Mating connectors can be found on Civics and probably other Hondas, even if they weren't lean burn. Try looking at: the headlight harness, near the brake master cylinder/booster (yellow wires with different color traces), on the passenger side fender near the firewall, 90 accord distributor connector The original manufacturer of the connector is Sumitomo. This connector is from the HW Sealed Series 090 Some vehicles may have 2 or more, as witnessed by Brian Renegar: I found two connectors for the wideband O2 on a 92 Honda Civic. This was a plain old Civic (no VTech). One connector was right next to this engine's O2 sensor connector. It used a 3 or 4 wire (NB sensor probably) O2, but the wideband connector (or one like it) was on the harnesses also. I found the other connector on the driver's side shock tower, near the firewall.