Need to replace my battery in a 2011 R56. I have read that a group 47 and 48 will fit but some require mods. What have others successfully used without mods? Looking for the specific brands and model if you know it. It is a MCS.
Thanks

 

i keep hearing that Advance Auto has a battery for the r56's that require no modification on the install and quite affordable. check it out!

 

autozone works fine, no mods needed

 

group 47 or 48? 47 is about the same size but is a little longer. 48 is much bigger in general. Which group?

 

The correct size is H5. All major auto parts stores have them.

 

I got mine at Walmart. $100.00. No issues. Maxx.

 

Anything that is a drycell design is what you like Interstate, Optima, and Braille. Then you won't have to worry about venting it.