Original Makita cleaner/air‑filter cover — part number 5503500300. Injection‑molded replacement cover that snaps/seats over the air‑filter housing to keep dust, grass and debris away from the carburettor and air element, restoring the correct intake seal and mounting surfaces for the filter and its holder. Fits the Makita RBC525 , RBC525E and RBK525G as listed in the parts breakdown.

This cover pairs with the air filter (part 5103502700) and the air‑filter holder (part 5503500400) and is secured using the 4×30 mm screw shown in the parts diagram (screw reference 4×30 / 911156‑3), which is listed separately in the parts listing.

If your original cover is cracked, warped or missing the mounting features, replacing it with this genuine Makita 5503500300 restores proper fit and protection for the air cleaner assembly so the engine breathes clean.