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F80/F82/F83 M3 and M4 (2015 - Current)
F80 BMW M3 sedan, F82 BMW M4 coupe and F83 M4 convertible forum. This 5th generation M3 and all new M4 features a 3.0 liter twin turbo engine (engine code S55) 425hp and 406lbs of torque! Heavy use of light weight materials makes this generation lighter and faster then the outgoing E9x M3.

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  #1  
Old 07-20-2019, 07:36 PM
96redLT4 96redLT4 is offline
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What....Our cars come stock with a lithium battery!!

'15 M4 which I have had since new. Took it in for the yearly service. First one BTW that I have had to pay for Wanted the tech to check the battery as it is now 5 yrs old. Said the battery still tested fine and advised me to run it to the end as the replacement will be, drum roll please, $2K. So my questions....how many yrs are people getting from the OEM battery and has anyone had experience replacing the Lithium with an AGM battery? I love the car but would rather save $1700 bucks than 13kg.

Jim
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Old 07-21-2019, 04:49 AM
southcoastguy southcoastguy is offline
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Interesting! I expect there are several AGM batteries that will fit, but I am not sure of the CCA requirements.
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Old 07-21-2019, 04:56 AM
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Doug Huffman Doug Huffman is offline
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Quote:
Originally Posted by 96redLT4 View Post
'15 M4 which I have had since new. Took it in for the yearly service. First one BTW that I have had to pay for Wanted the tech to check the battery as it is now 5 yrs old. Said the battery still tested fine and advised me to run it to the end as the replacement will be, drum roll please, $2K. So my questions....how many yrs are people getting from the OEM battery and has anyone had experience replacing the Lithium with an AGM battery? I love the car but would rather save $1700 bucks than 13kg.

Jim
I doubt that LiPo and AGM can be interchanged for their different charge controllers and requirements. The AGM charge controller is integral to the ECU and informed by the Intelligent Battery Sensor. The LiPo battery charge controller is integral to the battery case and an IBS is not provided.

The maximum permitted voltages are similar due to the vehicle electrical system capability to produce voltages, but the LiPo maximum charge rate ~200 Amps might burst an AGM case.

https://www.newtis.info/tisv2/a/en/f...der/1VnXlwrhyA
https://www.newtis.info/tisv2/a/en/f...der/1VnXrZsmjH
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
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Last edited by Doug Huffman; 07-21-2019 at 05:11 AM.
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Old 07-21-2019, 06:22 AM
Autoputzer Autoputzer is offline
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Try running your VIN through one of those on-line BMW parts websites to see what one of those little gems cost.

There's a post on the E90 M3 forum saying that DCT's are not repairable and a new one is $14k. There might be another M care in my future, but that could settle the question of it being a manual or a DCT.
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Old 07-21-2019, 06:45 AM
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Doug Huffman Doug Huffman is offline
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I copied the part number off the NewTIS image - 61 21 9 312 759 - to search for prices. First RealOEM "The specified part 61219312759 was not found." Second, my general purpose, not G00gle, search engine did not find the PN or prices.

By description the prices were all over the map and none of batteries that I have any confidence in their suitability. I even noticed a battery dressed up to look like a Deltran product and called a "Battery Tender." Deltran really wants that trade mark!
__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 07-21-2019, 07:28 AM
Autoputzer Autoputzer is offline
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Quote:
Originally Posted by Doug Huffman View Post
I copied the part number off the NewTIS image - 61 21 9 312 759 - to search for prices. First RealOEM "The specified part 61219312759 was not found." Second, my general purpose, not G00gle, search engine did not find the PN or prices.

By description the prices were all over the map and none of batteries that I have any confidence in their suitability. I even noticed a battery dressed up to look like a Deltran product and called a "Battery Tender." Deltran really wants that trade mark!
Maybe they're still covered by a BMW secret warranty, hence no price published. First time BMW owners get pissed when they pay $500 for a AGM battery and registration. Maybe BMW NA's afraid they'd go postal in the dealerships over a $2000 Li-ion battery.
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Old 07-21-2019, 10:03 AM
96redLT4 96redLT4 is offline
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Thanks for the replies guys! The service writer printed me out some info from BMW on the battery. Seemed almost like they were doing it as a 'test' for the M line. I was always under the impression that you only buy a Li battery for weight savings and that performance characteristics were less than for AGM. According to their info battery life looks to be longer, but how much I wonder and performance characteristics are a little better provided car is not in really cold or really hot environments. I could find anything on this board about replacements so I guess he original cars like mine are still on the original batteries. Anyone know if they are still putting them in the newest models eg the CS? This alone might be a reason to upgrade your 5 yr old car if you were on the edge trying to decide.

J
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Old 07-21-2019, 10:03 AM
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Doug Huffman Doug Huffman is offline
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I believe that a 90 AH Li-ion will be found to cost about the same as a 90 AH AGM.

Also their aging characteristics will be found to be similar.

See Battery University .com by CADEX.
__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.

Last edited by Doug Huffman; 07-21-2019 at 10:32 AM.
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Old 07-21-2019, 02:49 PM
96redLT4 96redLT4 is offline
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Quote:
Originally Posted by Doug Huffman View Post
I believe that a 90 AH Li-ion will be found to cost about the same as a 90 AH AGM.

Also their aging characteristics will be found to be similar.

See Battery University .com by CADEX.
Thanks Doug. Will check it out.

J
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