Bosch AL3388X Alternator

Reliable Remanufactured Alternator for Scion, Subaru, and Toyota

The Bosch AL3388X Alternator (Remanufactured) is designed to provide dependable electrical charging performance for select Scion, Subaru, and Toyota models. Engineered to meet OEM specifications, this 12-volt alternator ensures consistent power delivery and efficient operation for vehicles like the Scion FR-S, Subaru BRZ, and Toyota 86.

• 12-volt electrical system compatibility
• Internal fan type for effective cooling
• Clockwise rotation direction
• Includes a 6-groove pulley with a 58.8 mm outside diameter
• Internal voltage regulator for stable output
• Aluminum case material and color for durability and heat dissipation
• 130 amp amperage rating suitable for high electrical demand
• Plug clock rear view main mounting ear positioned at 6 o'clock
• Remanufactured to meet original equipment standards

About the Bosch Alternator (Remanufactured) Product Line

The Bosch Alternator (Remanufactured) line offers high-quality remanufactured alternators that restore vehicle charging systems to factory performance. Each unit undergoes rigorous testing and refurbishment to ensure reliability and longevity. The AL3388X is part of this line, providing a cost-effective solution without compromising on Bosch’s engineering standards.

Detailed Product Description

This Bosch AL3388X alternator features an internal fan design that helps maintain optimal operating temperatures, reducing wear and extending service life. The clockwise rotation matches the original equipment setup for the Scion FR-S, Subaru BRZ, and Toyota 86, ensuring proper belt alignment and function. The included 6-groove pulley with a 58.8 mm diameter supports 6-rib serpentine belts, common in these models. Constructed with an aluminum case, the alternator offers lightweight durability and efficient heat dissipation. Its internal voltage regulator maintains consistent amperage output rated at 130 amps, supporting the electrical demands of modern vehicle systems.

Common Applications and Issues Addressed

• Restores charging system functionality in Scion FR-S, Subaru BRZ, and Toyota 86
• Replaces alternators with worn or damaged pulleys or fans
• Solves intermittent or low voltage output problems
• Addresses battery drain caused by faulty alternator regulators
• Eliminates unusual noises from failing alternator bearings or fans

Installation Notes and Tips

Ensure the alternator rotation direction matches the original unit (clockwise) before installation. Verify the pulley groove count (6 grooves) and diameter (58.8 mm) to match the vehicle’s belt system. The plug clock rear view main mounting ear is positioned at 6 o’clock, which is critical for proper fitment. Use appropriate torque specifications for mounting bolts and reconnect electrical connections securely. Testing the charging system after installation is recommended to confirm proper operation.

Quality Assurance and Warranty

This Bosch AL3388X alternator is remanufactured to meet or exceed original equipment manufacturer standards. Bosch applies strict quality control and testing procedures to ensure reliable performance. While specific warranty details are not provided here, Bosch remanufactured alternators typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or supplier for exact warranty terms.