This final pinion bearing (30310D) is a direct OEM-equivalent replacement for ISUZU NRR, NPR, and NQR trucks equipped with 4HK1 5.2L or 4JJ1 3.0L diesel engines, covering model years 1998 to 2026. Engineered for precise fitment and reliable operation, it ensures smooth rotation of the pinion gear, reduces noise and vibration, and maintains optimal drivetrain performance under heavy-duty conditions. Ideal for replacing worn, noisy, or damaged final pinion bearings in commercial vehicles.

OEM-Equivalent Fit: Matches factory specifications for correct alignment and reliable performance.

Truck-Specific Compatibility: Fits ISUZU NRR, NPR, and NQR (1998–2026) with 4HK1 5.2L or 4JJ1 3.0L diesel engines.

Durable & Heavy-Duty: Built to withstand high torque, repeated rotation, and demanding commercial truck operation.

Smooth & Quiet Operation: Reduces vibration and noise while maintaining precise pinion rotation.

Drivetrain Reliability: Ensures optimal performance and protects surrounding components from premature wear.

Easy Installation: Direct replacement using factory mounting points; no modifications required.

OEM

1098120421 / 1098120420

1098120360 / 1098120412

1098120370 / 9000930700