Ever found yourself staring at your Subaru Forester, frantically pressing the key fob button, only to get absolutely no response? The doors remain stubbornly locked, the lights refuse to flash, and that familiar chirp is nowhere to be heard. It’s a common, frustrating scenario that often strikes at the least convenient moment – perhaps when you’re loaded up for an off-road adventure, or simply rushing out the door. A dead key fob battery can feel like a major setback, but here at FatBoysOffroad, we’re all about empowering you to tackle these minor mechanical hiccups yourself.
You don’t need a trip to the dealership or a pricey service appointment just to fix this. In this comprehensive guide, we’ll walk you through everything you need to know about how to change battery in your Subaru Forester key fob. We’ll cover the tools, the exact steps for various models, and even some pro tips to keep your remote working flawlessly. Get ready to regain control of your Forester with a simple, satisfying DIY fix!
Let’s dive in and get that key fob clicking again.
The Tell-Tale Signs Your Subaru Key Fob Battery is Dying
Before you even think about grabbing a screwdriver, it’s good to confirm that your key fob’s battery is indeed the culprit. Recognizing the symptoms early can save you a lot of headache.
Don’t wait until your Forester’s doors won’t unlock at all.
Intermittent Functionality and Reduced Range
One of the first indicators is when your key fob starts working only sometimes, or you have to be right next to your vehicle for it to respond. This reduced range is a classic sign of a weakening battery.
You might notice you have to press the button multiple times for it to register.
Dashboard Warnings
Newer Subaru Forester models often have a convenient dashboard warning light that illuminates when your key fob battery is low. Pay attention to these alerts; they’re there to help you!
Consult your owner’s manual to identify the specific low battery indicator for your model year.
No Response at All
The most obvious, and most inconvenient, sign is a complete lack of response from your key fob. No locks engaging, no alarm disarming, nothing.
At this point, you’ll likely be using your physical key to get into the car.
Essential Tools and Replacement Battery for Your Forester Key Fob
Gathering your tools beforehand makes the entire process smooth and quick. You won’t need much, and chances are you already have most of these items lying around.
Preparation is key for any successful DIY task.
What You’ll Need
- Small flathead screwdriver or plastic pry tool: This is crucial for carefully opening the key fob casing without causing damage. A guitar pick can also work in a pinch.
- New replacement battery: Most modern Subaru Forester key fobs (2014 onwards) use a CR2032 lithium coin cell battery. Older models might use a CR1632. Always double-check your owner’s manual or visually inspect your current battery before purchasing a new one.
- Clean cloth (optional): For wiping away any dust or grime inside the fob.
A fresh CR2032 battery is readily available at most electronics stores, supermarkets, or online retailers. Make sure it’s a reputable brand for longevity.
Avoid using metal tools if possible, as they can scratch the plastic or short out components.
Step-by-Step Guide: How to Change Battery in Subaru Forester Key Fob (Models 2014-Present)
This is the main event! The process for newer Subaru Forester key fobs is quite straightforward. Follow these steps carefully, and you’ll have your remote working in no time.
This guide specifically addresses how to change battery in your Subaru Forester key fob for models generally from 2014 up to the current generation.
Opening the Key Fob Casing
- Remove the mechanical key: Most modern Subaru fobs have a small release button or switch on the side. Press or slide this, and pull out the emergency mechanical key. This reveals a slot or seam for prying.
- Locate the prying slot: With the mechanical key removed, you’ll see a small notch or seam along the edge of the key fob where the two halves meet.
- Gently pry open the case: Insert your small flathead screwdriver or plastic pry tool into this slot. Twist or gently pry the two halves apart. Work slowly and carefully around the seam to avoid breaking any plastic tabs. You might hear a few clicks as the tabs release.
Take your time with this step; force is the enemy of plastic.
Removing the Old Battery
- Note the battery’s orientation: Before removing the old battery, take a mental picture or note which side (positive or negative) is facing up. The positive (+) side is usually facing you.
- Gently pry out the old battery: The coin cell battery is typically held in place by small metal clips. Use your flathead screwdriver to carefully lift one edge of the battery out of its housing.
Avoid touching the circuit board with your fingers, as oils and static electricity can potentially cause damage.
Installing the New Battery
- Insert the new battery: Place the new CR2032 battery into the housing, ensuring the positive (+) side is facing the correct direction (usually up, matching how the old one was oriented). Slide one edge under the retaining clips first, then press down on the other side until it clicks securely into place.
- Check for a snug fit: The battery should sit firmly in its compartment without wobbling.
Ensure your hands are clean and dry when handling the new battery.
Reassembling Your Key Fob
- Align the two halves: Carefully align the two halves of the key fob casing. Make sure all the buttons and internal components are properly seated.
- Press the halves together: Gently press the two halves together until they snap securely into place all around the seam. You should hear distinct clicks as the tabs re-engage.
- Reinsert the mechanical key: Slide the emergency mechanical key back into its slot until it locks securely.
- Test your key fob: Go to your Forester and test all the functions: lock, unlock, trunk release, and panic button. It should now respond instantly.
If the buttons feel stiff or don’t work, re-open the fob and ensure the internal rubber button pad is correctly aligned.
Subaru Key Fob Battery Replacement for Older Models (Pre-2014)
While the general principle remains the same, older Subaru Forester key fobs might have a slightly different design or battery type.
Always consult your owner’s manual for exact instructions for your specific model year.
Common Differences in Older Fobs
- No removable mechanical key: Some older fobs are a single unit without a separate emergency key. In these cases, look for a small notch or seam directly on the fob’s edge for prying.
- Different battery type: While many still use CR2032, some older models might use a smaller CR1632 or even a CR2025. Always confirm the battery type before you start.
- Screw-held casing: A few older designs might have a small Phillips head screw holding the two halves together. If you see one, remove it first.
The core process of prying, replacing, and reassembling is largely consistent, but be aware of these potential variations.
If in doubt, a quick search for “[Your Subaru Forester Year] key fob battery replacement” on YouTube can often provide visual guidance.
Why a DIY Key Fob Battery Change is a Smart Move
Tackling this task yourself isn’t just about saving money; it’s about empowerment and practicality, especially for off-road enthusiasts.
Being self-reliant is a core value for any adventurer.
Cost Savings
A dealership might charge you for the battery, labor, and a “diagnostic fee” for something that takes minutes. Doing it yourself costs only the price of a battery, which is usually just a few dollars.
That’s more money for fuel, recovery gear, or camping supplies!
Convenience and Time Savings
Instead of scheduling an appointment and driving to a service center, you can perform this repair in your driveway or even at a remote campsite. It takes less than five minutes from start to finish.
This skill is invaluable when you’re far from civilization and need your remote working.
Building DIY Confidence
Successfully completing small tasks like changing your key fob battery builds confidence for larger DIY projects. It’s a great entry point into understanding your vehicle’s components.
Every successful repair makes you a more capable owner.
Troubleshooting Common Key Fob Issues After Battery Replacement
You’ve changed the battery, but your key fob still isn’t working? Don’t panic. Here are a few things to check.
Most issues after a battery swap are simple fixes.
Incorrect Battery Orientation
Double-check that the new battery is inserted with the positive (+) side facing the correct way. This is the most common mistake.
A battery inserted backward will simply not work.
Poor Battery Contact
Ensure the battery is sitting snugly within its clips. Sometimes the metal contacts can be slightly bent or corroded. Gently clean them with a cotton swab and rubbing alcohol, and carefully bend them back for better contact if necessary.
Make sure the clips are firmly pressing against the battery.
Damaged Internal Components
While rare, it’s possible for internal components or the rubber button pad to become dislodged or damaged during the prying process. Re-open the fob and ensure everything is correctly seated.
If you dropped the fob, internal damage is more likely.
Fob Needs Reprogramming
In very rare cases, especially with older or aftermarket fobs, simply replacing the battery might require a quick reprogramming step. Consult your owner’s manual for reprogramming instructions specific to your Subaru Forester model.
Often, simply inserting a new battery is enough, but some vehicles might lose their pairing.
Defective Key Fob
If all else fails, the key fob itself might be faulty. Over time, buttons can wear out, or the internal circuitry can fail. In this scenario, you might need a new key fob from a dealership or a specialized automotive locksmith.
This is usually a last resort after exhausting all other troubleshooting steps.
Pro Tips for Extending Your Subaru Key Fob Battery Life
A little care can go a long way in maximizing the life of your key fob battery and avoiding unexpected dead spots.
Being proactive saves you hassle down the road.
Keep it Away from Extreme Temperatures
Leaving your key fob in direct sunlight on your dashboard or in a freezing car for extended periods can shorten its battery life. Extreme temperatures degrade battery performance.
Store your key fob in a cool, dry place when not in use.
Avoid Constant Pressure on Buttons
If your key fob is constantly being pressed against other items in your pocket or bag, it can drain the battery faster. The signal is being transmitted even if the car isn’t receiving it.
Consider a separate pocket or a protective case for your fob.
Replace with Quality Batteries
Opt for reputable brands when buying replacement batteries. Cheap, generic batteries might be less expensive upfront but often have a shorter lifespan and less reliable performance.
Spend a few extra dollars for a quality lithium coin cell.
Carry a Spare
If you’re heading out on a long road trip or a serious off-road excursion, consider carrying a spare key fob (with a fresh battery) or at least a spare battery. This can be a lifesaver when you’re far from any auto parts store.
Always have a backup plan, especially in remote areas.
Frequently Asked Questions About Your Subaru Forester Key Fob Battery
What kind of battery does a Subaru Forester key fob take?
Most modern Subaru Forester key fobs (generally 2014 and newer) use a CR2032 lithium coin cell battery. Older models might use a CR1632 or CR2025. Always check your owner’s manual or the old battery itself to confirm the exact type.
How long do Subaru key fob batteries last?
Typically, a Subaru key fob battery will last between 2 to 4 years. Usage habits, environmental factors, and battery quality can all affect this lifespan. You’ll usually get a low battery warning on your dashboard or notice reduced range before it completely dies.
Do I need to reprogram my Subaru key fob after changing the battery?
For most modern Subaru Forester models, no. Simply replacing the battery is usually enough, and the key fob will retain its programming. In rare cases, or with very old or aftermarket fobs, a quick reprogramming step might be necessary. Consult your owner’s manual if your fob doesn’t work after battery replacement.
Can I use any CR2032 battery for my key fob?
While technically any CR2032 battery will fit, it’s highly recommended to use a high-quality, reputable brand. Cheaper batteries may not last as long or provide consistent power, leading to premature failure or intermittent key fob performance.
What if my key fob still doesn’t work after I change the battery?
First, double-check the battery’s orientation (+/-). Ensure the battery is making good contact with the terminals. If still no luck, try a different new battery. If the issue persists, your key fob might need reprogramming (check your owner’s manual) or could be faulty itself, requiring a replacement from a dealership or locksmith.
Changing the battery in your Subaru Forester key fob is a simple, empowering DIY task that every owner should feel comfortable tackling. Not only does it save you money and a trip to the dealership, but it also gives you peace of mind, especially when you’re out on the trail or far from home.
Remember, a little preparation and careful execution are all it takes. Keep a spare battery handy, know the signs of a dying fob, and you’ll never be left stranded by a unresponsive remote again. Now that you know how to change battery in your Subaru Forester key fob, you’re one step closer to being fully self-reliant.
Stay safe, stay comfortable, and keep exploring those backroads with FatBoysOffroad!
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