Mechanic Wiki is an online automotive reference created to help professional mechanics and do-it-yourself car owners understand repair, diagnostics, programming, and routine maintenance. Its guides cover a broad range of vehicle makes and topics, with step-by-step instructions and practical information intended to support work in the garage. Readers can explore automotive diagnostics, OBD scanner procedures, ECM and PCM programming, key and key fob programming, oil and maintenance resets, TPMS, and other service tasks.

The site also publishes model-specific advice, including maintenance schedules, replacement procedures, reliability information, fuel economy tips, and service cost guides. Its extensive topic library includes vehicle key programming across many manufacturers, as well as content related to Launch X431 equipment and odometer topics. Mechanic Wiki is run by Erwin C.

Salarda, whose background includes installation, training, and after-sales support for automotive service equipment, particularly OBD scanners and wheel alignment systems. The website describes its material as educational and presents itself as a helpful digital reference for automotive repair and maintenance