This module is needed on ES and DCT models to correct electronic shifting issues after reduction.
**All Pioneer 500/520 and standard ES ATV models need this module with reduction or will get stuck in gear electronically. 2005-2011 Foreman 500 use the "Early Style" module listed in the "Parts" section. On standard ES models the module plugs in-line at the VSS(speed sensor) connector on top-left area of the rear crankcase cover. 420 DCT models require one module. If you have a 500/520 DCT machine (EPS), you will need TWO MODULES. We pre-program these for your reduction size for most models. The module manufacturer states the module is waterproof to 10' depth. We also have these available for Rincon, 400/450 Foreman ES and 350 Rancher ES listed in the parts section as "Early Style".
**When placing your order please add to the notes section the model number off your frame (ex: TRX500FA) to insure proper parts fitment.