BDFHYK Oxygen Sensor Upstream Downstream O2, Compatible with Dodge Charger RAM 1500, Compatible with RAM 1500 Classic 2500 3500, 18125, 0085426218 Replacement 1PCS

This BDFHYK O2 sensor is an OE-style aftermarket replacement for verified Ram, Dodge, Jeep, Mercedes-Benz, and Volkswagen applications that cross-reference 18125 and the listed OE numbers. Sensor position varies by application, so confirm the exact year, model, engine, original sensor number, exhaust location, connector, wiring layout, lead length, and emissions configuration before ordering. Some vehicles named in older listing data are not included below because a reliable year/engine match was not confirmed. A stored code alone does not prove sensor failure.

18125 O2 Sensor Fitment for Ram, Dodge, Jeep, Mercedes-Benz and Volkswagen

The verified application set also includes selected 2004 Dodge Dakota/Durango and 2015 Mercedes-Benz GL450/ML400 applications. Match the exact engine and original sensor before ordering.

18125 O2 Sensor Interchange References

Replacement references include 18125, 0085426218, 56028994AA, 68144248AD, and 7B0906262B. An interchange-number match should be confirmed together with vehicle, connector, and exhaust position.

18125 Sensor Position Check by Application

The verified cross-fit includes different upstream or downstream positions depending on application. Do not assign a universal Bank/Sensor location. Confirm the removed sensor, OE reference, connector, and vehicle-specific service information.

18125 O2 Sensor Diagnosis Before Replacement

Inspect wiring, connector condition, heater circuit, related fuse, power and ground, exhaust leaks, intake or fuel-control faults, injectors, misfires, and catalyst operation before replacement. Fuel-trim and catalyst-efficiency codes require system diagnosis.

18125 O2 Sensor Installation Notes

• Allow the exhaust system to cool before service.
• Use an O2 sensor socket or suitable wrench.
• Compare the connector, lead length, and original sensor number before installation.
• Inspect 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.

18125 O2 Sensor Package Contents

• 1 × BDFHYK oxygen sensor

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