Bosch Diagnostics / Bosch KTS diagnostic testers
Introduced in 1988, the KTS 300 was an early handheld multi-make ECU diagnostic tester, widely nicknamed the Bosch Hammer. Bosch says its initial data covered engine management for three manufacturers and that it remained in the range until 1999.
Software and connection equipment varied with the vehicle and era. The Porsche 9288 was a Porsche-specific derivative of the same early handheld concept, with its own cartridge and connectors; see the Porsche page for the distinction.
Related pages
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- Bosch: 25 years of KTS diagnostic testers. Robert Bosch GmbH, 2013. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.
- Porsche RJ: evolution of Porsche diagnostic systems. Porsche RJ; Portuguese, illustrated history. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.
- Bosch press photograph: KTS 300 and later tester. Photo: Bosch; editorial reproduction permitted with credit. Source revision page or document reviewed 2026-11-10; accessed 2026-11-10.