Bosch AL4121X Remanufactured Alternator

The Bosch AL4121X is a remanufactured alternator engineered to deliver OE-matching charging performance. Bosch remanufactures its alternators to exacting standards, incorporating more new components than competing remanufactured units to ensure dependable, long-term operation.

Key Features:

• 100% factory tested — every unit undergoes exhaustive multi-point quality and performance testing throughout the remanufacturing process to ensure optimum charging output and reliability
• Full-load tested — guaranteed to comply with strict Bosch performance specifications before leaving the facility
• New internal components — includes new bearings, new self-lubricating brushes, and new clutch pulley; additional components replaced as necessary to match OE specifications
• Rotor slip rings machined to tight concentricity tolerances for extended brush life and reduced electrical interference on computer-controlled vehicles
• Voltage regulators and rectifiers tested and replaced where required — ensures stable voltage output and eliminates shorts and open circuits
• OE-identical fit and performance — designed to be a direct, drop-in replacement with no modifications required
• Built for extremes — tested to perform reliably under conditions of high heat, cold, and peak electrical demand

Backed by the Bosch Ultimate Protection Plan (when registered at time of purchase), which includes a 2-year warranty with 24-hour roadside assistance coverage including complimentary jump-start or towing service up to 50 miles.