BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > DIY Guides/ Discussions
 
ESS Tuning
Post Reply
 
Thread Tools Search this Thread
      01-03-2014, 03:37 PM   #1
sigmachi96
New Member
 
sigmachi96's Avatar
 
Drives: BMW M3 (E93)
Join Date: Dec 2013
Location: Redmond, WA

Posts: 23
iTrader: (0)

Replacing a 2008 M3 E93 Battery

Like other prior posts, started to see my original OEM battery coming to the end of life (clock slow, odometer resetting).

Rather than pay a premium at a local BMW dealership, went the route of others and bought a similar spec'd battery to OEM. I also save on costs by installing it myself (see pictures for the install in the next post) and registered the battery at an independent BMW service shop.

Battery:
H8-AGM Duralast - http://www.autozone.com/autozone/par...9459_829936_0_
Retail $169.99
Paid $154.99 (returned my original battery so non $15.00 core charge and used this $15 coupon - http://click1.email.retailmenot.com/...rsqzqzpqp.html)

Labor:
Free installed it myself (~30 minutes)

Registration:
$55 - http://www.eastsidebavarian.com/ (local BMW independent car service shop)

Total Cost = $209.99 + WA tax
sigmachi96 is offline  
0
Reply With Quote
      01-03-2014, 03:54 PM   #2
sigmachi96
New Member
 
sigmachi96's Avatar
 
Drives: BMW M3 (E93)
Join Date: Dec 2013
Location: Redmond, WA

Posts: 23
iTrader: (0)

Tools:
Gloves
Flat Head Screw Driver
10MM Socket
13MM Socket
Electrical or Painter's Tape

Remove the initial cover by turning the highlighted screw.


Remove the other covers by turning the screws and pulling the pieces.


Unscrew the Negative terminal and wrap with tape. Unscrew the battery hold downs to give you room to move the battery to unhinge the top battery area. There is a 13MM bolt under the + symbol that will allow you to remove the red battery portion. Once set aside, you can unscrew the positive terminal.


Remove the battery vent hose (note there may be traces of acid so it is important to be wearing gloves. Lift the original OEM battery by the handles (note it is heavy and easier to take it out from the side where you have more leverage and lifting area.


What the area looks like when the battery is removed.


Reverse the order and ensure you put the vent battery hose back into the positive portion of the battery. Also connect the positive terminal first and the negative terminal last.


Go to a independent service shop to register your new battery.
sigmachi96 is offline  
0
Reply With Quote
      01-04-2014, 09:02 PM   #3
pbonsalb
Lieutenant Colonel
 
Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

Posts: 1,610
iTrader: (3)

I did not wear gloves when I did it.
pbonsalb is offline  
0
Reply With Quote
      01-06-2014, 03:59 PM   #4
WayneM3
Private First Class
 
Drives: E90M3
Join Date: Apr 2011
Location: New York, NY

Posts: 161
iTrader: (0)

I just replaced mine with the Sears DieHard similar battery. I already had the BMW Logger software so I was able to register it myself.
WayneM3 is offline  
0
Reply With Quote
      01-06-2014, 05:23 PM   #5
whats77inaname
Banned
 
Drives: when at all possible
Join Date: Aug 2011
Location: Tx

Posts: 1,740
iTrader: (15)

Good write up, OP. Next time, you'll be ready to code the reset yourself

http://www.e90post.com/forums/showthread.php?t=727091
whats77inaname is offline   United_States
0
Reply With Quote
      01-12-2014, 05:35 PM   #6
GoRoundel
Registered
 
GoRoundel's Avatar
 
Drives: 2008 E93 M3
Join Date: Jan 2014
Location: New Jersey

Posts: 2
iTrader: (0)

I believe the OEM battery for the 2008 E93 vert is rated as 90 Ah / CCA 900. DuraCell and Duralast H8-AGM batteries are rated as 92 Ah / CCA 850.

Is it okay to put a replacement with a different rating? Can someone please clarify?

P.S. Two BMW dealers in NJ mentioned that BMW recently has updated that the 92 Ah / CCA 850 is an acceptable rating.
GoRoundel is offline  
0
Reply With Quote
      01-15-2014, 07:40 PM   #7
sigmachi96
New Member
 
sigmachi96's Avatar
 
Drives: BMW M3 (E93)
Join Date: Dec 2013
Location: Redmond, WA

Posts: 23
iTrader: (0)

Quote:
Originally Posted by GoRoundel View Post
I believe the OEM battery for the 2008 E93 vert is rated as 90 Ah / CCA 900. DuraCell and Duralast H8-AGM batteries are rated as 92 Ah / CCA 850.

Is it okay to put a replacement with a different rating? Can someone please clarify?

P.S. Two BMW dealers in NJ mentioned that BMW recently has updated that the 92 Ah / CCA 850 is an acceptable rating.
Haven't had an issue and BMW service shop I went to who registered the battery said it was fine.
sigmachi96 is offline  
0
Reply With Quote
      01-16-2014, 11:16 AM   #8
Sean05
Putcha ang ganda...
 
Sean05's Avatar
 
Drives: 08 MR E92 M3
Join Date: Feb 2010
Location: Los Angeles, Brea CA.

Posts: 5,331
iTrader: (9)

Send a message via Yahoo to Sean05
Quote:
Originally Posted by GoRoundel View Post
I believe the OEM battery for the 2008 E93 vert is rated as 90 Ah / CCA 900. DuraCell and Duralast H8-AGM batteries are rated as 92 Ah / CCA 850.

Is it okay to put a replacement with a different rating? Can someone please clarify?

P.S. Two BMW dealers in NJ mentioned that BMW recently has updated that the 92 Ah / CCA 850 is an acceptable rating.
its to ok but you need to register it...

when i got mine at sears its their AGM battery with 92ah / cca 950 i had to register it to be safe.. BMW recommend it and even local shops do... yes it will work without having to do it but im sure battery will not last long or might see issues in the long run. better to be safe than sorry.
__________________
Sean05 is offline   Philippines
0
Reply With Quote
      01-20-2014, 04:33 PM   #9
GoRoundel
Registered
 
GoRoundel's Avatar
 
Drives: 2008 E93 M3
Join Date: Jan 2014
Location: New Jersey

Posts: 2
iTrader: (0)

Thumbs up Replaced with Duracell AGM (92 Ah / 900 CCA / Size: H8AGM)

Thanks guys!

Replaced the OEM battery (90 Ah / 900 CCA) made by Banner an Austrian company, with Duracell AGM (92 Ah / 850 CCA / Size: H8AGM / Group Size: 49). Bought it at Sam's Club for $159.95 + tax.

Duracell is made in the USA, by East Penn. Comes with a 3 year Free Replacement Warranty and 8 year Pro-rated Warranty.

My Indy installed the battery and registered it with the car for me... All is well now!

P.S. Dealers wanted $325 + tax (minus 20% discount for CCA members) plus installation ($150 for 1 hour labor). OEM battery comes with only 2 year Pro-rated Warranty.
Attached Images
 

Last edited by GoRoundel; 01-20-2014 at 04:44 PM.
GoRoundel is offline  
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 11:20 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST