I also have an OEM battery from a 2006 325. free. was working fine when I pulled it and upgraded to a larger one at BMW Toronto.
'06 325i Monaco blue on Lemon dakota Sport + Prem (sold)
'05 Lincoln Aviator Ultimate
'03 10th Anniv SVT Cobra a.k.a "Darkhorse" 454RWHP/503RWTQ
'12 Mustang GT 11.92 @ 115.3 mph 390RWHP /375RWTQ