Genuine 33121213949 Differential Pinion Seal

BMW Differential Pinion Seal

This Genuine differential pinion seal, part number 33121213949, is a direct-fit sealing component for BMW driveline service. It is used at the pinion area of the differential to help maintain proper lubricant retention in the axle assembly.

Key Features

• Genuine OE replacement differential pinion seal
• Part number 33121213949 for accurate ordering and service matching
• Compatible with a wide range of BMW M models and performance applications
• 50 x 8 x 9 notes listed in fitment data
• Fits BMW M3, M4, M5, M6, M6 Gran Coupe, 1 Series M, Z4, and select 7/8/5 Series applications

Detailed Description

Genuine 33121213949 is a BMW differential pinion seal used in driveline and axle sealing systems. This seal is listed for multiple BMW performance and luxury models, including BMW M3, BMW M4, BMW M5, BMW M6, and BMW Z4 applications, along with select 840Ci, 850Ci, 540i, 740i, 740iL, 750iL, and 850CSi vehicles. If you are servicing a BMW differential and need the correct pinion seal by part number, 33121213949 provides a direct reference for fitment matching.

This part cross-references no additional part numbers in the provided data.

What It Is Used For

• Replacing a leaking differential pinion seal
• Addressing gear oil seepage at the pinion input area
• Restoring differential sealing during driveline service
• Supporting maintenance on BMW M3, M5, M6, and related BMW rear axle assemblies

Installation Notes and Tips

Confirm the differential application and seal dimensions before installation. Inspect the pinion yoke, shaft surface, and surrounding sealing area for wear or damage, and replace any worn mating components as needed. Proper installation and correct torque procedures are important to maintain a reliable seal on BMW differential service jobs.

Quality Assurance

Genuine parts are built to OE specifications for the listed BMW applications. Part number 33121213949 is identified for direct fitment use in the vehicles shown below.

Compatible With

• Fits 2015-2016 BMW M3, N/A
• Fits 2008-2013 BMW M3, N/A
• Fits 2001-2006 BMW M3, N/A
• Fits 2015-2016 BMW M4, N/A
• Fits 2013-2016 BMW M5, N/A
• Fits 2006-2010 BMW M5, N/A
• Fits 2000-2003 BMW M5, N/A
• Fits 1991-1993 BMW M5, N/A
• Fits 1988 BMW M5, N/A
• Fits 2012-2016 BMW M6, N/A
• Fits 2006-2010 BMW M6, N/A
• Fits 1987-1988 BMW M6, N/A
• Fits 2014-2016 BMW M6 Gran Coupe, N/A
• Fits 2011 BMW 1 Series M, N/A
• Fits 2006-2008 BMW Z4, N/A
• Fits 1996-1997 BMW 840Ci, N/A
• Fits 1993-1997 BMW 850Ci, N/A
• Fits 1994-1995 BMW 540i, N/A
• Fits 1994-1995 BMW 850CSi, N/A
• Fits 1993-1994 BMW 740i, N/A
• Fits 1993-1994 BMW 740iL, N/A
• Fits 1988-1994 BMW 750iL, N/A