Hey guys! So, you're here because your 2020 Subaru Crosstrek key fob is acting up, right? Maybe it's not unlocking your doors, or perhaps the range is seriously diminished. Well, chances are, the battery is on its last legs. Don't worry; it's a super common issue, and the good news is, replacing the key fob battery in your Crosstrek is a pretty straightforward process. This guide will walk you through everything you need to know, from identifying the problem to selecting the right battery and performing the replacement. We'll cover everything from the tools you'll need to the specific steps, ensuring you can get your key fob working like new again in no time. This is your go-to resource for a quick and easy fix.

Before we dive in, let's make sure we're on the same page. This guide specifically focuses on the 2020 Subaru Crosstrek. While the general process might be similar for other model years, there could be slight differences in the key fob design or the battery type. Always double-check your owner's manual if you're unsure. Now, let's get started. First off, why is it important to address a dying key fob battery? Well, it's more than just a minor inconvenience. A malfunctioning key fob can disrupt your daily routine, leading to frustration and potential delays. Imagine fumbling with a traditional key in the rain or being locked out of your car altogether. Moreover, a weak battery can affect the performance of other key fob functions, such as remote start, if your Crosstrek is equipped with it. Regular maintenance, including battery replacement, ensures your key fob remains a reliable and convenient tool. So, let's get you prepared to tackle this simple fix. We'll go over everything from the tools needed to the step-by-step instructions. Stay tuned!

Identifying the Need for a New Battery

Okay, before you start tearing your key fob apart, how do you even know if the battery is dead or dying? There are several telltale signs that will tip you off. First and foremost, the most obvious is a diminished range. If you find yourself having to stand right next to your Crosstrek to unlock the doors, that's a huge red flag. Secondly, if the key fob fails to work consistently, that's another indicator. Sometimes it works, sometimes it doesn't. This inconsistency points to a weakening battery. Thirdly, the key fob might not respond at all. You press the buttons, and nothing happens. This could be due to a completely drained battery or another issue, but the battery is always the first suspect.

Also, your Crosstrek might give you some hints. Some models have a low battery warning light on the dashboard that illuminates when the key fob battery is running low. Pay attention to those warnings! Additionally, some Subaru vehicles, including the 2020 Crosstrek, may display a message on the multi-information display indicating a low key fob battery. If you see this, don't ignore it. The sooner you replace the battery, the better. And, hey, even if you don't notice any of these signs, it's a good idea to replace the battery every year or two as part of your regular maintenance routine. Doing so prevents unexpected failures and ensures your key fob remains reliable. It is also good practice to test the key fob regularly, especially before long trips. The last thing you want is to be stranded with a dead battery. Now, let's move on to the fun part – getting your hands dirty and replacing that battery!

Tools and Materials You'll Need

Alright, let's gather the troops! Replacing the key fob battery in your 2020 Subaru Crosstrek is a breeze, but you'll need a few essential items. Fortunately, you probably have most of these lying around the house. First and foremost, you'll need a replacement battery. For the 2020 Crosstrek key fob, it's a CR2032 lithium coin cell battery. These are readily available at most stores, including auto parts stores, drugstores, and even online retailers. Make sure you grab a reputable brand to ensure longevity. Also, a small Phillips head screwdriver will be required to open the key fob casing. The size is usually pretty small, so having a set of precision screwdrivers can be helpful.

You'll also need a small, flat-head tool or a pry tool. This will assist you in separating the key fob halves. A thin, non-marring tool, like a plastic spudger or even a guitar pick, works best to avoid scratching the plastic. Be careful and gentle when prying the case open. Another option is a small piece of tape such as electrical tape or masking tape. This is optional, but it is useful to prevent the metal battery from accidentally short-circuiting. Ensure the tape isn't too adhesive to avoid leaving residue. Lastly, a clean, dry work surface is always a good idea. This prevents losing small parts and makes the process cleaner and more organized. Ensure you have good lighting to see the details clearly. Okay, you have your tools, let's get ready for the grand finale – the battery replacement process!

Step-by-Step Guide to Replacing the Battery

Okay, guys, it's showtime! Replacing the battery in your 2020 Subaru Crosstrek key fob is a piece of cake. Follow these steps, and you'll be done in minutes. First, locate the key fob's release button or slot. On most Crosstrek key fobs, there's a small button or a slot on the side. Press this button or insert something small into the slot to release the physical key. This is your first step. Second, use your Phillips head screwdriver to remove the small screw, this is usually found under the physical key or on the back of the key fob. Once the screw is out, you can start the process of opening the case. Next, use your flat-head tool to gently pry the key fob halves apart. Insert the tool into the seam and carefully work your way around the edges. Be patient and apply gentle pressure until the case separates.

Once the key fob case is open, you will see the battery. Carefully remove the old battery. Note the orientation of the battery before you remove it. Many key fobs have a small diagram showing the correct polarity. Use a non-metallic tool to avoid short-circuiting any components. Ensure your new battery is of the correct type (CR2032). Insert the new battery into the key fob, making sure the positive (+) side faces the correct way. Align the two halves of the key fob case and carefully snap them back together. Ensure the case is securely closed. Reinstall the screw that you removed in step 2. Give the key fob a test to confirm it works. Press the lock and unlock buttons and test the remote start if you have it. If everything works, congratulations! You've successfully replaced your key fob battery. If it doesn't work, double-check the battery orientation and make sure the case is completely closed and the screw is tight. If it still doesn't work, the new battery might be defective. Try another new battery.

Troubleshooting Common Issues

Okay, so you've replaced the battery, but your key fob still isn't working? Don't panic! Here are a few troubleshooting tips to help you get back on track. First, the most common issue is incorrect battery orientation. Double-check that the positive (+) side of the battery is facing the right direction. It's an easy mistake to make, so always double-check. Second, make sure that the key fob case is completely closed. If the case isn't properly sealed, the electrical contacts may not connect. Carefully snap the case back together and ensure it's securely closed. Also, check the battery contacts for corrosion. If there's any visible corrosion, gently clean the contacts with a cotton swab dipped in isopropyl alcohol. Be careful not to damage the contacts.

Another thing to check is the new battery itself. It's rare, but sometimes a new battery can be defective. Try replacing the battery with a different one. You might also want to re-synchronize the key fob with your Crosstrek. This is rare, but it can happen after a battery change. To do this, sit in the driver's seat, close all doors, and then use the key fob to lock and unlock the doors. If none of these steps work, there might be a more serious issue, and it's time to consult a professional. But, in most cases, these troubleshooting tips will get you back on the road in no time. If you run into any other problems, remember to consult your owner's manual or a qualified technician for further assistance. Keep calm, and keep troubleshooting. You got this!

Battery Life and Replacement Frequency

Alright, let's talk about how long your new battery will last and when you'll need to do this again. The battery life in your 2020 Subaru Crosstrek key fob typically ranges from one to three years. Several factors can affect battery life, including usage and environmental conditions. If you use your key fob frequently, such as for remote start or unlocking the doors multiple times a day, the battery will likely drain faster. The same is true if you live in a climate with extreme temperatures. Cold weather, in particular, can reduce the battery's lifespan.

As mentioned earlier, a good rule of thumb is to replace the battery every one to two years, even if it seems to be working fine. This proactive approach prevents unexpected failures and keeps you from getting locked out of your car. Pay attention to those early warning signs, such as diminished range and inconsistent performance. If you notice any of these signs, don't wait to replace the battery. Keeping spare batteries on hand is also a smart move. That way, you'll be prepared for a quick replacement whenever it's needed. You can buy batteries in bulk to save money. Remember, proper maintenance and timely battery replacement ensure your key fob remains a reliable and convenient tool. So, with a little care and attention, you can keep your key fob working for years to come. Now you are good to go.