MANN-FILTER HU 721/4 Cartridge Oil Filter with Drain Plug Gasket for BMW 335d (2009-2011) & X5 xDrive35d (2009-2013)

Premium filtration for European engines

The MANN-FILTER HU 721/4 cartridge oil filter with an integrated drain plug gasket is designed for today’s European engines. It blends high dirt-holding capacity with robust material resistance and a filter fineness tuned to the needs of the target vehicle models. The cartridge design helps keep oil in the module, enabling faster oil delivery during starts and reducing friction at startup, which can contribute to smoother engine behavior under repeated cold starts.

Key design advantages at a glance

Cartridge filters like this one are chosen to match the filtration precision required by European nameplates. The end caps are engineered to establish an optimal seal for the full service life of the filter, while the O-rings stay flexible to maintain a reliable seal through varying temperatures and operating conditions. The filter media remains stable and functional even under demanding conditions, supporting consistent filtration performance without needing to replace the housing during service life.

• Outstanding dirt-holding capacity that helps keep oil clean under demanding driving conditions
• Durable filter media remains functional under extreme temperatures and loads
• Optimum end caps and flexible O-rings for a reliable, long-lasting seal
• Cartridge design eliminates the need to replace the entire housing during service
• OE-quality filtration compatible with BMW models

Why it matters for BMW drivers

For BMW enthusiasts, this HU 721/4 solution supports engine cleanliness and targeted protection in a compact cartridge that suits European applications. It is compatible with select vehicles, including BMW 335d (2009-2011) and X5 xDrive35d (2009-2013). While results can vary with driving style and maintenance, the design emphasizes reliable filtration across service intervals and real-world driving scenarios.

In practice, you may notice more straightforward maintenance when paired with the right housing, along with the benefit of a cartridge that is designed to deliver consistent filtration performance over time. Always confirm fitment for your exact year and model to ensure the best match for your vehicle’s lubrication system.