• Honda 30531-RCA-A01 Genuine Knock Sensor Sub-Wire
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Honda

Honda 30531-RCA-A01 Genuine Knock Sensor Sub-Wire

Honda 30531-RCA-A01 Genuine Knock Sensor Sub-Wire

$42.38
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✔ Honda 30531-RCA-A01 Knock Sensor — Genuine OEM Part
✔ Fitment: J-series V6 engines (3.0L / 3.5L) in Accord, Odyssey, Pilot, Ridgeline, Acura TL, RL, MDX
✔ Direct replacement for factory knock sensor — no modifications required
✔ Manufactured to Honda's original specifications and tolerances
✔ Includes mounting bolt and crush washer — ready to install

 

Honda 30531-RCA-A01 Genuine Knock Sensor — for J-Series V6 Engines (3.0L / 3.5L)

A check engine light with codes P0325 or P0330, sluggish acceleration, poor fuel economy, or a metallic "pinging" noise from the engine under load — these are common signs that your knock sensor is failing. The knock sensor detects abnormal engine vibrations (knock or pinging) caused by detonation and sends a signal to the ECU to adjust timing. A faulty sensor can lead to reduced performance, engine damage, and increased emissions. Replacing it with this genuine Honda sensor restores proper engine timing and protects your engine.

This is a factory-original Honda knock sensor (OE part number 30531-RCA-A01) for J-series V6 engines. It is engineered with a piezoelectric ceramic element that accurately detects engine knock across all RPM ranges. This is the same part sold at Honda dealerships.

 

When to Replace


• Check engine light with codes P0325 or P0330 (knock sensor circuit malfunction)
• Sluggish acceleration or reduced power under load
• Poor fuel economy (decreased MPG)
• Metallic "pinging" or "knocking" noise from the engine under heavy load
• Engine runs rough or misfires intermittently
• The sensor is damaged, cracked, or has a broken connector

Product Details & Highlights


• ✔ Genuine Honda OEM part — not an aftermarket or Chinese replica
• ✔ Piezoelectric ceramic sensor — accurately detects engine knock vibrations
• ✔ Direct bolt-on replacement — no modifications or adapters needed
• ✔ Includes mounting bolt and crush washer — complete kit
• ✔ Made from heat-resistant materials — withstands high engine bay temperatures
• ✔ Backed by Honda’s manufacturer warranty (valid through any authorized dealer)

Package Contents


• 1 × Honda 30531-RCA-A01 knock sensor (genuine)
• 1 × mounting bolt
• 1 × crush washer

FAQ

FAQ

Is this a genuine Honda part or a copy?
This is 100% genuine Honda OEM — in original factory packaging with Honda part number printed on the label. It is not an aftermarket brand or a replica.

Does this fit my 2008 Honda Accord with the 3.5L V6?
Yes — your 8th-gen Accord with the J35Z engine uses this knock sensor. We recommend verifying with your VIN for absolute certainty.

What's the difference between 30531-RCA-A01 and 30531-RDA-A01?
RDA-A01 is the superseded part number for some later models. Both sensors are functionally identical and interchangeable. Please check your original part number to confirm.

How do I know if my knock sensor is bad?
Check for error codes P0325 / P0330, sluggish acceleration, poor fuel economy, or metallic pinging under load. You can also test the sensor with a multimeter — it should show a specific resistance value (refer to your service manual).

Does this come with the mounting bolt?
Yes — the mounting bolt and crush washer are included. No separate purchase is required.

Will this fit my Honda CR-V?
No — CR-V uses 4-cylinder K-series engines. This knock sensor is for J-series V6 engines only.

Can I install this sensor myself?
Yes — it is a direct bolt-on replacement. However, we recommend consulting your vehicle's service manual for the correct torque specification (typically 20–25 Nm).

What is the torque spec for installation?
The recommended torque is usually 20–25 Nm (15–18 ft-lbs). Do not overtighten — the sensor housing can crack.

California Residents

WARNING

Cancer and Reproductive Harm.

www.p65warnings.ca.gov

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