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      07-19-2020, 07:47 PM   #1
kcatbat
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Do I need to vent my new AGM battery?

My OEM battery just crapped out after 11 years. Only 15,000 miles but the heat here in Phoenix kills batteries, so I can't complain. So I decided to replace it myself and with an AGM battery, which I have ordered.

My question is for anyone who has had experience with AGM batteries installed in e46s (this is for an e46 M3 Convertible). What did you learn about venting AGM batteries, and if you've installed one, did you vent it?

Thanks for your help.
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      08-05-2020, 02:55 AM   #2
Kewl X5
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Quote:
Originally Posted by kcatbat View Post
My OEM battery just crapped out after 11 years. Only 15,000 miles but the heat here in Phoenix kills batteries, so I can't complain. So I decided to replace it myself and with an AGM battery, which I have ordered.

My question is for anyone who has had experience with AGM batteries installed in e46s (this is for an e46 M3 Convertible). What did you learn about venting AGM batteries, and if you've installed one, did you vent it?

Thanks for your help.
I vented the AGM battery. Have replaced it once in 5 years.
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