BMW E82 E88 135i BMC High-Flow Panel Air Filter - Part Number BMC 135I

For the E82 and E88 135i - specifically the N54-powered cars, not N55 - this BMC panel filter replaces the stock paper unit in the factory airbox. It’s a genuine fast road or track day upgrade: more airflow, sharper throttle response, and repeatable filtration without remapping.

• Fitment is precise: designed for E82/E88 135i with N54 engine only - not compatible with N55, F20, or F21 chassis
• Stage 1 friendly: often paired with intake ducting mods or decat downpipes on N54 stage 1 and stage 2 builds
• Reusable and serviceable: clean with BMC solution, re-oil, and refit - no need to buy new filters every 12k miles
• Search terms covered: BMW 135i N54 air filter, E82 air filter, E88 panel filter, BMC 135I, N54 fast road intake, track day air filter, reusable air filter for 135i, high flow panel filter BMW