# 2005 Lexus ES 330 battery has fully drained 3x since alternator change

**URL:** <https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181>\
**Category:** Maintenance/Repairs\
**Tags:** es330, lexus\
**Created:** [April 16, 2021, 2:35pm UTC](https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181 "2021-04-16T14:35:11Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![ladla84](https://avatars.discourse-cdn.com/v4/letter/l/ecb155/32.png) [@ladla84](https://community.cartalk.com/u/ladla84)\
**Post date:** [April 16, 2021, 2:35pm UTC](https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181/1 "2021-04-16T14:35:11Z")

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The alternator on my 330ES 2005 Lexus (68,432mi) was replaced in 2016. My car battery has been completely drained three times now? I’ve replaced the battery twice in the last two years. I don’t want to replace it again without having some diagnostic work performed on the car. The dealer is too expensive.

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [April 16, 2021, 3:51pm UTC](https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181/2 "2021-04-16T15:51:06Z")

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Then have it diagnosed elsewhere, no need to take a 16 year old vehicle to a dealership. **If** there is no parasitic draw might be best to replace **both** the alternator and battery at the same time.

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [April 16, 2021, 4:58pm UTC](https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181/3 "2021-04-16T16:58:06Z")

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> [@ladla84](#):
>
> The dealer is too expensive.

A battery from the Lexus dealer is $140 and comes with a 2 year free replacement warranty.

It is common for batteries to discharge if the vehicle is used infrequently, the battery can be recharged. To avoid having a discharged battery buy and use a battery tender.

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<div class="post-metadata">

**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [April 16, 2021, 7:18pm UTC](https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181/4 "2021-04-16T19:18:42Z")

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I think the OP meant diagnostic fee is too high at a dealership.

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [April 17, 2021, 8:40pm UTC](https://community.cartalk.com/t/2005-lexus-es-330-battery-has-fully-drained-3x-since-alternator-change/176181/5 "2021-04-17T20:40:01Z")

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go to autozone they will test the battery {dead cells} and alternator for free. at least you can rule them out. they can check for any codes too, that might not have set off your check engine light yet. also at night make sure there arent any lights staying on that you might not see in the day.{ glove box or under hood}