Product Description

The Vernalbloom Honda Civic alternator 31100-5AY-H01 is a high-output 135A charging system designed for modern Honda Civic platforms.

This alternator replaces OEM number 31100-5AY-H01 and cross references ALN3550AN, ensuring stable and efficient power delivery for vehicles with higher electrical demand such as infotainment systems, ECU control units, and modern safety systems.

Built with reinforced metal housing and 7-groove pulley design, it ensures long-term durability, stable voltage output, and OEM-level performance.

Each unit is fully tested before shipment to guarantee reliability and perfect fitment.

Key Features

• OEM replacement 31100-5AY-H01
• Compatible ALN3550AN
• 12V 135A high output system
• Modern Honda Civic platform
• Heavy-duty electrical load support
• Durable metal housing
• 7-groove pulley design
• Stable voltage regulation
• Factory tested before shipment

Compatible Vehicles

• Honda Civic 1.5T / 1.8L (new generation)
• Honda Civic FC / FK platforms (selected trims)
• Honda Earth Dreams engine platforms
• Modern Asia / EU Civic models with high electrical load