Genuine OEM Nissan Drive Pinion Oil Seal – R200 Differential – 38189-N3112
Keep your Nissan differential properly sealed with the Genuine OEM Nissan Drive Pinion Oil Seal – 38189-N3112, a factory replacement oil seal designed for selected Nissan R200-series differential assemblies.
Also known as a differential pinion seal, differential input shaft oil seal or pinion flange seal, this genuine Nissan component is fitted at the front of the rear differential housing, where the drive pinion flange connects to the tailshaft.
Its primary function is to retain differential lubricant inside the housing while helping prevent dirt, moisture and other contaminants from entering around the rotating pinion flange.
Over time, original differential pinion seals can deteriorate through age, heat, normal wear, contaminated lubricant or damage during driveline servicing.
A worn or damaged seal may allow differential oil to escape around the pinion flange, potentially reducing lubrication to the internal bearings and ring and pinion gears if the leak is left unattended.
Replacing a leaking seal with the correctly specified genuine Nissan component helps restore the factory sealing arrangement and maintain reliable differential operation.
Ideal for repairing differential oil leaks, replacing pinion bearings, rebuilding compatible R200 differentials or completing a factory-correct Nissan driveline restoration.
Part Number Information: Nissan part number 38189-N3112 is listed as a replacement for earlier part numbers 38189-N3110 and 38189-N3111 in applicable applications. Always verify the correct seal against your specific differential assembly before purchasing.
Product Details
- Brand: Genuine OEM Nissan
- Part Number: 38189-N3112
- Earlier Part Numbers: 38189-N3110 / 38189-N3111
- Product Type: Differential Drive Pinion Oil Seal
- Alternative Names: Differential Pinion Seal / Pinion Flange Seal
- Position: Front of Rear Differential Housing
- Application: Selected Nissan R200-Series Differentials
- Function: Retains Differential Oil Around the Pinion Flange
- Quantity Supplied: One (1) Oil Seal
- Condition: Brand New – Genuine Nissan
Vehicle Compatibility
This genuine Nissan drive pinion oil seal is associated with selected R200 differential applications across the Nissan vehicle range, potentially including compatible rear differential assemblies fitted to:
- Nissan Skyline R31 – Selected Rear Differential Applications
- Nissan Skyline R32 – Selected Rear Differential Applications
- Nissan Skyline R33 – Selected Rear Differential Applications
- Nissan Skyline R34 – Selected Rear Differential Applications
- Nissan Skyline GT-R BNR32 – Selected Compatible Rear Differentials
- Nissan Skyline GT-R BCNR33 – Selected Compatible Rear Differentials
- Nissan Skyline GT-R BNR34 – Selected Compatible Rear Differentials
- Nissan Silvia S13 – Selected Rear Differential Applications
- Nissan Silvia S14 – Selected Rear Differential Applications
- Nissan 180SX – Selected Rear Differential Applications
- Nissan Fairlady Z / 300ZX Z32 – Selected Compatible Rear Differentials
- Nissan Stagea WC34 – Selected Compatible Rear Differentials
- Other Nissan Vehicles – Where the Factory Parts Catalogue Specifies This Seal
Important Fitment Information: The vehicle list above represents potential applications only. It does not mean every model, year, drivetrain or differential variant uses this oil seal.
Nissan used different differential housings, pinion flanges, seal dimensions and final drive arrangements across its vehicle range.
Do Not Order Based on R200 Identification Alone: Not every Nissan R200 differential uses the same pinion oil seal.
Please verify Nissan part number 38189-N3112 or its applicable earlier part number against your original seal, specific differential assembly or Nissan factory parts catalogue before purchasing.
Key Features & Benefits
- Genuine OEM Nissan replacement component
- Designed for selected Nissan R200 differential applications
- Rear differential drive pinion oil seal
- Installed at the differential input flange
- Helps prevent differential oil leaks around the pinion flange
- Assists in protecting internal components from external contamination
- Replaces aged, hardened, worn or damaged original seals
- Manufactured to Nissan's intended component specifications
- Suitable for differential servicing and professional rebuilds
- Helps maintain correct differential lubrication when properly installed
What Does the Differential Pinion Oil Seal Do?
The rear differential transfers rotational power from the tailshaft to the rear axle shafts through the drive pinion and ring gear assembly.
The drive pinion shaft passes through the front of the differential housing, where the input flange connects to the tailshaft.
The pinion oil seal is installed around this rotating flange to help retain lubricant inside the differential housing.
Correct sealing is important for maintaining the differential oil level and reducing the risk of contamination.
When the original seal deteriorates, oil can escape around the flange and collect on the front of the differential housing.
If the leak is left unattended, the differential oil level may gradually fall, potentially affecting lubrication of the pinion bearings and ring and pinion gears.
Common Signs of a Leaking Differential Pinion Seal
- Oil residue around the differential input flange
- Wet or oily buildup at the front of the differential housing
- Differential oil collecting around the tailshaft flange connection
- Oil being thrown onto nearby components during rotation
- Oil dripping from the front of the differential after parking
- Gradual reduction in differential oil level
- Dirt and road grime accumulating around an oily pinion flange
- Visible seal damage during tailshaft or differential servicing
Important: Oil around the differential may also originate from the side seals, housing joints, breather or other components. Confirm the source of the leak before replacing individual seals.
Ideal for Nissan R200 Differential Rebuilds
The Nissan R200 differential has been used across a wide range of rear-wheel-drive and performance vehicle applications.
As these vehicles age, differential servicing and rebuilds are increasingly common during restorations, driveline upgrades and preventative maintenance.
The pinion oil seal is an important component to inspect whenever the pinion flange is removed or the differential is disassembled.
This genuine Nissan seal is suitable for:
- Repairing leaking differential input flange seals
- Professional R200 differential rebuilds
- Pinion bearing replacement
- Tailshaft and pinion flange servicing
- Skyline and Silvia driveline restorations
- Replacing damaged seals during differential repairs
- Refreshing ageing differential sealing components
- Maintaining original Nissan final drive assemblies
Recommended Related Differential Components
When replacing a differential pinion oil seal, inspect the surrounding components for wear or damage that may affect sealing performance.
Related components may include:
- Front pinion bearing
- Rear pinion bearing
- Pinion flange and sealing surface
- Pinion nut and retaining hardware
- Applicable pinion bearing spacer or collapsible crush sleeve
- Differential carrier side bearings
- Differential side oil seals
- Differential breather
- Correct differential oil
Service Tip: A worn or grooved pinion flange sealing surface can cause a new oil seal to leak prematurely. Inspect the flange before fitting the replacement seal.
Important Pinion Preload & Installation Information
Replacing a differential pinion oil seal may require removal of the tailshaft connection, pinion flange and retaining nut.
The pinion nut and associated adjustment components form part of the pinion bearing preload arrangement.
Incorrect removal or reinstallation procedures can alter pinion bearing preload and potentially cause bearing damage, overheating or differential failure.
Do Not Simply Overtighten the Pinion Nut: The correct service procedure depends on the differential design and condition of the existing components.
Before installation, inspect the original seal, pinion flange and surrounding housing for wear or damage.
Install the replacement seal squarely and to the correct depth using an appropriate installation tool, following the applicable Nissan workshop procedure.
After reassembly, verify the required pinion bearing preload, flange operation and differential oil level before returning the vehicle to service.
Professional Installation Strongly Recommended: Pinion seal replacement should be performed by a qualified technician or differential specialist familiar with Nissan final drive assemblies.
Genuine Nissan Part Number Information
The earlier Nissan part numbers associated with this drive pinion oil seal are:
- 38189-N3110
- 38189-N3111
The replacement part number is listed as 38189-N3112.
Nissan part number supersessions may reflect updated catalogue references or changes to component supply.
Always confirm the applicable part number against the specific differential assembly before installation.
What's Included?
- 1 × Genuine OEM Nissan Drive Pinion Oil Seal – 38189-N3112
Not Included: Pinion flange, pinion nut, collapsible spacer, pinion bearings, differential side seals, differential oil or additional rebuild components unless specifically stated.
Why Choose Genuine Nissan?
Genuine Nissan replacement parts are manufactured to the specifications required for their intended factory applications.
For differential sealing components, correct dimensions, fitment and sealing characteristics are important for maintaining reliable lubrication and preventing oil loss.
Whether you're repairing a leaking Skyline GT-R differential, restoring a Silvia or rebuilding a compatible Nissan R200 assembly, genuine Nissan components are an excellent choice for maintaining original equipment specifications.
Note: This listing includes one (1) Genuine OEM Nissan Drive Pinion Oil Seal – 38189-N3112 only. Earlier associated part numbers 38189-N3110 and 38189-N3111. Confirm compatibility with your specific differential assembly before purchasing. Supplied in genuine Nissan packaging, which may be removed for product photography.
Australian Stock & Fast Dispatch: At OEM4JDM, every part listed as In Stock is physically on our shelf in Australia and ready for fast dispatch.