This is a Denso Alternator for the 2005 Acura MDX and TL, as Well as the 2005 Honda Odyssey and Pilot, All With the 3.5L Engine. The Two OE Numbers Listed are Identical From All Outward Appearances, and Share the Same Voltage Regulator (#'s Match). The 10210-4290 is on Acura's and Honda Pilot, as Well as Odyssey's Without VCM (Valve Cylinder Management), While the 104210-4300 is on the Odyssey w/VCM Only (So Far). This Unit Has a Conventional 6-Groove Pulley and Uses the Square "C-FR-IG-L" Plug. The 11150 Can Replace the Earlier Used 11099 Also - the Units are Virtually Identical and Will Interchange in Both Directions.