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      02-18-2013, 02:31 AM   #45
330indy
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Quote:
Originally Posted by CJW2OO4
Does anyone know if a 94r battery fits in our cars? (Same battery as e46)
Good question. It's an H7 size I believe and 800 CCA /1000 CA from the autozone agm platinum.
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      06-01-2013, 08:58 PM   #46
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FYI, I just replaced the battery in my Z4M with the O'Reilly AGM unit. The O'Reilly part number #48EXTAGM appears to have been replaced by #48PLT. Looks to be identical in every respect.
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      06-29-2013, 02:35 PM   #47
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Updated part of the list. When I came home my battery was dead and the tender my dad was trying to use wasnt working. Had to jump the car to get it going and had to get to a wedding. An Advanced Autoparts was the only place on the way so I checked their website and the list and went with the AutoCraft Gold Battery Part # 47H5. It works, the car starts and runs fine, but it DOES NOT fit under the battery cover for the MR. I dont know if the coupe has the same design, but the battery is not as long as the stock battery and doesn't fit under where the top of the battery cover on the MR has the sunken part for the air pump and where it screws down onto the battery mount. The connectors to the battery hit this part of the cover in the back just by a little bit and the cover will not bolt down the way it should.

Also, Advanced says the battery will work for the car, which it does, it just does not fit properly.
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      07-03-2013, 01:08 AM   #48
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I entered my battery information on the spreadsheet.
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      10-22-2013, 02:19 PM   #49
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Odyssey 34R

I bought the Odyssey 34R battery although my MC is in the shop at the moment so I haven't installed it yet. It looks to be a drop-in requiring only perhaps some minor tinkering with the bottom clamp. I use the stereo a lot and often when the engine is off while waiting in the car, and have a (small) Bazooka powered sub in the trunk too, so in addition to the ginormous 850 CCA's the fact that it's a deep-cycle battery makes it perfect IMO.

SPECIFICATIONS
Pulse (5-second) Hot Cranking Amps (PHCA) 1500
Cold Cranking Amps (CCA) 850
20Hr Nominal Capacity (Ah) 68
Reserve Capacity Minutes 135
Dimensions L x W x H (in) 10.85x6.76x7.82
Metric Dimensions L x W x H (mm) 275.6x171.7x198.6
Weight (lbs) 49.5
Weight (kg) 22.4
34R-PC1500T-A
USD$ 275.77
Item # 0785-2060A0N0

DESCRIPTION
ODYSSEY Auto/LTV Battery Model 34R-PC1500T-A
(Group 34 with tin-plated brass SAE automotive posts - reversed terminals)

Whether for everyday or emergency use, today’s vehicles are loaded with more electronics than would have been imaginable just a few years ago. ODYSSEY batteries have been designed to keep up with the changes. Because their plates are made of pure virgin lead (unlike the lead alloy in most batteries), we can pack in more plates. And more plates mean more plate surface area, and much more power — twice the overall power and three times the life of conventional batteries — up to 400 cycles at 80% depth of discharge! ODYSSEY batteries deliver the massive starting power, rapid recovery, and amazing deep cycling capability that today’s vehicles demand.
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      10-23-2013, 10:25 AM   #50
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Quote:
Originally Posted by m5m3mc View Post
I bought the Odyssey 34R battery although my MC is in the shop at the moment so I haven't installed it yet...
Does a 34R fit the ZMC? If it does, I'd recommend the Optima:

http://www.optimabatteries.com/us/en...reversed-post/

I've had really good luck with them in other cars, but their site doesn't even LIST BMW as a choice, let alone a Z car...
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      10-24-2013, 02:14 AM   #51
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I've used Optima before (excellent battery!) but IMO none are better than Odyssey. It must be packed with lead plates because it's freakishly heavy for its size.
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      11-24-2013, 01:12 PM   #52
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Quote:
Originally Posted by WestCDA
Quote:
Originally Posted by Caddyshk View Post
My 2006 Coupe came with an AGM ...
What battery group is it? My car has a group 47/H5. I tried purchasing a group 48/H6 as others said they were a direct replacement, but the the battery was too long for my factory brackets. I don't recall the details, but it wasn't a simple matter of sliding an adjustment to allow the larger battery to fit (I would rather not have returned it).

The group 47/H5 is 9 9/16 long, the 48/H6 is 11 inches long. The height (7.5) and width (6 7/8) are the same.

If I look up the replacement using Canadian Tire's parts locator, it returns the H5 size. If I use the US sites for O'Reilly or Auto Value they return both Grp 48/H6 and Grp 47/H5 as possible replacements. If I use the US Walmart battery lookup, it returns H5 only. I tried multiple years and M/non-M variants where possible.

It appears people should double check their existing battery dimensions before making a purchase ...
I also went with the longer sized battery. There was a insert in the battery well of my 2004 Z4 3.0i which I took out (specifically installed by BMW for this reason) which allows the longer battery to be installed. It only took me a few seconds to remove the insert....once I realized how it clips in. The battery harness is designed on my car to accept either battery.
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      11-24-2013, 03:59 PM   #53
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Quote:
Originally Posted by Clearancediver View Post
I also went with the longer sized battery. There was a insert in the battery well of my 2004 Z4 3.0i which I took out (specifically installed by BMW for this reason) which allows the longer battery to be installed.
Good info, thanks for the update.

I guess I didn't look hard enough at the design of the bottom plate when I picked up the first battery, and will use the longer H6 next time. Don't think it makes too much difference for my needs, to be honest - with the new H5 battery I've never had a problem with starting the car. The car will drain it down eventually, if I leave it stored for an extended period without a float charger on it.
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      12-09-2013, 07:16 PM   #54
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Just added to the sheet: NAPA 9848, best replacement I could find for my Z4MR in terms of size/specs and was also able to pick up at the local store. Total cost was $160 and it has been fine for 6 months now.
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      12-09-2013, 09:25 PM   #55
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By removing the spacer I was able to put a 94R / H7 AGM battery in my 3.0si. The size 48 (H6) would have been an exact replacement for the stock battery with the spacer remaining in place.

Very happy with the battery and hopefully the extra oomph will help on some very cold days.

The only bad news is that I waited too long and let my car get into transit mode before/during the install process. Required a $135 donation to the local dealer to get resolved :-(
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      12-12-2013, 11:21 PM   #56
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Here's the old setup and the new Odyssey 34R installed. I used the long clamp bolt in the original threaded hole sans clamp and pulled the battery towards the back so the terminal is rear of the trunk trim to expose the positive clamp for easier future sound system modifications. The battery is a tight fit vertically - the positive terminal was about 1/16" taller than that black wrap-over locating brace and required some prying to maneuver the battery into place. The body of the battery clears the brace so it can be easily slid front and back, but just. YMMV with any other brand of 34R. Also, I had to slide a plastic sheet underneath the battery on one side to level it. You cannot reuse the foam block that houses the inflation kit as there is no longer room but I had removed it earlier anyway. There appears to be plenty of room for a 15" battery front to rear.

edit: Someone asked me to clarify whether I retained the black battery under tray as seen in the top two photos and the answer is "yes." Removing it would make the installation much easier and eliminate the problem of the reinforcing ribs on the bottom of the battery case not quite settling into the try. But like I said, I wanted to keep it there.
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Last edited by m5m3mc; 12-17-2013 at 04:32 PM. Reason: Clarification
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      03-18-2014, 10:20 PM   #57
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Just added my battery to the spreadsheet. It's a perfect fit with identical OEM specs to the OEM AGM battery specified on realoem.com
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      03-19-2014, 02:27 AM   #58
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Quote:
Originally Posted by 1SerieStud View Post
Just added my battery to the spreadsheet. It's a perfect fit with identical OEM specs to the OEM AGM battery specified on realoem.com
Great! Everyone, thanks for keeping this resource alive!
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      08-24-2014, 02:22 PM   #59
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Just installed the 48PLT:

O'Reilly Super Start Extreme AGM, Part # 48EXTAGM (superceded by part no 48PLT, otherwise identical)

from like 11 on the spreadsheet. Fit PERFECT! Thanks again Finnegan!
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      08-25-2014, 03:54 AM   #60
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Quote:
Originally Posted by bjbstewart
Just installed the 48PLT:

O'Reilly Super Start Extreme AGM, Part # 48EXTAGM (superceded by part no 48PLT, otherwise identical)

from like 11 on the spreadsheet. Fit PERFECT! Thanks again Finnegan!
You're welcome!

I'm glad this resource works for folks!
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      09-05-2014, 09:20 AM   #61
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For M Roadsters/Coupes, what size battery is for the shorter tray setting, and what size is for the longer tray setting? Sorry if the spreadsheet has this information, but I am blocked from accessing it here at work.

Thanks.

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      09-05-2014, 09:37 AM   #62
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H6 is the shorter one. I believed an H7 will fit the longer tray setting.
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