Bosch Alternators

When it comes to keeping your vehicle's electrical system running at peak performance, Bosch has been a major supplier of new alternators to Original Equipment vehicle manufacturers since 1913. This century-plus legacy of engineering excellence translates directly into the Bosch alternator lineup available today, where original equipment precision meets cutting-edge aftermarket innovation.

OE Engineering Applied to Aftermarket Excellence

Securing OE certification requires strict adherence to stringent precision and performance criteria. These same exacting criteria are also applied in the manufacturing of all Bosch aftermarket alternators. Whether you're looking at their 100% new alternators or their remanufactured eXchange program units, every component undergoes comprehensive quality validation. Bosch 100% New Alternators feature longer lasting bearings constructed using the latest advances in precision grinding, polishing and lubrication technologies for up to 30% longer life compared to conventional bearings, demonstrating how the brand continuously refines proven designs with modern manufacturing advances.

Specialized Product Lines for Every Application

Bosch doesn't take a one-size-fits-all approach to alternator design. Bosch has developed a series of superior Long Haul alternators exclusively for the American heavy duty market. These alternators have been specially engineered, employing cutting edge technology and processes, to deliver superior performance and reliability over the long run. For commercial applications, the Bosch AL9964SB represents the next generation of commercial vehicle charging technology, delivering more power and greater output at engine idle than competitive alternators. With 275 amps max output and an amazing 210 amp charge rate at idle helps maximize battery life by reducing battery deep cycling.

Beyond heavy-duty applications, Bosch offers specialized alternators for school buses with high-efficiency technology proven through millions of stop-and-go miles, refrigeration units featuring proprietary voltage regulator technology, and Universal Alternators available in 90- and 120-amp configurations for agricultural and industrial equipment upgrades.

Rigorous Testing for Real-World Reliability

Bosch Premium Alternators are quality built and 100% factory tested to ensure years of reliable performance, even under the most extreme operating conditions. The testing protocols extend far beyond basic functionality checks. All new Alternator and Starter product releases are subjected to cold storage (-40F), heat storage (+248F), and changes in humidity to ensure parts work in all temperatures and can withstand thermo-shock. Water intrusion testing to IPX4, IPX4K, and IPX9K standards ensures consistent performance during inclement weather, while full-load testing validates that each unit meets or exceeds OE torque, amperage draw, and RPM specifications.

Backed by Exceptional Support

Bosch stands behind their alternators with more than just a warranty. If any Bosch 100% New Alternator fails within two years of the date of purchase, or registration Bosch will provide a free jump-start or tow from a qualified roadside service provider. This exclusive Bosch service is available 24 hours a day, seven days a week, anywhere in the United States or Canada. This commitment to customer support reflects the confidence Bosch has in their manufacturing processes and the reliability of their charging system components, whether you're replacing a failed unit in a daily driver or upgrading to higher amperage output for accessories and aftermarket electrical demands.