Dyson DC33 Upright Pre-Filter Assembly CMMR-QD and door frames

and door frames

Tip: replace the belt every 6 to 12 months

while the micro and exhaust filters gradually clog with the fine dust that slips past

this assembly also fits the Eureka SL4410A and Sanitaire SL4410A

Dyson DC33 Upright Pre-Filter Assembly CMMR-QD and door framesThe Dyson DC33 pre filter assembly is a replacement pre motor filter for the DC33 upright and related models. It mounts ahead of the motor, trapping fine dust that gets past the cyclone before that air reaches the motor. A pre motor filter loaded with dust restricts airflow, which raises motor temperature and cuts suction, and can eventually trip the thermal shutoff. Fitting a clean assembly protects the motor and brings suction back to full. Fits: