Parts for your 2018 Toyota Land cruiser-Knock sensor

2018 Toyota LandCruiser knock sensor — what it does and when to sort it

Based on Toyota’s technical documentation (Toyota Global Service Information/TIS repair manuals for the J200 platform) and the Toyota Electronic Parts Catalogue for the 2018 model year, the LandCruiser 200 Series is fitted with knock sensors across its available V8 engines. The 5.7‑litre 3UR‑FE petrol and the 4.5‑litre 1VD‑FTV twin‑turbo diesel both use block‑mounted piezoelectric knock sensors (one per bank) and the engine ECUs monitor them with DTCs such as P0327/P0332. So yes — a knock sensor is absolutely relevant on a 2018 Toyota LandCruiser.

The knock sensor’s job is simple but critical: it listens for abnormal combustion “pinging” and lets the ECU nip it in the bud. On the petrol V8, the ECU will trim ignition timing and fuelling to protect the engine. On the diesel V8, the signal helps the ECU refine injection events to keep combustion noise and stress in check. The result is smoother running, better power and economy, and longer engine life — especially when towing, off‑roading, or running in hot Aussie and Kiwi conditions.

They’re not a routine service item, but they do deserve attention during bigger jobs. For the 3UR‑FE, access typically involves removing the intake manifold, plan on new gaskets and follow the factory torque spec for the sensor and its stud/bolt. For the 1VD‑FTV, access is tighter around intake and EGR plumbing — again, correct torque and loom routing matter. Genuine‑quality sensors are strongly recommended, cheap copies can read “deaf” or oversensitive.

• Common signs of trouble: check‑engine light with P0327/P0332, noticeable pinging under load, lethargic performance, heavier fuel use, or the ECU pulling timing.
• Good servicing habits: keep coolant and oil away from the connectors, check the sub‑loom for heat/abrasion damage, and never over‑tighten — incorrect torque can kill a good sensor.
• Replacement tips: replace per bank if access is involved, inspect the harness clips, clear fault codes, and road‑test under load to confirm the ECU’s knock correction is active.

If the LandCruiser is working hard — towing caravans, hauling gear, or sand‑driving — a healthy knock sensor system is cheap insurance. Sorting a lazy sensor now beats rebuilding a V8 later.

FAQs

Does the 2018 LandCruiser have one or two knock sensors?
Most 2018 LandCruiser 200s run two — one per bank on the V8 block — on both the 3UR‑FE petrol and the 1VD‑FTV diesel. That gives the ECU bank‑by‑bank control.

Is it safe to drive with a faulty knock sensor?
The ECU often dials back performance to protect the engine, so it may feel flat and drink more fuel. Short trips might be possible, but it’s unwise to keep driving — get it diagnosed and repaired to avoid engine damage.

Where is the knock sensor located?
They’re bolted to the engine block. On the petrol V8, they sit under the intake manifold in the valley. On the diesel V8, they’re mounted on the block near the intake/EGR hardware. Access usually needs manifold or plumbing removal.