BDFHYK Oxygen Sensor Downstream O2, Compatible with Acura MDX RDX RL RLX TL, Compatible with Honda Accord Crosstour Accord Crosstour, 18031, 36532R70A01 Replacement 1PCS

This BDFHYK downstream O2 sensor is an OE-style aftermarket replacement for verified Acura and Honda applications that cross-reference 18031 and the listed OE numbers. Before ordering, confirm the exact year, model, engine, original sensor number, downstream exhaust location, connector, wiring layout, lead length, and emissions configuration. Some applications use different downstream locations, so left/right or front/rear placement should be confirmed with vehicle-specific service information rather than inferred.

18031 Downstream O2 Sensor Fitment for Acura and Honda Applications

The verified application set also includes selected Acura RL, TSX, ZDX and Honda Crosstour configurations. Match the exact vehicle and original sensor before ordering.

18031 O2 Sensor Interchange References

Replacement references include 18031, 36532R70A01, 36532R71L01, 36532R72A01, 36532RGWA02, 365425G1A01, 36542R70A01, 36542R71L01, and 36542RKGA01.

18031 Downstream Sensor Position Check

This SKU is listed for downstream use, but the exact exhaust location can differ by engine and vehicle. Do not infer Bank 1 Sensor 2, Bank 2 Sensor 2, left, right, front, or rear without service information for the exact application.

18031 O2 Sensor Diagnosis Before Replacement

Inspect wiring, connector condition, heater power and ground, related fuse, exhaust leaks, fuel-control faults, misfires, and catalyst operation before replacement. Catalyst-efficiency codes do not automatically identify a failed downstream oxygen sensor.

18031 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 service specification and route the harness away from heat and moving parts.

18031 O2 Sensor Package Contents

• 1 × BDFHYK oxygen sensor

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