My personal opinion you are in good shape provided you keep monitoring your battery load two days after a full charge, to check if it still hold the charge.

Your alternator is ok.

BUT if the "red battery light - dashboard" keeps turning on -> cha-ching (2x) - invest on new or RMFD parts + time (DIY) or fee-based labor.

Keep us posted with your end solution. GL!

Good luck

__________________
Build Date: 06/2004

2004 E53 3.0L 6 Cyl
Engine Code: M54
AT: 5L40-E/GM5 (A5S 390R)
http://s101.photobucket.com/user/lho...in/library/E53

2004 E46 M3 Coupe 3.2L 6 Cyl
Engine Code: S54
MT: S6S 420G - 6 speed
http://s101.photobucket.com/user/lho...in/library/E46
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Build Date: 10/2008
2009 E90N 328xi Sedan 6 Cyl
Engine code: N51
AT: GA6L45R/GM6
http://s101.photobucket.com/user/lho...in/library/E90