BMW E81 E87 120d N47 Panel Air Filter BMC 12-0509/03

BMC 12-0509/03 panel filter for the E81/E87 120d - built for the N47 diesel, not the N47D20 or N47D16. Fits cleanly in the stock airbox. No trimming. No adapters. Just a higher-flow, washable cotton gauze element inside BMC’s petrol-resistant rubber frame with alloy mesh support.

• Stage 1 fast road or daily driver upgrade - airflow gain is real, but subtle; filtration remains ISO 5011 compliant
• Search terms this actually matches: BMW 120d N47 air filter, E87 120d panel filter, E81 120d intake filter, N47D20 air filter, BMC 12-0509/03, diesel 120d high flow filter
• Not for N57, not for 118d (N47D16), not for 123d - those need different part numbers
• Clean every 15,000 miles with BMC cleaner and oil; lasts 3-5 years with proper maintenance