Mann Filter cartridge oil filter HU 721/4 x for BMW 335d & X5 xDrive35d — cartridge replacement with drain plug gasket, OE-level f

MANN-FILTER HU 721/4 x cartridge oil filter with matching oil drain plug gasket is a direct-fit replacement engineered to restore OE-level oil filtration for BMW 335d (2009–2011) and X5 xDrive35d (2009–2013).

Designed for modern diesel engines, this MANN-FILTER cartridge element combines high dirt-holding capacity, resilient sealing components, and filter media tuned to the original equipment specification. The cartridge design retains oil in the module for faster lubrication at start-up and lets you replace only the inner element rather than the entire housing—helping reduce waste and service time while maintaining consistent filtration performance across the service interval.

How does this cartridge filter match my BMW's requirements?

The HU 721/4 x is built to the dimensional and filtration standards used by European automakers, ensuring compatible fit and flow characteristics. Its media and end-cap construction are selected to deliver the particle retention and oil flow your BMW engine expects.

• Dimensional fit for BMW 335d (2009–2011) and X5 xDrive35d (2009–2013)
• Media porosity matched to OE specifications for diesel applications
• End caps designed to seal correctly in the OEM housing
• Includes oil drain plug gasket for a proper oil change seal

What benefits will I notice after installation?

After installing this cartridge, you should see consistent oil flow and effective contaminant capture across normal driving conditions. The retained oil in the cartridge housing helps with faster lubrication at cold starts, reducing initial friction until the engine reaches operating temperature.

• Reliable particle retention for extended engine protection
• Faster oil delivery on start-up due to cartridge design
• Long-lasting O-ring flexibility for leak-free sealing
• Reduced waste because only the cartridge is replaced

How durable is the filter under tough driving conditions?

MANN-FILTER media and components are engineered to remain stable under thermal and mechanical stress typical of modern diesel engines. The material choice provides high resistance to pressure changes and contaminants so filtration performance remains consistent until the next scheduled service.

• High dirt-holding capacity minimizes pressure build-up
• Stable media resists collapse or deformation
• O-rings stay flexible to maintain sealing over time
• End caps prevent bypass and ensure full media use

Can I install this myself and what else do I need?

Installation is straightforward for anyone familiar with oil service on these BMW models: remove the filter housing cap, extract the old cartridge, fit the new cartridge and O-ring, and replace the drain plug gasket during oil change. Use the correct torque values and follow manufacturer safety procedures when lifting and supporting the vehicle.

• Tools: filter cap socket, torque wrench, oil drain pan
• Replace the drain plug gasket included with this kit
• Verify oil level after refilling and running engine briefly
• Follow BMW service interval recommendations for oil and filter

Who is this for? This MANN-FILTER HU 721/4 x cartridge plus drain plug gasket is aimed at DIY enthusiasts, independent technicians, and fleet managers who service BMW 335d (2009–2011) and X5 xDrive35d (2009–2013) vehicles and want an OE-quality replacement element. If you prioritize accurate fit, proven media stability, and the convenience of replacing only the cartridge during oil service, this part provides a practical, OE-grade option.