audi models from this period might utilize a similar key design, and these instructions may still be applicable, we are focusing specifically on the 2007 Audi A4 key fob battery replacement for this article.
What You’ll Need
Before you begin, gather these simple supplies:
- CR2032 Battery: You’ll need one CR2032 battery for each key fob. This is a common coin cell battery readily available online or at most drugstores and electronic stores. Purchasing a multi-pack online can be even more economical, ensuring you have spares for the future or for your backup key fob.
- Small Flat-Head Screwdriver: A small flat-head screwdriver, like those used for eyeglasses repair, is ideal for gently pressing the release tabs on the key fob. If you don’t have a small screwdriver, a pen or even a thin, sturdy piece of plastic might work in a pinch, but exercise caution to avoid scratching or damaging the key fob casing.
Step-by-Step Guide to Replacing Your 2007 Audi A4 Key Fob Battery
Follow these easy steps to replace the battery in your 2007 Audi A4 key fob:
Step 1: Accessing the Key Fob Casing
Locate the first release tab on the side of your 2007 Audi A4 key fob, near where the key blade folds into the fob. Using your small flat-head screwdriver, gently press inward on this tab. You’ll need to apply firm pressure to release the locking mechanism.
Step 2: Opening the Key Fob
Next, find the second release tab. This is located on the bottom edge of the 2007 Audi A4 key fob, opposite the key ring. Press this second tab firmly with your screwdriver. As you press both tabs, the back cover of the key fob should pop open slightly. Once it’s loose, you can usually remove the back cover completely using your fingers.
Step 3: Battery Replacement
With the back cover removed, you’ll see the CR2032 battery. Take note of the battery’s orientation – the positive (+) side should be facing upwards. Gently pry out the old battery. You can use your fingernail or the edge of the screwdriver to carefully lift it out. Install the new CR2032 battery, ensuring the positive (+) side is facing up, matching the original orientation.
Step 4: Reassembling the Key Fob
Once the new battery is in place, simply snap the back cover back onto the key fob. Press firmly until you hear or feel it click securely into place. No tools are needed for reassembly.
Step 5: Testing the Key Fob
After reassembling the key fob, test it by pressing the lock and unlock buttons. You should see the red LED light on the fob illuminate when you press a button, and your 2007 Audi A4 should respond accordingly. In most cases, for a 2007 Audi A4, reprogramming is not required after a simple battery replacement. However, if you find your key fob is still not working correctly, consult the troubleshooting tips below.
Troubleshooting
- No Red Light or Response: If you press the lock or unlock buttons and don’t see the red light on the key fob, double-check that the CR2032 battery is installed correctly with the positive side facing up. If it is, ensure you are using a fresh, new battery. If the issue persists, there might be a different problem with your key fob, such as water damage or internal component failure. In such cases, consider trying your spare key fob or consulting a professional.
- Red Light but No Door Response: If the red light illuminates when you press buttons, but your Audi A4 doesn’t respond (doors don’t lock/unlock), you might need to resynchronize or reprogram your key fob to your car. While not always necessary for a 2007 Audi A4 battery change, if needed, consult your owner’s manual for specific key reprogramming instructions for your model. Online resources and Audi forums can also provide model-specific guidance on key fob reprogramming if it becomes necessary.
Replacing the battery in your 2007 Audi A4 key fob is a quick, easy, and cost-effective DIY task. By following these simple steps, you can avoid unnecessary dealership costs and ensure your key fob is functioning reliably once again.
