What kind of battery does a Lexus IS 350 take?
The Lexus IS 350 uses a standard 12-volt automotive battery for starting and powering the car’s electronics. It does not use a high-voltage hybrid battery, which is only found in the IS 350h hybrid variant.
Battery basics for the IS 350
The IS 350 is powered by a 12-volt battery. Depending on the model year and market, Lexus may equip it with either a conventional flooded lead-acid unit or an absorbed glass mat (AGM) 12-volt battery, particularly in newer builds or higher-demand trims that place more load on the electrical system.
Understanding which type your car has requires checking the battery label or the owner's manual, as the correct replacement depends on the exact year and configuration.
Common options you might encounter:
- 12-volt lead-acid battery (the standard option on most IS 350 models)
- 12-volt AGM battery (used in some later years or higher-demand configurations)
Conclusion: For most IS 350 vehicles, a conventional flooded 12V battery will be correct, but newer models or those with higher electrical loads may use AGM. Always verify with the exact specs for your car.
How to verify and replace the battery
Follow these steps to identify the right battery and perform a safe replacement.
- Open the hood and locate the 12-volt battery, typically in the engine bay near the driver’s side or shock tower area.
- Read the label on the battery to confirm the group size (such as 24F, 35, etc.) and the CCA rating. If the label is worn, refer to the owner's manual or Lexus parts catalog for your year and market.
- Purchase a replacement with the same group size and equal or higher CCA; consider AGM if your car requires or specifies it.
- Disconnect the negative (-) terminal first, then the positive (+) terminal. Remove any hold-down bracket and lift the old battery out carefully.
- Clean the tray and terminals, install the new battery, reconnect the positive terminal first, then the negative, and start the car to verify operation.
Note: If you’re unsure about the correct battery or lack tools, a qualified technician or Lexus service center can confirm the exact specifications for your vehicle and replace the battery safely.
Summary
The IS 350 runs on a 12-volt automotive battery, most commonly a conventional flooded lead-acid unit, with AGM variants present on some newer or higher-demand configurations. Always match the replacement to your exact year and market specifications by checking the battery label or consulting your owner's manual. The high-voltage battery is only in the IS 350h hybrid, not in the gasoline IS 350.
How much is a battery for a Lexus IS350?
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Can you replace a Lexus battery yourself?
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Does Lexus require a special battery?
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What battery does Lexus recommend?
Lexus uses different battery types depending on the model: a 12-volt lead-acid battery for gasoline-only vehicles, and a high-voltage nickel-metal hydride (NiMH) battery for hybrid models. Newer models with start-stop technology may use AGM (Absorbed Glass Mat) or EFB (Enhanced Flooded Battery) lead-acid batteries.
Gasoline and hybrid models
- Gasoline Models: Use a standard 12-volt lead-acid battery. Aftermarket options include flooded and AGM types, and some models with start-stop technology may use EFB batteries.
- Hybrid Models: Use a high-voltage nickel-metal hydride (NiMH) battery to assist the gasoline engine, which is separate from the standard 12-volt starting battery.
Battery replacement specifics
- For 12V batteries: It is important to match the group size and specifications (like CCA - Cold Cranking Amps) of the original battery when replacing it, says AutoZone.
- Genuine batteries: Lexus offers genuine replacement batteries that are designed to meet the specific requirements of each model, notes this Lexus video.
Key takeaways
- The type of battery depends on whether the vehicle is a standard gasoline, hybrid, or has start-stop technology.
- For a 12-volt battery replacement, match the original specifications for best performance, according to this Reddit post.
