Transmission Sensor 99-06 Big Twins

Part Number EA4100

Upgrade your speedo accuracy with this billet-housing transmission speed sensor designed for Big Twin Harley-Davidson® models 1999-2006. Crafted to replace the stock plastic sensor, the EA4100 delivers stronger, more reliable signal output for both performance and style. 

Key Features:

Heavy-duty billet aluminum construction for durability and premium fit. 

Direct-fit for Big Twin models from 1999 to 2006 (and earlier depending on chassis). 

Designed to replace the factory plastic speed sensor, improving reliability and signal quality. 

Compatibility & Install Notes:

Part Number: EA4100

Fitment: Harley-Davidson Big Twin (electronic speedometer sensor) models 1999-2006 (and similar Big Twin applications) 

Installation Tips: Remove factory sensor from transmission case, install the billet sensor in the same location, and reconnect your speedometer lead. Ensure proper torque specification and wiring integrity.

Because this is a speed sensor, verify set-up of the speedometer and odometer following installation to ensure accuracy.