If your battery light is coming on, it may be time for a new Mustang alternator! When alternators start to go bad, your Mustang can not charge, die unexpectedly, and not perform like it should. Don't settle for parts store junk! Replacement Mustang alternators from SVE are economical and perform better than stock. Don't forget wiring and plugs as well. 5.0 or 4.6, a new alternator upgrade will give you a charge!