RX - 2nd Gen (2004-2009) Discussion topics related to the 2004 -2009 RX330, RX350 and RX400H models

2007 rx 350 draining battery

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Old 08-18-23, 04:52 PM
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kennedy759
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Default 2007 rx 350 draining battery

anywhere to start looking for a battery drain?
Old 08-19-23, 06:47 AM
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mandyfig
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How old is the battery? If the car is not used, it is recommended that you put a battery tender to freshen it up. Batteries die early if not charged regularly.
Old 08-19-23, 01:10 PM
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kennedy759
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the battery was 2 years old, so I replaced it under warranty, I think it has been draining the battery for awhile, but not enough to keep it from starting as long as we drove it every couple of days,and the battery was healthy, but when the battery failed it was dead over night. I have a corvette that drains the battery in 2 weeks, so if weather is bad or snowy I put a tender on it. .
Old 08-20-23, 08:12 PM
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01LEXPL
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Start with usual suspects, like bulbs... Ie. one of the three in the trunk/cargo area... easy to miss that, whether you have the cargo cover or not!

I had one that was finicky and would stay on sometimes. I ended up pulling the bulb in favor of one bright one of the whole trunk in the tailgate.
Old 08-21-23, 05:23 AM
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mandyfig
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You might want to check your alternator charging current. It may be your alternator. Good luck.
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