
Manufacturer reference: 9901 — O₂ Sensor FEULING PARTS
Replacement lambda sensor designed for road and classic exhausts. This 18 mm O₂ sensor combines a stabilised zirconium oxide ceramic body and gas-permeable platinum electrodes, with a porous ceramic layer to limit erosion caused by exhaust contaminants. Made in the United States and designed to meet or exceed original specifications, it integrates with engine management systems to provide reliable oxygen measurements.
Ideal for vintage/classic and road/touring motorcycles, this sensor is particularly suitable for several Harley-Davidson models (e.g. FLSTSE2, FXDWG, FXDF 2011). It helps maintain an accurate exhaust reading, which is useful for proper air/fuel mixture management and stable engine mapping. For secure installation, check the 18 mm thread and 2-wire supply on your vehicle before installation.