Parts for your 2017 Toyota Crown-Knock sensor

2017 Toyota Crown knock sensor — what it does and how to look after it

Yes, the 2017 Toyota Crown uses a knock sensor. Technical references including the Toyota factory Repair Manual for the S210 series (2013–2018) and the Toyota Electronic Parts Catalogue list knock sensors across the 4GR-FSE 2.5 V6, 2GR-FSE 3.5 V6, 8AR-FTS 2.0 turbo, and 2AR-FSE hybrid variants. The manual details ECM strategies and fault codes P0325/P0330 for knock sensor circuits, confirming the part is fitted and monitored by the ECU.

The knock sensor’s job is to “listen” for engine knock (that sharp ping under load) and let the ECU trim ignition timing to protect the engine while keeping power and economy tidy. On the V6 GR engines there are typically two sensors (one per bank), while the 8AR-FTS and 2AR-based hybrids use a single sensor. It’s a simple piezo sensor bolted to the block, but it’s critical for smooth running, efficiency and engine longevity.

As part of routine servicing, a knock sensor isn’t a scheduled replacement item, but a quick visual once-over under the bonnet is worth it:

• Check the harness and connector for oil contamination, hardening or chafing.
• If the intake or cooling system is off, confirm the sensor is clean and correctly torqued. Over- or under-tightening can skew readings. Follow the factory torque spec for the specific engine.
• Keep an ear out for persistent pinging, a check engine light, sluggish performance or poor fuel economy—common symptoms when the ECU has to pull timing due to a faulty signal.

Replacement is straightforward in principle but access varies. On the V6 Crowns, the sensors sit in the “V” under the intake manifold, plan on removing the intake assembly and replacing gaskets. On the 8AR-FTS, access down the side of the block can be tight. Use genuine or high-quality OEM-equivalent sensors, keep the mating surface spotless, and route the loom exactly as per the manual to avoid picking up false vibration. No special relearn is typically needed—clear codes, verify there’s no detonation under load, and confirm live data and fuel trims look normal.

Good fuel is part of the equation too. Running the recommended octane and keeping the cooling system healthy helps the Crown’s knock control do its best work, especially on the turbo 8AR-FTS.

Does the 2017 Toyota Crown actually have a knock sensor?

It does. Toyota’s Repair Manual for the S210 Crown and the Toyota EPC show knock sensor fitment across the 4GR-FSE, 2GR-FSE, 8AR-FTS and 2AR-FSE engines. The ECU watches the sensor(s) and can log DTCs like P0325 or P0330 if there’s a circuit or performance fault.

What are the signs of a dodgy knock sensor on a 2017 Crown?

Common giveaways are a check engine light, lacklustre acceleration, higher fuel use, and sometimes a metallic ping under load. The ECU often retards timing to protect the engine, so it can feel flat, especially climbing hills or overtaking. Scan for relevant fault codes to confirm.

Is it safe to drive with a faulty knock sensor?

Not ideal. The ECU will usually pull timing to keep things safe, which dents performance and economy. On turbo 8AR-FTS cars, prolonged driving with an unresolved knock sensor fault risks increased engine stress. Best to diagnose and repair promptly.