Ensure smooth rotation and reliable drivetrain performance with this genuine Honda OEM radial ball bearing, part number 91051-HC4-003. Factory-engineered to exact Honda specifications, this bearing measures 43mm (inner) x 68mm (outer) x 13mm (width) and is the exact replacement for the component originally installed on your Honda ATV .

This bearing is a critical component of the rear differential / final drive assembly. It is interchangeable with Koyo DG436813 and NTN SC0929, confirming its precision-grade Japanese manufacturing origin . A direct OEM fit - no modifications required.

Kit & Cross-Reference Note

This bearing is frequently included in aftermarket differential rebuild kits alongside seal 91271-HC4-004 . However, verified owner feedback confirms that genuine Honda OEM bearings are the preferred choice for durability and correct fitment .

OEM part numbers are provided for cross-reference purposes only. This listing is for the genuine Honda bearing or an equivalent OEM-quality replacement meeting all factory specifications.

Genuine OEM Advantage

Honda genuine parts are the only components engineered and tested to meet all factory standards for safety, performance, and reliability. Trust the original.

Genuine Honda OEM parts are precision-engineered to maintain the performance, reliability, and value of your powersports vehicle.

Fitment

⚠️ Not compatible with TRX300EX Sportrax Edition .

Always verify fitment using your vehicle's specific model, year, and VIN before ordering.

Specifications