If you're attempting to connect an older Porsche model with a pre-OBDII port to modern diagnostic tools, you'll need the Porsche 19 Pin OBD cable adapter. This adapter has a male 19-pin connector on one end, which connects to the vehicle, and a female 16-pin OBDII plug on the other end, which connects to a male 16-pin OBDII plug on the majority of contemporary diagnostic tools. This adapter allows accurate diagnostic readings by bridging the gap between old and new technology. The Porsche 19 Pin OBD cable adapter is a useful addition to any Porsche owner's or mechanic's toolkit due to its durable construction and compact design.