Dorman 265-851 Transmission Oil Pan

Dorman 265-851 Transmission Oil Pan

Replace the factory-style transmission pan on select BMW applications with this Dorman OE FIX transmission oil pan. It features a serviceable filter for easier future maintenance, plus the gasket, drain plug, and mounting hardware needed for a complete service-ready installation.

Key Features

• Plastic transmission oil pan with black finish
• Serviceable filter design for future transmission service
• Drain plug included for cleaner fluid changes
• Gasket or seal included
• Mounting hardware included
• One-piece pan and one-piece gasket configuration
• Fits select BMW 128i, 328i, 335i, 528i, X5, X6, and related models

Product Details

Dorman 265-851 is a transmission oil pan built for select BMW vehicles where the factory transmission fluid filter requires pan replacement during service. This OE FIX design adds a serviceable filter to simplify future maintenance and reduce repeat replacement of the entire pan assembly. The pan is made from plastic, measures 11.8 inches wide, and includes a drain plug with 24 mm drain thread diameter for fluid service. It also includes the gasket/seal and mounting hardware needed for installation. This part cross-references ATP B-408 for the same application.

Compatible With BMW applications including 2006-2011 323i, 2006-2011 325i, 2006-2011 325xi, 2006-2011 328i, 2007-2008 328xi, 2009-2013 328i, 2011-2013 328i xDrive, 2007-2011 335i, 2009-2011 335i xDrive, 2004-2010 530i, 2008-2010 535i, 2009-2010 535i xDrive, 2007-2010 X5, and 2008-2010 X6. Dorman 265-851 is also listed for 2010-2013 BMW 128i and 2010-2012 BMW 740i.

Common Service Issues It Can Address

• Cracked or leaking transmission pan
• Damaged drain plug threads or seepage at the drain point
• Service intervals that require replacing the original pan/filter assembly
• Fluid loss from a worn gasket or seal surface
• Repeated transmission service costs tied to non-serviceable factory pan designs

Installation Notes

Drain the transmission fluid before removing the original pan. Clean the mating surface thoroughly and inspect the transmission for debris or damage before installing the new pan. Follow the vehicle-specific fill procedure and fluid specification for the BMW model being serviced. Verify fitment by year, model, and transmission configuration before installation.

Quality Assurance

Dorman OE FIX parts are engineered to address common service limitations in original equipment designs while maintaining application-specific fitment. This transmission oil pan is built for direct replacement use on the listed BMW models and includes the components needed for a complete service installation.