In the world of automotive diagnostics, the name Delphi (now part of BorgWarner after the spin-off of its aftermarket division) carries significant weight. Known for producing high-quality OEM (Original Equipment Manufacturer) parts and diagnostic software, Delphi’s tools are essential for professional mechanics and serious DIY enthusiasts. Among the various firmware and software versions circulating in online forums and repair shops, Delphi 100 251 Rev 1.0 is a specific identifier that often raises questions.