Parts for your 2013 Subaru Impreza-Crank angle sensor

2013 Subaru Impreza crank-angle sensor

Yes, the 2013 Subaru Impreza is fitted with a crank-angle sensor, more commonly called the crankshaft position (CKP) sensor. This is confirmed in Subaru’s factory service information for the FB20 engine used in MY12–MY16 Impreza, which details CKP signal diagnosis and synchronisation with the camshaft sensor. OEM parts catalogues for the 2013 Impreza also list a crankshaft position sensor for this model. So it’s very much relevant to engine operation on this car.

On the 2013 Impreza, the crank-angle sensor monitors the crankshaft’s exact position and speed. The engine control module uses this signal to time fuel injection and spark, coordinate with the cam sensor for sequential injection, and detect misfires. If the sensor drops out, the engine may crank without starting, cut out intermittently, or log fault codes and go into a protective strategy. It’s a small part with a big job—keeping the boxer engine running smoothly and efficiently.

There’s no set replacement interval, but as part of routine servicing it’s smart to give the sensor and its wiring a quick once-over. Look for oil contamination, damaged insulation, loose connectors, or corrosion at the plug. If a check engine light appears with codes like P0335–P0339, or the Impreza shows hard starting when hot, random stalling, or a sudden loss of rev signal, the CKP is high on the suspect list.

Replacement is usually straightforward. Under the bonnet, disconnect the battery negative, locate the sensor at the front of the engine near the timing cover, unplug the connector, remove the retaining bolt, and lift the sensor out. Fit the new unit carefully—don’t strike or shim it—and route the loom the same way it came out. Tighten the retaining bolt to the factory torque spec, reconnect the plug and battery, clear any codes and check idle quality. A short road test with live data to verify stable crank RPM and no new faults is good practice.

Tech tips worth noting:

• Always use quality or genuine sensors, cheap copies can give weak or noisy signals.
• Keep the magnetic tip clean—metal filings can distort the waveform.
• If faults persist, check for damaged trigger wheels or wiring continuity before condemning the ECU.

FAQs

Where is the crank-angle sensor on a 2013 Subaru Impreza?
On FB20-powered models, it’s mounted at the front of the engine by the timing chain cover, typically below or near the alternator area. Access is from the top, removing the intake snorkel/ducting makes the plug and retaining bolt easier to reach.

What are common symptoms or codes of a failing CKP sensor?
Hard starting, intermittent stalling, a dead tach during crank, and a check engine light are typical. The ECU may store P0335–P0339 range/performance or circuit codes. Failures often show up when hot, then worsen over time.

Can it be driven with a bad crank-angle sensor, and what does replacement cost?
It’s not recommended—an intermittent sensor can cause sudden cut-outs or a no-start, which isn’t safe. Parts usually run about AUD/NZD $80–$200 depending on brand, with around 0.5–1.0 hour labour for most workshops.