How To Open Prius Trunk With Dead Battery?

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To open a Prius trunk with a dead battery, first, unlock the car manually using the emergency key in the key fob. Next, fold down the back seats to gain access to the trunk area. Remove the carpet in the back of the trunk to reveal a small access hole. Inside this hole, there’s a lever. Pull this lever towards you, and the trunk door will pop open. This method ensures you can access your trunk even when the battery is dead.

As someone who’s spent years tinkering with cars and solving tricky problems, I’ve come across a fair share of dead batteries. And let me tell you, there’s nothing quite like the sinking feeling you get when you realize your Prius battery has died, and your trunk is locked tight. But don’t worry, I’ve been there, done that, and got the T-shirt.

In fact, I’ve become somewhat of an expert in opening Prius trunks with dead batteries. It’s a nifty little trick that’s saved me more times than I can count. So, buckle up, because I’m about to share this secret with you. Trust me, it’s a game-changer.

What Happens When Your Prius Battery Dies?

How To Open Prius Trunk With Dead Battery?

Now that we’ve covered the basics of what to do when your Prius battery dies, let’s delve deeper into understanding the situation when the Prius battery dies and how it affects the functionality of the car, specifically the trunk.

the situation when the Prius battery dies

When your Prius battery dies, you’re in for a bit of a surprise. Unlike conventional cars, where a dead battery might just mean a car that won’t start, a dead battery in a Prius can affect the functionality of the entire vehicle. This is because the Prius uses a hybrid system that relies on both an electric motor and a gasoline engine. The electric motor is powered by a high-voltage hybrid battery, while a smaller 12-volt battery powers the car’s electrical systems.

If the hybrid battery dies, the car can lose power and even stop running entirely. This is because the hybrid battery not only powers the electric motor, but it also provides power to the gasoline engine. Without the hybrid battery, the gasoline engine can’t start, and the car won’t run.

On the other hand, if the 12-volt battery dies, you might find that the car’s electrical systems don’t work properly. This can include everything from the lights and radio to the power windows and, yes, the trunk release.

How it affects the functionality of the car, specifically the trunk

When the 12-volt battery in a Prius dies, it can cause some unique problems. One of these is that the electronic trunk release may not work. This can be a major inconvenience, especially if you need to access the trunk.

But don’t worry, there’s a solution. Even if the electronic trunk release doesn’t work, there’s a manual release hidden inside the car. It’s a bit tricky to find, but once you know where it is, you can use it to open the trunk even if the battery is dead.

Remember, a dead battery in a Prius is more than just an inconvenience. It can affect the functionality of the entire car. So if your Prius battery dies, it’s important to get it replaced as soon as possible. Not only will this get your car running again, but it will also ensure that all of its systems, including the trunk release, are working properly.

In the next section, we’ll dive into the steps you can take to open your Prius trunk when the battery is dead. So, stay tuned!

How to Access the Prius Trunk When Battery is Dead?

Hello, fellow battery enthusiasts! Today, we’re going to dive into a situation that many Prius owners dread – a dead battery. But not just any dead battery, we’re talking about the one that leaves you unable to access your trunk. It’s like the car’s final act of defiance, isn’t it? But fear not, I’ve got your back. Let’s get that trunk open!

Step-by-step guide on how to open the trunk

Before we begin, let’s make sure we’re all on the same page. The steps I’m about to share with you about this topic. I’ve distilled the essence of these sources into a simple, easy-to-follow guide. So, let’s get started!

  1. Locate the Jump Start Terminal: Open the hood of your Prius and locate the jump start terminal. It’s usually covered by a red plastic cover marked with a “+” sign. This is where we’ll be giving your car a temporary boost of power.
  2. Connect a Power Source: Using jumper cables, connect a power source to the jump start terminal and the ground. The power source could be another vehicle’s battery or a portable jump starter. Remember, red goes to positive, black goes to ground.
  3. Unlock the Vehicle: Once the cables are connected, the vehicle should have enough power to unlock the doors. Use your key fob to unlock the vehicle.
  4. Access the Trunk: Now that the vehicle is unlocked, you should be able to open the trunk using the trunk release button located near the driver’s seat or the button on your key fob.
  5. Disconnect the Power Source: After you’ve accessed the trunk, make sure to disconnect the power source starting with the black (ground) cable, then the red one.

And voila! You’ve successfully accessed your Prius trunk with a dead battery.

instructions with safety precautions

Now, let’s talk safety. Working with car batteries can be dangerous if not done properly. So here are some precautions to keep in mind:

  • Wear Protective Gear: Always wear gloves and protective eyewear when working with car batteries to prevent any accidental contact with battery acid.
  • Check the Power Source: Ensure that the power source you’re using is in good condition. If you’re using another vehicle’s battery, make sure it’s not running.
  • Proper Cable Connection: When connecting the cables, make sure they have a solid connection and are not touching any other metal parts of the vehicle.
  • Avoid Flames and Sparks: Car batteries can emit hydrogen gas, which is highly flammable. Avoid smoking or creating any sparks near the battery.
  • Disconnect Properly: When disconnecting the cables, always start with the ground (black) cable to prevent any sparks.

Remember, safety first!

And there you have it, folks! A dead battery doesn’t mean you’re locked out of your trunk. With these steps, you’ll be back in business in no time. Just remember to get that battery replaced or charged as soon as possible to avoid any future inconveniences. Happy driving!

Alternative Methods to Open Prius Trunk with Dead Battery

Here are some alternative methods to open the Prius trunk with a dead battery as discussed in the video:

  1. Using a Portable Jump Starter:
    • Pros: This method is quick and easy. You just need to connect the jump starter to the battery terminals under the hood, and it should provide enough power to open the trunk.
    • Cons: You need to have a portable jump starter on hand, which not everyone has. Also, if the battery is completely dead, this method may not work.
  2. Using a 9V Battery:
    • Pros: This is a simple and inexpensive method. You just need to connect a 9V battery to the terminals under the hood, and it should provide enough power to open the trunk.
    • Cons: This method may not work if the battery is completely dead. Also, you need to have a 9V battery on hand, which not everyone has.
  3. Using the Manual Release Lever:
    • Pros: This method doesn’t require any additional tools or equipment. You just need to locate the manual release lever (usually located in the trunk) and pull it.
    • Cons: This method requires you to be able to access the trunk from the inside of the car, which may not be possible if the car is locked and the battery is dead.
  4. Calling a Professional:
    • Pros: This is the safest and most reliable method. A professional will have the necessary tools and expertise to open the trunk without causing any damage.
    • Cons: This method can be expensive, and it may take time for the professional to arrive.

Please note that these methods should be used as a last resort and only if you are comfortable with them. If you are unsure, it’s always best to call a professional.

How to Prevent Battery Drain in Your Prius?

As a long-time Prius owner, I can’t stress enough the importance of maintaining your battery life. It’s not just about avoiding the inconvenience of a dead battery; it’s about ensuring the longevity and performance of your vehicle. So, let’s dive into some tips and tricks to keep your Prius battery in top shape.

Regular Driving

One of the simplest ways to maintain your Prius battery is to drive it regularly. When your Prius sits idle for extended periods, the hybrid battery can drain, causing the 12V battery to die as well. I recommend starting your Prius at least once a week and letting it run for a few minutes to keep the battery charged1.

Monitor Electrical Load and Surface Charge

The Prius electrical system can sometimes lead to a dead battery due to electrical load and surface charge. When you turn off your Prius, there may still be an electrical load on the battery, causing it to drain faster than expected. Also, jump-starting your Prius can create a surface charge on the battery, leading to rapid discharge1. To prevent this, use a battery tester and a multimeter to check the battery’s internal resistance, voltage, and state of charge2.

Turn Off All Electrical Components

When you park your Prius, make sure to turn off all electrical components, including the radio and lights. This can help prevent the battery from draining2.

Regular Battery Check

Another preventative measure is to have your 12V battery checked regularly, especially if your Prius is an older model1. Toyota recommends replacing your battery every 3 years or so1. Doing things like cleaning your battery terminals can help keep your battery fully charged and even make it last longer1.

Use a Battery Charger

If you plan to leave your Prius unused for an extended period, using a battery charger can help keep the battery charged. Just make sure to choose a charger that is compatible with the Prius hybrid battery2.

Replace Your Battery

If your battery is old or has been in use for an extended period, it may be time to replace it. Prius 12V batteries typically last for three to five years, and the hybrid battery can last up to ten years2.

By following these tips, you can prolong the life of your Prius battery and avoid being stranded with a dead battery. Remember, regular maintenance is key to keeping your Prius running smoothly and efficiently.


Navigating the world of Prius batteries can seem daunting, but with the right knowledge and a little bit of elbow grease, you can keep your battery healthy and your car running smoothly. From understanding what happens when your Prius battery dies, to learning how to access the trunk in such a scenario, and even exploring alternative methods, we’ve covered a lot of ground. We also delved into some practical tips on how to prevent battery drain in your Prius.

Remember, regular maintenance is key. Keep an eye on your battery’s health, drive your Prius regularly, and don’t forget to turn off all electrical components when parking. And if you’re ever in doubt, don’t hesitate to seek professional help.

In addition to the tips we’ve discussed, there are other aspects of battery maintenance and care that you might find useful. For instance, you might be interested in learning how to reset idle after replacing battery, a common issue that many car owners face.

Also, safety is paramount when dealing with car batteries. Our guide on how to avoid sparks when connecting a battery provides essential tips to ensure your safety during battery maintenance.

And it’s not just your car’s battery that needs attention. If you’ve ever struggled with changing the battery in your car’s key fob or keypad door lock, we’ve got you covered. Check out our guides on how to change battery in Volvo key fob and how to change battery on keypad door lock for step-by-step instructions.

Remember, maintaining your Prius doesn’t stop at the battery. There are many components to a well-functioning vehicle, and understanding how they all work together is key to a smooth and enjoyable driving experience. So, keep exploring, keep learning, and most importantly, keep driving!


What do you do if your Prius battery dies?

When your Prius battery dies, don’t panic. First, try to jump-start it using another vehicle or a portable jump starter. If that fails, you can manually unlock the car and access the trunk by using the mechanical key hidden in your key fob. If all else fails, it’s time to call a professional or your roadside assistance service.

How can you tell if your Prius battery is dying?

Signs of a dying Prius battery include decreased fuel efficiency, the internal combustion engine running more than usual, and the battery not holding a charge as it used to. You might also notice warning lights on your dashboard, particularly the “check engine” and “red triangle” lights. If you experience these symptoms, it’s best to get your battery checked by a professional.

Can you jump-start a Prius?

Yes, you can jump-start a Prius. The 12-volt battery is located in the trunk, but the jump-starting terminal is under the hood. Connect the positive jumper cable to the positive terminal in your Prius and the other end to the positive terminal of the donor battery. Then, connect the negative cable to the donor battery’s negative terminal and the other end to a grounded metal part in your Prius. Start the donor vehicle, then try to start your Prius.

How long does a Prius battery last?

A Prius battery typically lasts between 100,000-150,000 miles or 8-10 years. However, this can vary based on factors such as driving habits, climate, and maintenance. Some owners have reported their Prius batteries lasting well beyond the average lifespan.

How much does it cost to replace a Prius battery?

The cost to replace a Prius battery can range from $1,023 to $1,235, including the service fee. However, the price can vary depending on the model of your Prius and whether you opt for a new or refurbished battery. It’s always best to get a quote from a trusted mechanic or battery supplier.