BDFHYK Oxygen Sensor Upstream O2, Compatible with BMW X5 2007-2010 l6 3.0L, 17094, 11787540166 Replacement 1PCS

17094 BMW X5 O2 Sensor Replacement for 2007–2010 3.0L

This BDFHYK upstream oxygen sensor is an OE-style aftermarket replacement for selected 2007–2010 BMW X5 3.0L L6 applications that match 17094, 11787540166, 11787558081, or the listed interchange reference. For a BMW X5 O2 sensor replacement, verify the original sensor number and the upstream exhaust location. The verified application is associated with the cylinders 4–6 side, so do not substitute it for the opposite pre-catalyst sensor without confirming the part number.

17094 BMW X5 3.0L Fitment

17094 BMW X5 Upstream Oxygen Sensor Position

• Vehicle: BMW X5
• Model years: 2007–2010
• Engine: 3.0L L6 gasoline
• Position: Upstream, cylinders 4–6 application
• Interchange references: 17094; 11787540166; 11787558081; 17091
• Package: 1 sensor

Diagnosing the 17094 BMW X5 O2 Sensor

A stored fault code or Check Engine Light does not prove that the upstream oxygen sensor has failed. Inspect the connector, harness routing, heater power and ground where applicable, exhaust leaks, and related engine-running conditions before replacing parts. Confirm the sensor location from vehicle-specific service information because similar-looking sensors may be used in different positions.

How to know which O2 sensor is bad on a multi-bank exhaust requires identifying the affected bank or cylinder group from service information and scan data. Compare the sensor part number before removal because the adjacent upstream sensor may use a different lead length or reference.

Installing the 17094 BMW X5 Upstream O2 Sensor

• Allow the exhaust system to cool completely before removal.
• Compare the old and replacement sensors before installation, including the OE reference, connector, lead routing, and physical configuration.
• Use an O2 sensor socket or suitable wrench; avoid impact tools on the sensor.
• Start the sensor by hand to reduce the risk of cross-threading the exhaust bung.
• Use anti-seize only when permitted by the sensor instructions, and keep compounds away from the sensing element.
• Route the harness away from hot exhaust surfaces, sharp edges, and moving parts, then tighten to the vehicle-specific specification.