This is a used engine wiring harness from a 1991 Mazda RX7 convertible (with air bag) and connects the ECU to the sensors and injectors on the engine. It fits engines with either manual or automatic transmissions. The plastic electrical connectors are in really good condition, showing no signs of brittle damage from heat. The plastic end to the coolant sensor connector is missing, but the electrical spade connector for it is still intact. Please note that this harness includes the blue and orange connectors for the impact sensors which only came on 89-91 convertibles with air bags.