SPI Noise / Knock Sensor for Ski-Doo 2017-2018 850 ETEC Replaces OEM# 420664031

SPI Noise / Knock Sensor for Ski-Doo

This SPI noise/knock sensor replaces OEM part number 420664031 and monitors engine knock on Ski-Doo 850 ETEC snowmobiles from 2017-2018.

Overview

This SPI noise/knock sensor is a direct replacement for Ski-Doo 850 ETEC snowmobiles. It detects abnormal engine vibrations to prevent detonation and protect the engine. The sensor is built to match OEM specifications for a precise fit and reliable performance.

Built For Performance

• Direct fit replacement for OEM# 420664031
• Detects engine knock with high sensitivity
• Durable construction for extreme cold conditions
• Easy plug-and-play installation
• Restores peak engine performance
• Compatible with 2017-2018 Ski-Doo 850 ETEC

Fits These Machines

• for Ski-Doo 850 ETEC (2017-2018)

On-The-Job Use

• Monitoring engine knock during deep snow riding
• Preventing engine damage in high-performance conditions
• Replacing a failed sensor on touring snowmobiles
• Ensuring smooth operation in varying temperatures
• Quick diagnostic replacement for check engine light

Specs At A Glance

Good To Know

Q: What is the function of a knock sensor? A: It detects engine detonation and sends a signal to the ECU to adjust timing.

Q: How do I know if this sensor is compatible? A: This SPI sensor is designed for 2017-2018 Ski-Doo 850 ETEC models with OEM# 420664031.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.