Original Bosch on/off switch (P/N 2607200664), direct replacement switch used in Bosch corded hammer/drill models. This is the factory Bosch switch assembly sold as a single genuine Bosch part and corresponds to the part shown as position No. 4 on the GSB 21-2 RE parts diagram.

Why it helps: if your drill won’t power on, has intermittent cut-out, or the trigger feels dead, this original Bosch switch restores correct on/off control and fitment without modifying the tool — it’s the same switch Bosch specified for the GSB 21-2 RE.

Key identifiers you can check before ordering: Bosch part number 2607200664, EAN 4059952262055, manufactured for Bosch.

Example Bosch models this part is listed to fit (check the 10‑digit type on your tool to confirm):

- GSB 21-2 RE (GSB21-2RE / GSB 21 RE) — Type series 3 601 A9C 500.

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