Original Makita 126188-9 — Gear Assembly for DDF459 / BDF459 series.
Complete gearbox (gear assembly) that replaces the internal gearset used in the two‑speed transmission of the 18 V DDF459 / BDF459 ; it’s part reference 14 on the diagram.
Direct, drop‑in replacement for the DDF459 and BDF459 models — restores correct gear engagement and shifting without modification.
Compatible with the 13 mm keyless‑chuck versions of these drills and designed to mate to the motor pinion inside the housing; it supports the tool’s two‑speed ranges (low ~0–400 min⁻¹, high ~0–1,500 min⁻¹).
If you need the original Makita gearbox to restore smooth shifting and reliable torque delivery in a DDF459 / BDF459 drill, the 126188-9 is the correct replacement part.
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