BDFHYK Oxygen Sensor Upstream O2 Sensor, Compatible with Ford 2009-2011 E-150/ E-250/ E-250, Compatible with Lincoln 2010 MKS/MKT/MKZ, Compatible with Mercury Mariner/Milan, 17475 Replacement 1PCS

This BDFHYK upstream O2 sensor is an OE-style aftermarket replacement for verified Ford, Lincoln, Mazda, and Mercury applications that cross-reference 17475 and the listed interchange numbers. Before ordering, confirm the exact year, model, engine, original sensor number, upstream exhaust location, connector, terminal arrangement, wiring, lead length, and emissions configuration. A Check Engine Light or stored OBD-II code alone does not prove that the oxygen sensor has failed.

17475 Upstream O2 Sensor Fitment for Ford, Lincoln, Mazda and Mercury

The full verified application list also includes selected Expedition, Flex, Fusion, Taurus, Navigator, and Mazda Tribute applications. Match the engine and original sensor before ordering.

17475 O2 Sensor Interchange References

Replacement references include 17475, ZZDA18861, DY-1120, DY-1165, 234-5113, 24348, 250-25049, OS5526, 8F9Z9F472B, 8F9Z9F472D, 8F9Z9F472H, BA5Z9F472B, BA5Z9F472C, C1BZ9F472B, and FJ7Z9F472A. Confirm the interchange number together with vehicle and connector details.

17475 Upstream Sensor Position Check

This SKU is listed for an upstream oxygen-sensor application. Do not assign a universal Bank 1 Sensor 1 or Bank 2 Sensor 1 label from the upstream description alone; bank numbering depends on the engine and exhaust layout.

17475 O2 Sensor Diagnosis Before Replacement

Inspect the connector, wiring, heater circuit, related fuse, power and ground, exhaust leaks, intake or vacuum leaks, fuel pressure, injector operation, misfires, and other engine-control inputs. Catalyst-efficiency or fuel-trim codes should be diagnosed before replacing parts.

17475 O2 Sensor Installation Notes

• Allow the exhaust system to cool before service.
• Use an O2 sensor socket or suitable wrench.
• Compare the connector and lead length with the removed sensor.
• Inspect the bung threads and start the sensor by hand.
• Use anti-seize only when permitted by the sensor instructions.
• Tighten to the applicable vehicle service specification and route the harness away from heat and moving parts.

17475 O2 Sensor Package Contents

• 1 × BDFHYK oxygen sensor

Important: This is an OE-style aftermarket replacement, not a factory-branded part.