Whether you drive a luxurious ES or a versatile RX, the battery plays a vital role in performance and reliability. Every Lexus has a 12-volt battery that starts the vehicle and powers its electronics, and Lexus hybrid models also have a separate high-voltage hybrid battery. This guide explains the battery types Lexus uses, the warning signs that a battery is failing and what to do about it. Our Longo Lexus team in El Monte, California, is here to help if you need a replacement.
Does Your Lexus Have One Battery or Two?
It depends on the model:
- Gas-powered Lexus models have a 12-volt battery that cranks the engine and runs the lights, infotainment and other electronics.
- Lexus hybrids and plug-in hybrids have two batteries: the high-voltage hybrid battery that helps power the vehicle, and a 12-volt battery that runs the vehicle's systems and gets it started.
- Battery-electric Lexus models use a large high-voltage battery pack for propulsion, along with a 12-volt battery for accessories and systems.
Lexus Battery Types
Lead-Acid Batteries
Lead-acid batteries are the traditional choice for the 12-volt battery in most vehicles, including many Lexus models. They're proven, widely available and effective at delivering the burst of power needed to start an engine.
Nickel-Metal Hydride (NiMH) Batteries
Nickel-metal hydride batteries have long been used for hybrid battery packs, including in earlier Lexus hybrids. They're known for durability in repeated charge and discharge cycles.
Lithium-Ion Batteries
Lithium-ion batteries are lighter and more energy-dense. Toyota uses them in plug-in hybrids and battery-electric vehicles, and some hybrids use them as well. The battery chemistry depends on the model and year, so check your owner's manual or ask our service team about your specific Lexus.
Seven Signs Your Lexus Battery May Be Failing
- Warning lights: A battery or charging system light on the dashboard can signal a problem.
- Slow engine crank: If the engine turns over slowly when you start the car, the 12-volt battery may be weak.
- Electrical issues: Dim headlights, a flickering display or malfunctioning accessories can point to low battery power.
- Battery age: A 12-volt battery typically lasts about three to five years, depending on climate, driving habits and usage, so an older battery is worth testing.
- Corrosion: White or bluish buildup around the terminals can interfere with the connection.
- Rotten egg smell: A sulfur smell can indicate a leaking battery and should be checked right away.
- Swelling or bulging case: A swollen battery case can be a sign of damage or overheating.
If you notice any of these signs, schedule a battery test. Our technicians can check the 12-volt battery and charging system, and for hybrids, the hybrid system as well.
How Long Does a Lexus Battery Last?
A conventional 12-volt battery generally lasts around three to five years, though heat, short trips and frequent use of electronics can shorten that. Hybrid batteries are built to last much longer. Lexus extended its hybrid battery warranty to 10 years or 150,000 miles on 2020 model-year hybrids, with other hybrid components covered for 8 years or 100,000 miles. Coverage varies by model and year, so ask us or see our guide to Lexus warranty coverage for details.
How to Replace a Lexus 12-Volt Battery
Because modern Lexus vehicles have sensitive electronics, and hybrids have high-voltage systems that can be dangerous, we recommend having a professional replace your battery. If you do plan to replace a standard 12-volt battery yourself, check your owner's manual first, since the location and procedure vary by model and some batteries are in the trunk or under the seat. In general, the process looks like this:
- Turn off the vehicle and remove the key or fob.
- Locate the battery and any cover over it.
- Wear gloves and eye protection.
- Disconnect the negative (black) terminal first.
- Disconnect the positive (red) terminal.
- Remove the hold-down bracket and lift out the old battery.
- Clean the tray and terminals.
- Install the new battery that matches your vehicle's specifications.
- Reconnect the positive terminal first, then the negative terminal.
- Start the vehicle and check that the electronics work. Some vehicles may need to relearn settings.
Dispose of the old battery responsibly at a recycling location or let our team handle it for you.
Frequently Asked Questions About Lexus Batteries
How long does a Lexus 12-volt battery last?
A 12-volt battery typically lasts about three to five years, depending on climate, driving habits and usage.
Do Lexus hybrids have two batteries?
Yes. A Lexus hybrid has a high-voltage hybrid battery and a separate 12-volt battery.
What is the warranty on a Lexus hybrid battery?
Lexus extended the hybrid battery warranty to 10 years or 150,000 miles on 2020 model-year hybrids. Coverage varies by model and year, so check your Warranty and Services Guide or ask our team.
Should I replace my Lexus battery myself?
We recommend professional service, especially for hybrid and electric models. The procedure varies by vehicle, and high-voltage systems can be dangerous.
Schedule Battery Service at Longo Lexus
If your Lexus is slow to start or you've noticed any warning signs, bring it to our El Monte, California, service center. You can browse Lexus batteries, schedule service online, check service specials or contact our team. Our service department can be reached at 626-377-4814. If it's time for a new vehicle, view our new Lexus inventory.