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LittleMonster_III > I have the Autocraft battery. Can't vouch for the Braille Battery with or Macht Schnell hold down -- never used either. You don't really need an extra hold down or aftermarket one -- the 135i's is reused. Battery is solid as a rock.
I was never able to get an answer on the OEM battery -- not even from BMW NA. The Autocraft has been working perfectly, so that's what I would go with.
Don't forget to get the battery coded.
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