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  • Battery replacement

    What are people using as a battery replacement? The Interstate battery I bought some years ago that fit great is not available.

    Any suggestions?

    Thanks!
    --Joe
    Joe's 1998 M3 Journal

  • #2
    Interstate mtp h6 48 through costco. About $100 bucks after core exchange. 3 year no fuss warranty

    they also have an agm version for $80 bux more

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    • #3
      AGM Interstate from Costco is the best value imo. I like the smaller H6 version over the larger capacity H7.

      If you want to score detail points, get an AGM from BMW. With a wholesale discount they aren't too bad.

      MSportParts | Braymond141

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      • #4
        Originally posted by Braymond141 View Post
        AGM Interstate from Costco is the best value imo. I like the smaller H6 version over the larger capacity H7.

        If you want to score detail points, get an AGM from BMW. With a wholesale discount they aren't too bad.
        Brett- are you aware if AGM still can use the factory vent tube and tract?

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        • #5
          Thank Brett, Stephen. Costco is nearby. I can give them a try. Does both the H6 and H7 fit the battery cavity without issue? Thanks!
          Last edited by JitteryJoe; 07-31-2022, 10:09 PM.
          Joe's 1998 M3 Journal

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          • #6
            My last battery is from 2012 bought at dealer. Still going strong..

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            • #7
              Originally posted by MParallel View Post
              My last battery is from 2012 bought at dealer. Still going strong..
              was that a flooded or AGM?

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              • #8
                Originally posted by JitteryJoe View Post
                Thank Brett, Stephen. Costco is nearby. I can give them a try. Does both the H6 and H7 fit the battery cavity without issue? Thanks!
                Yes, you just use the alternate mount holes the battery tray has.

                MSportParts | Braymond141

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                • #9
                  Thanks everyone!
                  Joe's 1998 M3 Journal

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                  • #10
                    Originally posted by bmwstephen View Post

                    was that a flooded or AGM?
                    'Good 'ol' lead plates battery. I take it that what you mean by "flooded"?

                    BMW doesn't offer any but the old type if you order one by ETK partnumber. Carbio also takes a special vibration proof version (although using any other battery never made any difference), as the cabrio has a special floating, shock-absorbed battery tray that acts as a tuned mass damper. (also prevents the trunk metal from getting eaten away). (E46 cabrio is even fancier with an x, y and z axis shock absorber)

                    kinda like the OEM BMW (re)branded ones.
                    Found the pic from 10 year ago.

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                    • #11
                      I have a OPTIMA Red Top with a BimmerWorld holding tray.

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                      • #12
                        Strange, my pic isn't visible, but does show when I put my post in edit mode.

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                        • #13
                          Originally posted by bmwstephen View Post
                          Interstate mtp h6 48 through costco. About $100 bucks after core exchange. 3 year no fuss warranty

                          they also have an agm version for $80 bux more
                          thank for this options!

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