Replacement Polaris O2 Sensor - 12mm

Replacement Polaris O2 Sensor - 12mm

Keep your engine running at peak efficiency with a high-quality replacement 12mm oxygen sensor! As an essential engine management component, the O2 sensor constantly measures exhaust gas air-fuel ratios and provides feedback to your ECU to trim fuel delivery dynamically.

Instead of bypassing or deleting a faulty sensor, replacing it with this high-precision 12mm sensor restores crisp throttle response, optimal air-fuel ratios, and peak horsepower output. Given how sensitive UTV engines are to fuel delivery, this sensor is a cost-effective alternative to expensive dealer replacements—making it an ideal spare to carry in your tool kit on the trail.

Directly replaces factory Polaris OEM part number #4016021.

Fitment Verification Note:

⚠️ SENSOR SIZE VERIFICATION: This sensor features a 12mm thread body. It does NOT fit wideband O2 sensor models (blue lead casing) found on 2019–2021 RZR Turbo or Pro XP / Turbo R platforms. Please verify your machine's existing sensor thread diameter prior to ordering on 2019–2020 models.

Features:

• Optimum Engine Performance: Constantly monitors air-fuel ratios to allow ECU fuel trimming for optimal power, smooth idling, and engine protection.

• Cost-Effective OEM Alternative: Delivers precision sensing and fast response without the high dealership markups.

• Essential Trail Spare: Quick drop-in replacement to solve check-engine lights, limp mode, or rich/lean conditions on the trail.

• Direct Plug-and-Play Fitment: Features factory-style connector weather seals and correct harness length for clean cable routing.

What's Included:

• (1) RPM SXS Replacement 12mm Oxygen (O2) Sensor

Fitment:

Fits 2-Seat, 4-Seat, and Crew variations across the following Polaris platforms equipped with the 12mm O2 Sensor:

Polaris RZR Models:

• Polaris RZR XP 1000 / XP 4 1000: 2015–2017

• Polaris RZR XP Turbo / XP Turbo 4: 2016–2018 (and select 2019–2020 models with 12mm threads)

• Polaris RZR Turbo S / Turbo S 4: 2018 (and select 2019–2020 models with 12mm threads)

• Polaris RZR S 1000 / Trail S 1000 (All Models): 2015–2021

Polaris General & Ranger Models:

• Polaris General / General 4 (All Models): 2016–2021

• Polaris Ranger 900 & 1000 Models: Various 2015–2021 applications