Parts for your 2015 Toyota Crown-Knock sensor

2015 Toyota Crown knock sensor — is it fitted and what does it do?

Based on Toyota factory technical sources, the 2015 Toyota Crown (S210 series: GRS210/ARS210/AWS210/GWS214) is equipped with knock sensors. Toyota’s Repair Manual on TIS for the SFI/engine control system details the knock sensor and related diagnostics (e.g., DTCs P0324/P0325 Knock Sensor/Knock Sensor Circuit). The Toyota Electronic Parts Catalog for these model codes also lists “Sensor, Knock” for the petrol engines used (8AR‑FTS, 4GR‑FSE, 2AR series, 2GR‑FSE). These sources confirm the knock sensor is relevant and used on the 2015 Toyota Crown.

On the 2015 Toyota Crown, the knock sensor is the quiet achiever that helps the engine run smoothly and efficiently. Its job is to “listen” for knock (pinging) — tiny pressure spikes caused by abnormal combustion. When it hears that tell‑tale rattle, it signals the ECU to trim ignition timing and protect the engine. That means better drivability on everyday 91–98 RON fuels around Aus and NZ, improved fuel economy, and a safer buffer against engine damage when conditions get a bit harsh.

Most 2015 Crown variants run one or two knock sensors depending on the engine layout. Inline‑fours (like the 8AR turbo and 2AR) typically use a single sensor, while V6 engines (like the 2GR/4GR) usually have two — one per bank. They’re mounted to the block to pick up vibration accurately, which is why correct fitment and torque are so important.

There’s no routine replacement interval, so they’re generally left alone until there’s a problem. Signs to watch for include a check‑engine light with codes such as P0325, lacklustre power, rough running, higher fuel use, or audible pinging under load. If those pop up, a proper scan and diagnostic test is the first step — don’t just throw parts at it.

When replacement is actually needed, go for quality (genuine Toyota or OEM supplier like Denso), and follow the factory torque spec and tightening method. On some Crowns, access can be fiddly — a V6 may need the intake manifold off — so factor in fresh gaskets and a new harness clip or two. After refit, clear the codes, check for loom damage, and do a road test so the ECU can relearn. Keeping to good‑quality petrol, fixing vacuum or intake leaks promptly, and ensuring engine mounts and brackets are snug all help the sensor do its best work under the bonnet.

• Use OEM‑quality sensors and new gaskets where disturbed.
• Route and clip the harness exactly as per the manual.
• Verify with a scan tool: no pending DTCs after a hot road test.

Does the 2015 Toyota Crown have a knock sensor?

Yes. Factory manuals and the Toyota parts catalogue list knock sensors on the S210 Crown’s petrol engines. Depending on engine, there may be one (I4) or two (V6).

What symptoms point to a bad knock sensor on a 2015 Crown?

Common clues are a check‑engine light (often P0325), sluggish performance, poor fuel economy, and sometimes audible pinging under load. Always confirm with a scan and wiring checks before replacing the sensor.

Is knock sensor replacement a DIY job on this model?

On some engines it’s straightforward, on others (especially V6 variants) access can require removing the intake manifold. If you’re not set up with torque specs, a scan tool, and new gaskets, it’s worth handing to a pro.