Honda K20C1 Knock Sensor 30530-RPY-G01

Honda K20C1 Knock Sensor (PN: 30530-RPY-G01)

If your K20C1 starts pulling timing, feeling flat up top, or throwing a knock sensor code, don’t ignore it. The Honda K20C1 knock sensor, the Honda 30530-RPY-G01 sensor, listens for the vibration signature that comes with detonation. When it hears knock, the ECU backs ignition timing off to keep your pistons and ring lands out of the danger zone. That protection is great, but a bad Civic Type R knock sensor can also make your car feel slow because the ECU can’t trust the signal.

This is the K20C1 OEM knock sensor, Honda K20C1 part 30530-RPY-G01, and it fits the factory location with the factory plug. You’ll see it used as the FK8 Civic Type R knock sensor for 2017–2021, the FL5 Civic Type R sensor for 2023 and up, and the Acura Integra Type S sensor for 2022 and up. Same deal across all of them, it acts as a critical Civic Type R engine sensor and K20C1 engine sensor for proper knock detection.

We run OEM sensors on our own cars when we want the ECU to get clean, predictable data, especially on tuned setups where false knock means you give up power for no reason. If you’re doing maintenance, a rebuild, or chasing a timing pull issue, a genuine Honda knock sensor like this Type R knock detection sensor is the boring part that saves you from expensive noise. Call it a Honda engine vibration sensor if you want, but the point is simple, solid data keeps timing where it should be, and your Acura K20C1 knock sensor signal needs to be right.

Key Features

• Genuine Honda knock sensor for K20C1 applications
• Part Number: 30530-RPY-G01
• Reads engine vibration patterns associated with detonation so the ECU can adjust ignition timing
• Fits K20C1 platforms including 2017–2021 Honda Civic Type R FK8, 2023+ Honda Civic Type R FL5, and 2022+ Acura Integra Type S DE5
• Direct OEM fitment, factory location, factory connector
• Helps maintain power and reliability by keeping knock control working correctly
• Smart replacement during maintenance, engine rebuilds, or troubleshooting timing pull and knock related issues