BBB Industries 13788 Alternator

Overview

This BBB Industries reman alternator, part number 13788, is built for charging-system replacement on select Mazda applications. It uses a 12-volt internal regulator, 70-amp output, and a conventional pulley setup to match the original electrical layout.

Compatible With 1999-2000 Mazda Miata, N/A. The remanufactured design follows the OE manufacturer specification from Hitachi and includes a pulley for a straightforward replacement path. Part number 13788 is also cross-referenced to BP4W-18-300B and LR170-758 for the same application.

Key Features

• 70-amp output for standard charging-system replacement
• 12-volt alternator with internal voltage regulator
• Air-cooled housing with internal fan design
• Conventional pulley with 4 grooves for serpentine belt systems
• Remanufactured to OE manufacturer specification from Hitachi
• Pulley included for a complete alternator assembly

Detailed Description

BBB Industries 13788 is a reman alternator engineered around the original Hitachi design used in the Mazda Miata application listed here. The unit features clockwise rotation, negative polarity, and a plug clock position of 3, which helps maintain the correct electrical and connector orientation during replacement. Its 55 mm pulley diameter and serpentine belt configuration support direct replacement of the original charging component.

For buyers searching for a Mazda Miata alternator replacement, this part number 13788 provides the core electrical and mechanical specifications needed for fitment-based selection. It is also referenced by BP4W-18-300B and LR170-758, giving technicians a useful cross-check when matching the correct charging unit.

What It Is Used For

• Restoring battery charging performance when the alternator output drops
• Replacing a worn internal regulator that causes charging irregularities
• Addressing belt-driven charging noise related to pulley wear
• Correcting connector or rotation mismatch during alternator replacement
• Replacing a failed OE-style charging unit on the listed Mazda Miata application

Installation Notes and Tips

Verify the 4-groove serpentine pulley, clockwise rotation, negative polarity, and 3 o'clock plug orientation before installation. Confirm the vehicle uses the listed 70-amp, 12-volt configuration and compare the original unit to part number 13788 before removal. For fitment confirmation, match the OE reference and interchange numbers to the existing alternator.

Quality Assurance

This BBB Industries reman alternator is built to OE manufacturer specifications based on Hitachi application data. Part number 13788 is remanufactured for charging-system replacement and is supported by interchange references BP4W-18-300B and LR170-758.