Vehicle compatibility: this alternator is compatible for Ford Focus MK2 2.5 ST RS RS500 2005-2012. Compatible for Ford Focus Ii 2.5 RS 2009-2012. Compatible for Ford Focus Ii 2.5 RS 500 2010-2012. The alternator provides protection from excessive charging or failure due to shorts in your car's wiring that can cause spikes or open circuits.
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