Makita 140A19-4 — Switch Circuit Complete. Genuine Makita replacement switch assembly that restores the trigger/switching function on compatible cordless impact driver/drill models; supplied as a complete switch circuit unit (pre‑assembled with terminals and mounting points) ready to fit into the XAD03-style handle.

Fits example models such as GAD01M1, GAD01Z, GAD02M1, GAD02Z, GGD01M1, GGD01Z and the XAD03/XGD01 series (XAD03PT, XAD03Z, XGD01PT, XGD01Z) — listed as the Switch Circuit Complete for those tool assemblies. This item is listed among Makita spare parts for the XAD03 .

Use this original Makita switch circuit to return crisp trigger response and correct electrical switching behavior; it’s the direct replacement described in parts diagrams and intended to keep your power tool parts functioning safely and reliably. Confirm the part number 140A19-4 matches the one called out in your tool’s parts list before fitting.

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