Genuine OEM Nissan Rear Differential Side Oil Seal – R200 Differential – 38342-N3100
Keep your Nissan differential properly sealed with the Genuine OEM Nissan Rear Differential Side Oil Seal – 38342-N3100, a factory replacement oil seal designed for compatible Nissan R200 rear differential assemblies.
Also known as a differential axle seal, output shaft seal or side flange oil seal, this genuine Nissan component is installed where the differential output flange enters the housing.
Its purpose is to help retain differential oil inside the housing while reducing the entry of dirt, dust and moisture around the output flange.
Over time, original differential oil seals can deteriorate due to age, heat, wear, contamination or damage during axle and driveshaft servicing.
A worn or damaged seal may allow differential oil to escape around the side flange, potentially resulting in reduced lubrication and premature wear of internal differential components if the leak is left unattended.
Replacing a leaking seal with the correctly specified genuine Nissan component helps restore the intended sealing arrangement and protect the differential's internal bearings and gears.
Ideal for differential leak repairs, R200 rebuilds, axle shaft servicing and driveline restorations on compatible Nissan Skyline, Silvia, 180SX and other Nissan performance vehicles.
Part Number Information: Nissan part number 38342-N3100 is listed as the replacement for earlier part number 38342-P9000. Please confirm compatibility against your specific differential assembly before ordering.
Product Details
- Brand: Genuine OEM Nissan
- Part Number: 38342-N3100
- Earlier Part Number: 38342-P9000
- Product Type: Differential Side Oil Seal / Output Flange Seal
- Position: Rear Differential – Side Output Flange
- Application: Compatible Nissan R200 Rear Differential Assemblies
- Function: Retains Differential Oil and Helps Prevent Contamination
- Quantity Supplied: One (1) Oil Seal
- Quantity Normally Required: Two (2) for Both Sides, Where Applicable
- Condition: Brand New – Genuine Nissan
Vehicle Compatibility
This genuine Nissan oil seal is associated with selected R200 differential applications, including compatible assemblies fitted to the following vehicle families:
- Nissan Skyline R32 – Selected Differential Applications
- Nissan Skyline R33 – Selected Differential Applications
- Nissan Skyline R34 – Selected 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 R200 Applications
- Nissan Silvia S14 – Selected R200 Applications
- Nissan Silvia S15 – Selected R200 Applications
- Nissan 180SX – Selected R200 Applications
- Nissan Stagea C34 / WC34 – Selected Compatible Differentials
- Nissan Laurel C33 / C34 / C35 – Selected Differential Applications
- Nissan Cefiro A31 – Selected Differential Applications
- Nissan 300ZX Z31 / Z32 – Selected Compatible Differential Assemblies
- Other Nissan Vehicles – Where the Factory Parts Catalogue Specifies This Oil 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 seal.
Nissan used different differential housings, output flanges, axle arrangements and oil seal dimensions across its vehicle range.
Do Not Order Based on R200 Identification Alone: Not every Nissan R200 differential uses identical side oil seals.
Please verify Nissan part number 38342-N3100 or earlier number 38342-P9000 against your differential assembly, original seal identification or the applicable Nissan factory parts catalogue before purchasing.
Key Features & Benefits
- Genuine OEM Nissan replacement component
- Designed for selected Nissan R200 differential applications
- Rear differential side output flange oil seal
- Helps prevent differential oil leaks around the axle flange
- Assists in keeping dirt, dust and moisture out of the differential housing
- Replaces aged, hardened, damaged or leaking original seals
- Manufactured to Nissan's intended component specifications
- Suitable for professional differential repairs and rebuilds
- Ideal for axle shaft and output flange servicing
- Helps maintain correct differential lubrication when properly installed
What Does a Differential Side Oil Seal Do?
The rear differential transfers power from the driveshaft to the rear axle shafts through the differential carrier and output flange arrangement.
Where the output flanges pass through the differential housing, oil seals help retain the differential lubricant while allowing the flanges to rotate.
These seals are essential for keeping the differential properly lubricated and helping prevent external contamination.
When an oil seal becomes worn, hardened or damaged, lubricant can escape around the output flange.
If the leak is not repaired, the differential oil level may gradually fall, potentially reducing lubrication to the bearings and gears.
Replacing a leaking side seal with the correct genuine Nissan component helps restore the intended sealing function.
Common Signs of a Leaking Differential Side Seal
- Oil residue around the differential output flange
- Wet or oily buildup near the inner driveshaft connection
- Differential oil collecting around the side of the housing
- Oil dripping from the differential after parking
- Gradual reduction in differential oil level
- Dirt and road grime accumulating around an oily seal area
- Visible seal deterioration during axle shaft removal
Important: Oil around the differential housing may also originate from the pinion seal, breather, housing joints or other nearby components. Confirm the source of the leak before replacing individual seals.
One Seal Supplied – Two May Be Required
A typical compatible Nissan R200 rear differential has an output flange on each side of the housing.
Each output flange uses an oil seal to help retain differential lubricant.
This listing includes one (1) oil seal only.
For differential assemblies that use part number 38342-N3100 on both sides, customers replacing both seals will need to order a quantity of two (2).
Ordering Tip: Confirm whether your differential uses the same oil seal on the left and right sides before ordering. Some Nissan differential variants use different seal arrangements.
Ideal for Differential Rebuilds & Axle Servicing
Differential side oil seals are commonly replaced during repairs that involve removing the output flanges or servicing the differential assembly.
Even when an original seal is not visibly leaking, age and previous wear may make replacement worthwhile when the differential is already disassembled.
This genuine Nissan oil seal is suitable for:
- Repairing leaking differential output flange seals
- Professional R200 differential rebuilds
- Rear axle and driveshaft servicing
- Limited-slip differential maintenance
- Skyline and Silvia driveline restorations
- Replacing damaged seals following output flange removal
- Refreshing ageing differential sealing components
Recommended Parts to Inspect During Differential Servicing
When replacing a differential side oil seal, inspect the surrounding components for wear or damage that may affect sealing performance.
Related components may include:
- Opposite differential side oil seal
- Differential output flange sealing surfaces
- Output flange retaining components
- Differential side bearings
- Pinion oil seal
- Differential breather
- Housing seals and gaskets
- Correct differential oil
Service Tip: A damaged or grooved output flange sealing surface can cause a new oil seal to leak prematurely. Inspect the flange before installing the replacement seal.
Installation Information
Replacing a differential side oil seal generally requires removal of the relevant driveshaft connection and differential output flange, depending on the differential design.
Once the original seal is accessible, carefully remove it without damaging the differential housing or surrounding components.
Clean and inspect the seal bore and output flange sealing surface before installing the replacement.
Fit the new genuine Nissan seal squarely and to the correct installation depth using an appropriate seal installation tool.
Lubricate the sealing lip as specified by the applicable Nissan workshop procedure and carefully reinstall the output flange.
After reassembly, check the differential oil level and inspect for leaks.
Important: Incorrect installation depth, damage to the seal lip or a worn output flange can result in continued oil leakage.
Professional Installation Recommended: Installation should be performed by a qualified technician familiar with Nissan differential and driveline assemblies.
Genuine Nissan Part Number Information
The earlier Nissan part number for this differential side oil seal is 38342-P9000.
The replacement part number is listed as 38342-N3100.
Nissan part number changes may reflect updated catalogue references or changes to component supply.
Always confirm the applicable part number against your vehicle's specific differential assembly before installation.
What's Included?
- 1 × Genuine OEM Nissan Rear Differential Side Oil Seal – 38342-N3100
Not Included: Second side oil seal, differential output flanges, driveshaft components, differential oil, retaining hardware, bearings or other 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 Rear Differential Side Oil Seal – 38342-N3100 only. Earlier part number 38342-P9000. Two seals may be required when replacing both sides of a compatible differential. Confirm the correct part number for each side 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.