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What kind of issues are typically seen with the battery in the Lexus RX450h?
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3 answers
★ Top Answer
The Lexus RX450H's 12-volt battery can discharge significantly within just 2 days of not being used. Some owners have had to replace the battery every year without knowing the reason behind the constant failures. However, others have had success with visiting dealerships for diagnosis, using an amp meter to locate the drainage source. For instance, one owner found that a faulty amplifier was drawing excessive power, leading to the complete discharge of the 12-volt battery. Specialists suggested replacing the amplifier at a cost exceeding $700. The Lexus Hybrid 400 series is also known for requiring hybrid battery replacements before reaching 30,000 miles, even though these replacements are typically covered under warranty. These issues highlight the shortcomings of the RX450H's charging systems in terms of reliability.
More answers
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Issues with the Lexus rx450h can stem from both the hybrid battery and the 12-volt battery failing.
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I've owned the car for 3 and a half years with no issues, but it suddenly acted up in cold temperatures of -21 degrees Celsius. Following the manual's instructions got the car up and running again smoothly. I'm considering adding a smart battery charger as a permanent solution for this issue. If anyone has any recommendations, please let me know. Thanks!
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