The Essential Guide to Lexus RX 350 Battery Maintenance

The Essential Guide to Lexus RX 350 Battery Maintenance

The Lexus RX 350 is known for its luxury and reliability, and a significant part of that reliability comes from its battery. The battery in your Lexus RX 350 is the source of power for starting the engine and provides energy to all the electrical components when the engine isn’t running.

Recognizing the Signs of Battery Wear

Like any other car battery, the one in your Lexus RX 350 will wear out over time. Some signs that your battery may need attention include:

  • Slower engine crank: When the battery is dying, you’ll notice that the engine takes longer to start.
  • Check engine light: Sometimes, this light can indicate battery problems.
  • Low battery fluid level: Most batteries have a translucent part of the casing so you can keep an eye on your battery’s fluid level.
  • Swelling or bloating battery case: Extreme temperatures can cause the battery case to swell, reducing battery life.
  • Battery leak: Leaking also causes corrosion around the posts where the + and – cable connections are located.

Choosing the Right Battery for Your RX 350

When it’s time to replace your Lexus RX 350’s battery, you’ll want to choose the right one. The Lexus RX 350 typically uses a Group 35 Battery, which is a common size used in many different vehicles⁴. It’s a mid-sized battery that provides enough power to start the engine in most cars, including the Lexus RX 350⁴.

Installation and Maintenance Tips

Replacing a car battery is a relatively simple task that most people can do at home with a few tools. However, if you’re not comfortable doing it yourself, it’s best to have a professional handle the installation. To maintain your new battery:

  • Keep it clean: Ensure the battery terminals are free from corrosion.
  • Secure it properly: A battery that isn’t securely fastened can vibrate, leading to short circuits and internal damage.
  • Check the charge: Regularly check your battery’s charge, especially if you don’t drive your Lexus RX 350 often.

Cost Considerations

The cost of a new battery for a Lexus RX 350 can vary. You might find prices ranging from around $50 for a remanufactured unit to over $500 for a brand-new, OEM (Original Equipment Manufacturer) battery¹. It’s important to consider both the quality and the warranty when purchasing a new battery.


Your Lexus RX 350’s battery is a crucial component that requires regular attention to ensure your vehicle remains dependable. By understanding the signs of battery wear, choosing the right replacement, and following proper maintenance procedures, you can extend the life of your battery and avoid being stranded due to a dead battery.

This blog has covered the essentials of Lexus RX 350 battery maintenance, including understanding the battery needs, recognizing signs of wear, choosing the right battery, installation, maintenance tips, and cost considerations. Regular maintenance and timely replacement of the battery will keep your Lexus RX 350 running smoothly for years to come.

Post Comment

You May Have Missed