What does a pinion oil seal do?

A pinion oil seal is located where the driveshaft connects to the differential. Its main job is to prevent the gear oil inside the differential from leaking out and to keep dirt, water, and other contaminants from getting into the differential housing.

What vehicles does this Omix pinion oil seal fit?

This seal fits many Willys and Jeep models from 1941 to 1995 and again from 1997 to 2006. This includes various CJ models, Wranglers (YJ), Cherokees (XJ), Comanches (MJ), Wagoneers (SJ), and older Willys vehicles equipped with Dana 25, 27, 30 front, or Dana 44 rear differentials.

What is the warranty on this Omix pinion oil seal?

Omix offers a Limited 5 Year Warranty on this replacement pinion oil seal. This coverage helps ensure you're protected against manufacturing defects for an extended period.

OMIX

Specifications

Brand: OMIX
Part #: 16521.01
UPC: 804314021917

OMIX

Omix Pinion Oil Seal 45-93 Willys & Jeep Models

Name: Omix Pinion Oil Seal 45-93 Willys & Jeep Models
Brand: OMIX
Price: 4.71 USD
Availability: InStock

$4.71

On Backorder — Expected to ship by May 28, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Omix Pinion Oil Seal 45-93 Willys & Jeep Models. Keeps differential oil in and contaminants out for many Willys and Jeep models.

Key Features

Fits 1941-1995 and 1997-2006 Willys and Jeep models with specific Dana differentials.
Steel body with a rubber inner construction for durability.
Direct fit design for straightforward installation.
OE style replacement part.
Limited 5 Year Warranty.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

Omix is known for offering a wide range of OE quality replacement parts for Jeep and Willys vehicles, helping to keep the Jeep legacy alive. This replacement pinion oil seal is designed to keep differential oil contained and prevent contaminants from entering your axle housing, which is crucial for the longevity of your differential. It's an 'open-back' style seal, specifically made to fit a variety of Willys and Jeep models, including popular ones like the CJ5, CJ7, and Wrangler YJ, as well as older Willys vehicles and the SJ Wagoneer.

This seal is constructed with a steel body and a rubber inner, offering a solid build for its intended purpose. It's designed as a direct fit, meaning it should install without needing modifications, making the replacement process straightforward. Ensuring your pinion seal is in good condition prevents leaks and protects your differential gears from damage caused by dirt and water ingress.