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The lifespan of the hybrid battery in a 2008 Lexus RX400 is hard to predict as it depends on usage, environment, and maintenance. Lexus provides a 10-year or 100,000-mile warranty for the battery, indicating their confidence in its quality. Initially, it was believed that hybrid batteries would need replacement after 10 years, but many users are surpassing this mark without issues. Some owners have driven over 200,000 miles on the original battery, contradicting earlier expectations. If purchasing a used RX400, it is advisable to have the battery inspected by Lexus to ensure it is functioning properly, considering the high cost of around $5,000 for an OEM replacement.
I have an 08 model with 305,000 miles on it and the original battery is still going strong. I think the hybrid batteries have held up pretty well in my experience.
If the battery dies, is it possible to operate the vehicle without using the hybrid mode?
Hybrid batteries in your 2008 Lexus RX400h have the potential to remain reliable for a span of 10 to 15 years or for up to 150,000 miles before experiencing any issues.
I have a 2007 vehicle that's racked up around 160,000 miles and still has the original battery.