Harley-Davidson Oxygen Sensor 27683-07 / 932-12003, FY stable signal output, smoother riding

Harley-Davidson oxygen sensor 27683-07 / 932-12003, FY stable signal output; smoother riding; installed on the exhaust manifold or pipe, monitors oxygen in exhaust and reports to the ECU to adjust the air-fuel ratio for maximum engine efficiency. Fits Harley-Davidson 2007–2013 Touring, Softail, and Dyna, and some GM models (e.g., 234-5075, 234-4483). Installation difficulty moderate; expect 30–60 minutes; avoid thread damage or excessive strain on sensor harness.