Knock sensor Honda genuine 30530-PPL-A01

The original knock sensor 30530-PPL-A01 is a factory Honda part used in many petrol engines from the K-series. Its role is to detect combustion vibrations inside the engine block and provide accurate feedback to the ECU, allowing precise ignition timing corrections. This ensures proper performance, smooth operation, fuel efficiency, and protection against detonation.

The updated part number 30530-PPL-A01 replaces the earlier sensor 30530-PNA-003. Both references are fully interchangeable in Honda service documentation.

Fitment – Honda K-series petrol engines

This knock sensor is used in a wide range of models equipped with K-series engines:

• Honda Accord Sedan (2003–2008)
• Honda Accord Tourer (2003–2008)
• Honda Civic 5D (2004–2005)
• Honda CR-V (2002–2005)
• Honda FR-V (2005–2006)
• Honda Stream (2001–2005)

Because some markets received slightly different wiring and intake layouts, VIN verification is always recommended before purchase.

Why choose the original Honda knock sensor?

The knock sensor is a highly precise piezoelectric component. Cheap aftermarket replacements often:

• trigger the ECU fault code P0325,
• cause incorrect ignition timing correction,
• reduce engine power and responsiveness,
• increase fuel consumption,
• fail to protect the engine from detonation.

The OEM Honda sensor provides:

• correct piezo signal characteristics for the ECU,
• stable readings across temperature ranges,
• proper ignition timing control under load,
• maximum engine protection during hard acceleration.

Symptoms of a faulty knock sensor

• ECU fault code P0325 – Knock Sensor Circuit Malfunction,
• loss of power and poor throttle response,
• higher fuel consumption,
• uneven engine operation under load,
• metallic knocking noises during acceleration (in severe cases).

Installation notes

• the mounting surface on the engine block must be clean and flat,
• do not apply sealants, grease, or washers under the sensor,
• check connector condition and wiring before installation,
• tighten according to the Honda torque specification for the specific engine.

FAQ – Knock Sensor 30530-PPL-A01

Does 30530-PPL-A01 fit every K-series engine?
Not every single one, but it fits many popular K-series engines found in Accord, Civic, CR-V, FR-V and Stream. To avoid mismatches, verifying compatibility by VIN is recommended.

Is it safe to drive with a faulty knock sensor?
The engine usually runs, but the ECU switches to a safe ignition map with heavily retarded timing. This reduces performance and increases fuel usage, while long-term driving may lead to detonation-related damage.

What is the difference between 30530-PPL-A01 and 30530-PNA-003?
PPL-A01 is the updated Honda part number and replaces the older PNA-003. Both work identically and are interchangeable.

Do aftermarket knock sensors work correctly?
In most cases – no. Cheap aftermarket sensors frequently cause the P0325 fault to return or produce inaccurate readings. For knock control, OEM is strongly recommended.

Where is the knock sensor located?
It is threaded into the engine block, typically under or near the intake manifold. Access varies by model but usually requires removing intake components.

Should I use silicone or thermal paste during installation?
No. The sensor must be installed dry. Any additional layer between the sensor and the block will distort vibration readings.

The P0325 code persists after replacement – what now?
Check:
– wiring and connector condition,
– correct torque and mounting surface,
– ground connections,
– whether a genuine OEM sensor was installed.