Oxygen Sensor for Honda Foreman Rubicon Rancher 36531-HR3-A22 36531-HR3-A21 Heated Magnetic Induction

Upgrade your Honda ATV’s exhaust monitoring with the Honda Foreman Rubicon Rancher Oxygen Sensor (part numbers 36531-HR3-A22 / 36531-HR3-A21). This heated, magnetic-induction O2 sensor is designed to deliver precise readings of the exhaust gas Lambda and the air–fuel ratio, helping your engine maintain optimal combustion, fuel economy, and smoother idle. Built for reliability, it’s a direct replacement part engineered to match the specifications of Honda TRX models from 2014 to 2020, including the Rancher, Foreman, and Rubicon lines.

Key advantages include quick sensor response thanks to its heating type design, and durable construction suitable for ATV environments. Whether you’re tuning performance for trail riding or aiming for steady fuel efficiency, this sensor helps your ECU regulate the air–fuel mix accurately, reducing emissions while maintaining power delivery. It’s a genuine-feel upgrade that fits alongside OEM specifications, minimizing installation hassles and downtime.

Compatibility is broad within the TRX lineup: 2014–2020 Honda TRX 420 Rancher, 2015–2016 Honda TRX 500 Rancher, 2015–2020 Honda TRX 500 Foreman, and 2015–2020 Honda TRX 500 Rubicon. This ensures you can source a single, reliable sensor that covers multiple popular models, simplifying maintenance and part management for your Honda fleet.

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Benefits & Tips

• Address fuel efficiency and emissions by ensuring the engine receives accurate oxygen-sensor feedback for optimal air–fuel ratio control.
• Verify fitment before ordering: this sensor covers 2014–2020 Honda TRX 420 Rancher and 2015–2020 Honda TRX 500 series (Foreman, Rancher, Rubicon) with part numbers 36531-HR3-A22 or 36531-HR3-A21.
• During installation, ensure a clean mounting surface and proper connection to the harness to avoid intermittent readings and ECU hesitation.

Product specifications

• Part Numbers: 36531-HR3-A22, 36531-HR3-A21
• Sensor Type: Magnetic Induction
• Type: Heating Type
• Measuring Range: Air Fuel Ratio Sensor; Exhaust gas Lambda/O2 Oxygen Sensor
• OEM No.: 36531-HR3-A22, 36531-HR3-A21
• Fitment: 2014–2020 Honda TRX 420 Rancher; 2015–2016 Honda TRX 500 Rancher; 2015–2020 Honda TRX 500 Foreman; 2015–2020 Honda TRX 500 Rubicon
• Warranty: 2 Year Replacement Warranty
• Origin: Mainland China

Package includes:

• 1 pcs

Warnings / Reminders

Before ordering, please check product pictures, accessories and part numbers. If you are unsure, please send us a product picture or part number before ordering. In order to avoid wrong orders, please read the purchase guide carefully. thank you!