Parts for your 2016 Toyota Mark x-Crank angle sensor

2016 Toyota Mark X crank angle sensor (crankshaft position sensor)

Per Toyota technical literature, the 2016 Toyota Mark X (GRX130/133) does use a crank-angle sensor—Toyota names it the crankshaft position sensor. The Toyota Repair Manual for the GRX130/133 (Engine: 4GR‑FSE and 2GR‑FSE) in the SFI System section covers the Crankshaft Position Sensor operation, diagnostics (e.g., DTC P0335 series), and removal/installation. The Toyota Electronic Parts Catalogue for GRX130/133 also lists a “Sensor, Crank Position” for both engines. So yes, it’s a relevant, fitted component on this model.

On the Mark X, the crank-angle sensor feeds the engine ECU precise crank speed and angle signals so it can time spark, injection, and variable valve timing accurately. Without a clean signal, the ECU can’t sync fuel and spark, which leads to hard starting, misfires, rough idle, or a stall. Under the bonnet this V6 is tidy, but the sensor itself typically sits low on the block near the transmission bellhousing and reads a toothed reluctor on the crank.

It’s not a scheduled replacement item, but it’s worth a quick look during major services—especially around 60,000–100,000 kilometres—checking the connector for oil ingress, brittle loom, or loose retaining hardware. Oil leaks can track down the block and contaminate the plug, so fixing any rocker cover or front cover weeps helps keep the sensor happy.

Common clues that the sensor is on the way out include:

• Intermittent no-start or long crank when hot
• Random stalling at idle or low speed
• Check Engine Light with P0335–P0339 codes
• Misfire or poor fuel economy

If replacement’s needed, a competent DIYer can handle it with basic spanners and axle stands, though many will prefer a workshop. The gist is:

1. Disconnect the battery negative and remove the engine cover.
2. Access the sensor from underneath, unplug the connector.
3. Remove the single retaining bolt and ease the sensor out (there’s an O‑ring).
4. Lightly oil a new O‑ring, seat the new sensor, and tighten the bolt to the Toyota spec in the repair manual.
5. Reconnect, clear any codes, and verify live data/crank sync.

Genuine or high‑quality aftermarket sensors are recommended, cheap units can give flaky signals. After installation, a quick road test and scan tool check for stable RPM and no stored faults is the go. For most Mark X owners in Australia or New Zealand, this is a once-in-a-blue-moon repair—treat the wiring kindly, keep leaks at bay, and the sensor usually just gets on with the job.

Popular questions about the 2016 Toyota Mark X crank-angle sensor

Where is the crank-angle sensor located on a 2016 Mark X?
It’s mounted low on the engine block, typically at the rear near the transmission bellhousing, reading a reluctor on the crank. Access is usually easier from underneath with the vehicle safely raised. Look for a small, single-bolt sensor with a two- or three-pin connector.

Can the Mark X be driven with a failing crank-angle sensor?
Sometimes it’ll run poorly or stall, and other times it won’t start at all. Driving with a dodgy signal risks sudden stalling, which isn’t safe. If there are P0335-series codes or hot no-start issues, it’s best to address the sensor promptly.

Do both the 2.5L and 3.5L Mark X engines use this sensor?
Yes. Both the 4GR‑FSE (2.5L) and 2GR‑FSE (3.5L) engines rely on the crankshaft position sensor for timing and synchronisation as documented in the Toyota Repair Manual and EPC.