130 Amp Bosch Alternator. Today's advanced automotive technology places increased demands on automotive components. The high heat environment places an extreme burden on the individual components of a vehicle's alternator. When an alternator fails, chances are its components have outlived its service life. Bosch Professional Preferred 100% New Alternators are the perfect solution. The same manufacturing and design technology behind Bosch alternators for Nextel Cup racing applications go into every Bosch new alternator.