Makita 140B49-1 Spare Part - SWITCH COMPLETE DTD171

Makita 140B49-1 — Switch Complete (original Makita replacement). A direct-replacement switch assembly used to restore power, variable speed and forward/reverse control on compatible Makita impact drivers. It’s the complete trigger/switch module (black plastic housing with metal contacts) marked as part 140B49-1 and sold as a genuine Makita switch.

Key details you’ll want to know before swapping it in:
- Designed for Makita impact drivers commonly referenced under model families XDT16 and the TD161D/TD171D series (examples: XDT16, TD161D, TD161DZ, TD171D and similar variants).
- Internal switch element often shown as an Omron C3JW-1A-1 (6507723), so the assembly uses a reliable micro‑switch inside the housing.
- Electrical/physical notes found in listings: functions include forward/reverse and multi‑speed control; the module has both a 2‑pin and a 4‑pin connector arrangement on the harness. The trigger face dimensions listed in product specs are about 14.9 mm wide and 23.6 mm high (converted from 0.585" × 0.930"). Materials shown are plastic body with steel/copper contact parts.

Why this part matters: replacing a worn or faulty 140B49-1 switch complete restores crisp trigger response, reliable direction switching and the tool’s original speed control without rewiring or fabricating adapters. It’s supplied as the full switch assembly so you swap the module rather than individual microswitches.

This is the genuine Makita 140B49-1 Switch Complete

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