Honda 30531-RCA-A01 Knock Sensor

✔ 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.

OEM Part Numbers
• 30531-RCA-A01
• 30531-RDA-A01 (superseded — check compatibility)

Vehicle Fitment Table (OEM Compatibility)

⚠️ Important Fitment Notes:

• Always verify by VIN – Fitment is determined by the engine code (J-series), not just the model year. Some vehicles listed above also came with 4-cylinder (K-series) engines that are not compatible.

• Supersession – Part 30531-RCA-A01 is superseded by 30531-RDA-A01 on some later models. Both are functionally identical, but please confirm your original part number.

• Includes mounting hardware – This sensor comes with the required mounting bolt and crush washer. No additional hardware is needed for installation.

• Double-check your original part – Before ordering, confirm the part number stamped on your old knock sensor or run your VIN through a Honda OEM parts catalog for absolute certainty.

When to Replace (Common Symptoms)
• 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 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)

Condition
New (100% genuine Honda packaging)

Product Type
Knock Sensor (engine vibration / detonation sensor)

Function
The knock sensor monitors engine vibrations caused by detonation (pre-ignition). When it detects abnormal knocking, it sends a voltage signal to the Engine Control Unit (ECU), which then retards ignition timing to prevent engine damage. This helps maintain optimal performance and fuel efficiency while protecting the engine.

Applications
This knock sensor fits J-series V6 engines (J30A, J32A, J35A, J35Z) found in Honda Accord, Odyssey, Pilot, Ridgeline and Acura TL, RL, MDX from approximately 2003 through 2017. It is not compatible with 4-cylinder K-series or R-series engines.

Important: Always use the VIN (Vehicle Identification Number) to confirm compatibility with your specific vehicle. If in doubt, send us your VIN before ordering and we'll verify for you.

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

Technical Specifications

Warranty
Honda's original manufacturer warranty applies. For claims, please contact your nearest Honda authorized dealer with your proof of purchase. Warranty terms may vary by region — contact us before purchase if you need a warranty confirmation.

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.