Is your 2018 Subaru key fob acting up? Don’t worry, you’re not alone. One of the most common culprits for a malfunctioning key fob is a dead battery. The good news is that replacing the battery in your 2018 Subaru key fob is a straightforward process you can easily handle yourself, saving you time and a trip to the dealership. This guide will walk you through each step, ensuring you can quickly get your key fob back in working order.
Identifying Your 2018 Subaru Key Fob Type and Battery
Subaru utilizes different key fob designs depending on the model year and trim. For the 2018 Subaru lineup, which includes models like the Subaru Impreza, Subaru Crosstrek, Subaru Forester, Subaru Outback, and Subaru Ascent, you’ll likely encounter one of two main key fob styles:
-
The Bulging Rectangle Shape: This is a common design for many newer Subaru models, including some 2018 models. This fob is characterized by its rectangular shape with a noticeable bulge and typically uses a CR2032 battery.
-
The Teardrop Shape: While less common for 2018 models, some earlier 2018 Subaru vehicles might still use the teardrop-shaped fob. This older design is more rounded and uses a CR2025 battery.
To determine which type of 2018 Subaru key fob you have and confirm the correct battery, the best resource is your owner’s manual. Alternatively, visually inspect your key fob and compare it to the descriptions below. Knowing your fob type ensures you purchase the correct replacement battery and follow the precise steps for your model.
Step-by-Step Guide to Replacing the Battery in Your 2018 Subaru Bulging Rectangle Key Fob (CR2032 Battery)
If your 2018 Subaru key fob is the bulging rectangle type, you’ll need a CR2032 battery. These batteries are widely available at drugstores, supermarkets, and online retailers. Here’s how to replace the battery:
-
Remove the Emergency Key: Locate the small silver tab on the back of your 2018 Subaru key fob. Press and hold this tab to release and remove the metal emergency key. This key is a backup to manually unlock your car door if the key fob is completely dead.
-
Pry Open the Key Fob: After removing the emergency key, you’ll notice a seam running along the edge of the key fob. This is where you need to carefully pry it open. You can use your fingernail or a small flathead screwdriver. Insert the screwdriver or your fingernail into the seam and gently twist or pry to separate the two halves of the fob. Be patient and avoid applying excessive force to prevent damage to the casing.
-
Locate the Battery: Once the fob is open, you’ll see the internal components, including the transmitter circuit board and the round, flat key fob battery. The battery might be positioned either above or below the circuit board depending on how the fob halves separated.
-
Replace the CR2032 Battery: Carefully release the old CR2032 battery. It might be held in place by small clips. Gently push aside the clips to remove the battery. Take note of the battery’s orientation – specifically which side is facing up (+ side). Now, take your new CR2032 battery and insert it into the compartment, ensuring the correct side (usually the positive side marked with a “+”) is facing upwards, matching the orientation of the old battery. Minimize touching the flat surfaces of the new battery with your fingers; handling it by the edges is recommended to avoid transferring oils that could reduce battery life.
-
Reassemble the Key Fob: Carefully align the two halves of the 2018 Subaru key fob and snap them back together. You should hear a click or feel them securely fastening. Re-insert the metal emergency key until it clicks into place.
Step-by-Step Guide to Replacing the Battery in Your 2018 Subaru Teardrop Key Fob (CR2025 Battery)
If your 2018 Subaru uses the teardrop-shaped key fob, the process is very similar. The main difference is that this fob uses a CR2025 battery and lacks the removable emergency key. Here’s how to replace the battery:
-
Pry Open the Key Fob: Locate the seam on the teardrop-shaped fob. Use your fingernail or a small flathead screwdriver to carefully pry open the two halves of the fob, similar to step 2 in the rectangular fob instructions.
-
Locate and Replace the CR2025 Battery: Once open, locate the CR2025 battery. Remove the old battery and replace it with a new CR2025, ensuring correct polarity (+ side up).
-
Reassemble the Key Fob: Snap the two halves of the teardrop key fob back together securely.
Troubleshooting and When to Seek Professional Help
After replacing the battery, your 2018 Subaru key fob should ideally function immediately. If you’re still experiencing issues, consider these troubleshooting steps:
- Double-Check Battery Polarity: Ensure the new battery is installed with the correct polarity (+ side facing up).
- Try a New Battery: Although rare, a new battery could be defective. Try another new CR2032 or CR2025 battery to rule out a faulty battery.
- Clean Battery Contacts: Inspect the metal contacts in the key fob battery compartment for any dirt or corrosion. Gently clean them with a cotton swab and a bit of rubbing alcohol if necessary.
If these steps don’t resolve the problem, there might be a more complex issue with your 2018 Subaru key fob, such as transmitter malfunction or programming problems. In such cases, it’s best to consult with a Subaru dealership or a qualified automotive locksmith.
Programming Your 2018 Subaru Key Fob (If Necessary)
In most cases, replacing the battery in your 2018 Subaru key fob will not require reprogramming. However, if you find that your key fob still doesn’t work after a battery replacement, or if you’ve replaced the entire key fob, you might need to program it.
While some older Subaru models had DIY programming methods, programming a 2018 Subaru key fob typically requires specialized equipment and is best done at a Subaru dealership. Dealerships have the necessary tools to sync your new key fob with your vehicle’s security system.
For a 2018 Subaru key fob programming, it is highly recommended to schedule a service appointment with your local Subaru dealer. They can ensure the programming is done correctly and securely. Contact your trusted Subaru service center for assistance with key fob programming or any other key fob related issues.
Replacing your 2018 Subaru key fob battery is a simple maintenance task that can save you inconvenience and money. By following these steps, you can confidently restore your key fob’s functionality and get back on the road.
