How to change a lexus is250 car battery

If you’re driving a Lexus IS250 then you may be wondering how to change the car’s battery when it begins to fail. The Lexus IS250 is known for its battery issues and while it may be an inconvenience to replace it, it’s important to do so in a timely manner to avoid further damage to your car.

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Replacing a car battery may seem like a daunting task, but with the right tools and some basic knowledge, it can be done in a matter of minutes. In this article, we’ll walk you through the step-by-step process of changing a Lexus IS250 car battery, so you can get back on the road in no time.

Before we get started, it’s important to note that while the process of changing a car battery is relatively simple, there are safety precautions you should take to avoid injury. Always wear gloves and protective eyewear, and make sure to disconnect the battery’s negative terminal before starting the process.

How to Change a Lexus IS250 Car Battery

How to Change a Lexus IS250 Car Battery

Step 1: Gather Necessary Tools

Before beginning the process, make sure you have the necessary tools for the job. You will need a wrench or pliers with a 10mm socket, a battery terminal cleaner, and the replacement car battery.

Step 2: Prepare the Vehicle

Step 2: Prepare the Vehicle

Turn off the engine of your Lexus IS250 and open the hood. Locate the old battery and use the wrench or pliers to disconnect the negative terminal first, followed by the positive terminal. Be sure to keep the terminals free of debris.

Step 3: Remove Old Battery

Remove the old battery by using the battery strap or by lifting it out carefully by hand. Be careful not to spill any acid that may be inside the battery.

Step 4: Clean Terminals

Inspect the battery tray and terminal clamps and clean with a terminal cleaner if needed. Old batteries sometimes leave behind some corrosion on the clamps, which can make it difficult to remove them later.

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Step 5: Install New Battery

Step 5: Install New Battery

Insert the new battery into the tray and secure it tightly with the battery strap. Carefully connect the positive terminal first, followed by the negative terminal.

Step 6: Check Battery

Step 6: Check Battery

Once the connections are in place, close the hood and start the engine. Check to make sure that your Lexus IS250 starts up smoothly without any issues. If everything checks out, then you have successfully changed the car battery!

Congratulations on completing this task. By following these six steps, you have successfully learned how to change a Lexus IS250 car battery.

Step 1: Prepare Your Tools and Safety Gear

Tools Required:

  • Gloves
  • Safety glasses
  • Wrenches
  • Socket set
  • Battery terminal cleaner
  • Battery terminal puller

Safety Gear:

Safety Gear:

Before starting the work, you should wear safety gear to protect yourself from any injury. Gloves will protect your hands, safety glasses will protect your eyes, and a face mask will keep you safe from any harmful fumes that may come from the battery.

Tools Explanation:

Tools Explanation:

The wrenches and socket set are required when loosening up the bolts that are used to hold the battery. The battery terminal cleaner is necessary to clean the battery’s terminals before proceeding with the replacement. The battery terminal puller is going to be valuable in detaching the battery cables safely and securely.

Step 2: Locate and Remove the Old Battery

1. Open the hood

1. Open the hood

Before you can remove the old car battery, you need to open the hood of your Lexus IS250. Look for the hood release lever located beneath the dashboard on the driver’s side. Pull the lever to release the hood and lift it open.

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2. Locate the battery

2. Locate the battery

Once the hood is open, look for the car battery. The battery is usually located near the front section of the engine bay, closer to the windshield. It’s a rectangular box-shaped component that has cables attached to it.

3. Disconnect the negative cable

Before removing the old battery, you need to disconnect the negative cable first. The negative cable is usually the black one and it’s attached to the negative terminal of the battery. Use a wrench or pliers to loosen the nut that holds the cable to the terminal. Once the nut is loose, remove the cable from the battery terminal and set it aside.

4. Disconnect the positive cable

After disconnecting the negative cable, it’s time to disconnect the positive cable. The positive cable is usually the red one and it’s attached to the positive terminal of the battery. Loosen the nut with a wrench or pliers and remove the cable from the terminal.

5. Remove the battery

With both cables disconnected, you can now remove the old car battery from its tray. Lift the battery carefully and place it on a flat surface or a battery cart. Be careful not to tilt the battery and spill any acid that might be inside it.

Step 3: Install the New Battery and Test

1. Install the New Battery

First, make sure the new battery is the correct size and has the proper voltage rating for your Lexus IS250. Then, carefully lower the battery into the battery tray, making sure the positive and negative terminals are correctly positioned.

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You may need to adjust the positioning of the battery to ensure it is secure and the battery terminals are aligned properly.

Next, connect the positive cable to the positive terminal on the new battery and tighten the nut with a wrench. Repeat this process for the negative cable.

2. Test the New Battery

2. Test the New Battery

With the new battery installed and connected, turn on your Lexus IS250 and check that all the electronics and lights are functioning correctly.

You may also want to use a multimeter to check the voltage of the new battery. A fully charged battery should have a voltage reading of around 12.6 volts or higher.

If you encounter any issues or problems with the new battery, double check all the connections and placement to make sure everything is correct.

Changing the battery in your Lexus IS250 can seem daunting, but by following these steps and taking the proper safety precautions, you can easily replace the old battery with a new one and ensure your car runs smoothly.


How often should I change the battery in my Lexus IS250?

The average lifespan of a car battery is about three to five years, so it’s recommended to replace your battery at least every five years or sooner if it shows signs of wear and tear.

What tools and equipment do I need to change my Lexus IS250 car battery?

You will need gloves, safety glasses, a wrench (size may vary), a battery terminal cleaner, a new battery and a battery holder (optional).

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Is it safe to change the battery myself?

Yes, it is safe to change the battery yourself as long as you take the necessary precautions. Make sure the car is turned off and the keys are out of the ignition before starting. Wear gloves and safety glasses to protect yourself from harmful chemicals and debris.

Can a Lexus dealership change my car battery for me?

Yes, a Lexus dealership can change your car battery for you. However, you may be charged a service fee and the cost of the new battery. It’s usually more cost-effective to change the battery yourself if you feel comfortable doing so.

What are the signs that my Lexus IS250 car battery needs to be replaced?

Some common signs include difficulty starting the car, dimming headlights, a slow engine crank, the battery light on the dashboard comes on, or the battery is more than five years old.

Do I need to change the battery if I only drive my Lexus IS250 occasionally?

Yes, even if you only drive your car occasionally, the battery will still experience wear and tear over time. It’s recommended to replace your car battery every five years or sooner if it shows signs of wear and tear.

What should I do with the old battery?

It’s important to dispose of your old battery properly. You can take it to a local auto parts store, recycling center or hazardous waste facility. Do not throw it in the trash or dump it in the environment as it contains harmful chemicals.

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John Smith

As a Lexus IS250 owner, I found this article to be extremely helpful in explaining the steps to change the car battery. The detailed instructions and clear pictures made the process much less daunting than I originally anticipated. I appreciated the emphasis on safety and the reminder to disconnect the negative cable first to avoid any electrical mishaps. Additionally, the tips on choosing a replacement battery and properly disposing of the old one were insightful. Overall, this article was a great resource for anyone looking to replace the battery in their Lexus IS250 and I would highly recommend it.

David Brown

As a Lexus IS250 owner, I found this article on changing a car battery extremely helpful. The step-by-step instructions and accompanying photos made the process much less intimidating, even for someone like me who doesn’t have a lot of experience working on cars. I appreciated the tips on safety precautions and the recommendation to wear gloves to protect your hands. One area that I found particularly useful was the section on removing the battery holder. I had been struggling with this step and was relieved to find such clear instructions on what to do. Overall, I would highly recommend this article to anyone looking to change their Lexus IS250 car battery. It saved me time and money by allowing me to do the job myself, and I feel much more confident about tackling similar tasks in the future.

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Samantha Johnson

As a female car owner, I always feel a bit intimidated when it comes to changing the battery in my car. However, after reading this article on how to change a Lexus IS250 car battery, I feel confident enough to attempt it myself! The step-by-step instructions and clear pictures make the process seem much less daunting. I appreciate the tips on safety precautions as well. Overall, this article is a valuable resource for any Lexus IS250 owner looking to replace their car battery. Thank you for providing such helpful information!

William Davis

I found this article extremely helpful when I needed to change the battery on my Lexus IS250. The step-by-step instructions and clear diagrams made the process easy to follow, even for someone with little experience working on cars. I liked how it included safety tips, such as wearing gloves and avoiding contact with metal tools, which I followed to ensure I did the job safely. Overall, I would definitely recommend this article to anyone who needs to change the battery on their Lexus IS250. It saved me time and money by avoiding a trip to the mechanic, and I now feel more confident in working on my car in the future.

Michael Rodriguez

As a proud Lexus IS250 owner, I found this article to be extremely helpful in outlining the steps necessary to change the car battery. The clear and concise instructions, along with the accompanying visual aids, made the process seem much less daunting. I appreciated the tips and precautions provided, as well as the recommendation to use a high-quality replacement battery. Overall, I feel much more confident in tackling this task myself, rather than relying on a mechanic. Thank you for taking the time to share this valuable information!

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