Bosch AL4225X Alternator

Bosch Remanufactured Alternator for Mazda Protege

Bosch AL4225X is a remanufactured 12-volt alternator built for charging-system replacement on select Mazda Protege and Protege5 applications. It is an 80-amp unit with an internal fan, internal regulator, and included pulley for direct-fit service on the listed vehicles.

Key Features

• Remanufactured Bosch alternator for charging-system repair
• 12-volt, 80-amp output
• Internal fan and internal regulator
• Clockwise rotation
• 4-groove pulley with 55 mm outside diameter
• Aluminum case and aluminum case material for OE-style fitment
• Plug type 303 with rear-view plug clocking at 6 o’clock
• External fan included and external regulator included as listed

Detailed Description

Bosch Premium Alternators are remanufactured, tested charging components built for dependable electrical output and consistent operation. The AL4225X alternator is engineered for Mazda Protege and Mazda Protege5 models listed below, including 1999-2003 Mazda Protege and 2002-2003 Mazda Protege5, with a fitment note for 2002-2003 Mazda Protege applications limited to 80-amp alternator configurations. This Bosch AL4225X alternator cross-references FP3418300A and FP3418300B for the same application.

What It Helps Fix

• Battery warning light caused by alternator output loss
• Low charging voltage during driving
• Dim lights or unstable electrical performance
• Battery drain from a failing charging system
• Noise or charging irregularities from a worn alternator

Installation Notes and Tips

Verify the vehicle’s alternator configuration before installation, especially on 2002-2003 Mazda Protege models that require the 80-amp application. Confirm pulley groove count, plug type 303, and rear mounting-ear clocking at 6 o’clock to match the existing setup. Check belt condition, battery state, and charging-system connections during replacement to help ensure proper operation after installation.

Quality Assurance

Bosch remanufactured alternators are built, tested, and inspected to meet charging-system performance and reliability expectations for the listed Mazda applications.