If you have spent any time in the world of heavy-duty or passenger car diagnostics, you know the name . The Bosch KTS 540 is a legendary piece of kit—a rugged, modular diagnostic interface that bridges the gap between old-school OEM systems and modern multi-brand workshops.

Using the application bundled with ESI[tronic], technicians can switch the module's firmware from standard Bosch mode to PassThru mode.