The primary upstream oxygen sensor (also known as an Air/Fuel Ratio Sensor) for 2012–2021 Honda models with 1.8L and 2.0L engines is commonly identified by the OEM part number 36531-R1A-A01. This sensor is a critical component for maintaining proper fuel efficiency and engine performance by monitoring the exhaust gases before they reach the catalytic converter.
Key Specifications
Sensor Type: Air/Fuel Ratio (Upstream).
Placement: Front, Upper, or Upstream position.
Connector: 4-wire female connector.
Main Manufacturer: Denso is the original equipment manufacturer (OEM) for most Honda oxygen sensors