Mann-Filter HU 816 x premium oil filter insert for BMW X3 F25 sDrive 20i (N20 B20 A petrol engine). Cylindrical cartridge element measuring 74 mm diameter × 41 mm inner diameter × 79 mm height, supplied with gasket and seal. Designed for use inside aluminium housings on modern BMW inline engines. Mann-Filter is a German OE-supplier to BMW, Mercedes, and Volkswagen — HU 816 x delivers genuine original-equipment filtration quality, trusted for its multi-stage filter media that captures ultra-fine particles while maintaining optimal oil flow. Recommended replacement interval: every 15,000 km or 12 months.