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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Fri, Jul-21-2017, 06:01:19 PM   #11
omairtheman1
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Default Re: Battery...?

How much is an OE BMW battery now a days?
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Old Fri, Jul-21-2017, 06:26:49 PM   #12
wgknestrick
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Default Re: Battery...?

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Originally Posted by Double E View Post
Sort of still on topic...how is it that my car can have an Optima AGM battery installed, the battery performs well and I get great life from it, yet it requires a special float charging device other than the ones we've been using for years?

The car is the same and the battery performs fine...so why is the a/c powered charger required to be any different?
They can still be charged conventionally, but you could be negatively affecting the life (depending on the charger). Optima's branded charger is one of the best chargers out there though and about $90. It's amazing what batteries it can bring back from the dead with it's programmable charging / conditioning to remove Sulfides from the plates.
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Old Sat, Jul-22-2017, 05:53:34 PM   #13
Jrrrrrrr
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Default Re: Battery...?

The smart thing to do is just buy whichever battery has the best warranty and is made by a reputable OEM. That is unless you have special concerns like weight savings, deep cycle, etc.

After the BMW-branded exide battery in my car died in 2015 after 6 years of life, I went with an Everstart Maxx-H6 from Walmart. The Everstart is made by Johnson Controls, fits well in the e36 battery recess, has a 3-year replacement, 5-year prorated warranty, and is pretty cheap at like $125. Admittedly, the first one I got failed after about 4 months, but the free replacement has been going strong for nearly 2 years.

I looked into the Diehard platinum, BMW-rebrands, and Interstate MTP-series batteries as well, but the Walmart-special had a better warranty and cost less than those other options.
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Old Sat, Jul-22-2017, 08:51:38 PM   #14
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Default Re: Battery...?

I think I'm going to go the Optima Red Top with Bimmerworld mounting bracket route. Better battery, a little weight savings, sounds like a win-win.
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Old Sat, Jul-22-2017, 09:06:41 PM   #15
englishtom1596q
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Default Re: Battery...?

If you do interstate batteries you can call the local distributors and asked for a blemish battery. They're ones that the tag got messed up etc and won't give out to vendors. They are $40.
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Old Sat, Jul-29-2017, 01:27:18 AM   #16
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Default Re: Battery...?

Replaced mine with an Interstate back in 2009. Still the same battery in the car, could probably use a replacement but it still runs like a champ. Been in the car business for about 13 years and have been using Interstate for about 10 of those with zero issues.


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Old Sat, Jul-29-2017, 03:12:41 AM   #17
englishtom1596q
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Default Re: Battery...?

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Originally Posted by Jawse36 View Post
Replaced mine with an Interstate back in 2009. Still the same battery in the car, could probably use a replacement but it still runs like a champ. Been in the car business for about 13 years and have been using Interstate for about 10 of those with zero issues.


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They are great batteries. As said, I ask for blemished ones which they sell for $40 with no warranty. Used them in 7 of my previous cars with great success. Don't know how common a vented one would be to come by though
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Discussing Battery...? in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)