SX-6B3A NATIONAL Rear Outer Differential Pinion Repair Sleeve

Review NATIONAL Rear Outer Differential Pinion Repair Sleeve For Bmw for BMW C175 M3 RZ 1988–1991

National SX-6B3A Rear Outer Differential Pinion Repair Sleeve for 1988-1991 BMW M3 (RZ)

The National SX-6B3A Rear Outer Differential Pinion Repair Sleeve is an essential component designed for BMW M3 models produced between 1988 and 1991 with RZ differential assemblies. This repair sleeve is specifically engineered to address common issues related to the pinion shaft and its connection to the differential housing.

The pinion shaft in the BMW M3 differential is susceptible to wear and fatigue, leading to potential failure. The SX-6B3A Rear Outer Differential Pinion Repair Sleeve provides a robust solution to prevent further damage and restore the functionality of the differential assembly.

Made from high-quality materials, this repair sleeve is precision-engineered to fit perfectly in the OEM location. It is designed to be a direct replacement, ensuring a seamless installation process. The sleeve is manufactured with advanced technology to ensure a precise fit, optimal strength, and durability.

Installation of the SX-6B3A Rear Outer Differential Pinion Repair Sleeve is straightforward and can typically be completed in a few hours by a competent mechanic or an experienced DIY enthusiast. The sleeve comes with clear installation instructions to guide users through the process.

By installing the National SX-6B3A Rear Outer Differential Pinion Repair Sleeve, BMW M3 owners can enjoy the peace of mind that comes with knowing their differential is protected against potential pinion shaft failure. This repair sleeve is an affordable and effective solution for maintaining the performance and reliability of their cherished vehicles.

In summary, the National SX-6B3A Rear Outer Differential Pinion Repair Sleeve is an essential upgrade for BMW M3 (RZ) models from 1988 to 1991. It addresses common issues related to the pinion shaft, providing a robust solution to prevent further damage and restore the functionality of the differential assembly. This sleeve is a direct replacement, made from high-quality materials, and can be installed with ease. With its affordable price and significant impact on the performance and reliability of the BMW M3, it is an investment worth making for any enthusiast or daily driver.

Pros and Cons of Buying a National SX-6B3A Rear Outer Differential Pinion Repair Sleeve for 1988-1991 BMW M3 (RZ)

a. Cost-effective: Compared to a full differential rebuild or replacement, a repair sleeve is a more affordable option for addressing issues with the pinion in the rear differential of your BMW M3 (RZ).

b. Easy installation: The repair sleeve can typically be installed in your garage with simple hand tools, saving you time and money compared to professional labor costs.

c. Quality: National is a reputable brand with a proven track record of producing high-quality automotive parts. The SX-6B3A repair sleeve is designed specifically for the BMW M3 (RZ) and is engineered to provide a reliable solution for fixing a damaged pinion.

a. Temporary fix: While the repair sleeve can effectively address the issue with a damaged pinion, it does not address any underlying causes. If there are other issues with the differential, they may still need to be addressed to prevent future failures.

b. Availability: Depending on your location and the availability of the part from local suppliers, you may have to wait for the repair sleeve to be shipped to you, potentially causing additional delays in getting your vehicle back on the road.

c. Installation complexity: While the installation process is generally straightforward, there are some steps that require careful attention to ensure proper alignment and torque. Failure to follow the instructions correctly could result in further complications or damage to the differential.

The decision to buy a National SX-6B3A rear outer differential pinion repair sleeve for your 1988-1991 BMW M3 (RZ) depends on your priorities and circumstances. If you're looking for a cost-effective solution to address a damaged pinion and are comfortable with the installation process, this could be an excellent choice. However, keep in mind that it is a temporary fix and may not address any underlying issues with the differential. Additionally, if you're in a time crunch, consider the potential delays that might come with having the part shipped to you.

If you decide to purchase the National SX-6B3A rear outer differential pinion repair sleeve, make sure to read and follow the installation instructions carefully. Ensure that you have all the necessary tools and that you take your time with the alignment and torque steps. If you're unsure about any aspect of the installation process, consider seeking professional help to avoid potential complications. Additionally, consider having the differential inspected by a professional to identify and address any underlying issues that could cause future failures.

Details:

National rear outer differential pinion repair sleeve for 1988 - 1991 Bmw M3 Rz: status: in stock.

specifications differentialsdepo:

• for models: C175, M3, Rz
• for makes: Bmw
• for years: 1988–1991
• brand: National
• mpn: Sx-6b3a
• placement on vehicle: Driveline Axles Hardware Fasteners Fittings
• type: Differential Pinion Repair Sleeve
• item length: 2.190
• manufacturer warranty: 1 Year
• ipn: C175 37-11
• compatible year: 1991 1990 1989 1988
• core charge: Free No Core Charge
• position: Rear Outer
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine National Differential Pinion Repair Sleeve

shipping differentialsdepo:

• service: standard, expedited
• transit: 2-7 days
• class: standard, expedited
• type: fixed

general differentialsdepo:

• category: Auto Parts > Transmission Drivetrain > Differentials, Assemblies > Additional

seller differentialsdepo:

• # reviews: 659274
• city: indianapolis, indiana
• rating: 99.6%

returns differentialsdepo:

• paid by: seller
• time: 30 days
• policy: returns accepted

offer differentialsdepo:

• price: $36.13
• item condition: New
• sold #: 7
• started: may 20, 2026
• options: ship-to-home
• in stock #: 1
• availability: in stock

payments differentialsdepo:

• credit card: discover
• other
• wallet: paypal