Parts for your 2017 Subaru Impreza-Crank angle sensor

2017 Subaru Impreza crank-angle-sensor (crankshaft position sensor)

Yes, the 2017 Subaru Impreza absolutely uses a crank-angle-sensor—more commonly called the crankshaft position (CKP) sensor. This is documented in the Subaru Factory Service Manual for the 2017MY Impreza (engine diagnostics for the FB-series engine) and shows up in the Subaru electronic parts catalogue as a dedicated sensor. It’s also referenced in standard OBD-II fault coverage for this model with codes like P0335/P0336. So if someone’s wondering whether it’s relevant on this car, it is—without it, the engine won’t run.

On the 2.0-litre FB-series engine in the 2017 Impreza, the crank-angle-sensor tracks the exact position and speed of the crankshaft. The engine control module uses that signal to fire the spark, time the fuel injection, and coordinate with the cam sensors for variable valve timing. It’s the heartbeat signal for the whole engine. A dodgy or dead CKP sensor will give hard starting, random stalling, uneven idle, misfires, or a no-start under the bonnet light—often with the check engine light and a stored code.

There’s no routine maintenance for the sensor itself, it’s a sealed magnetic unit. As part of servicing, it’s worth a visual once-over: check the harness that runs across the back of the engine for rubbing, heat damage, or oil contamination, and make sure the connector is clean and latched. Avoid blasting that area with a pressure washer. Oil leaks or debris around the bellhousing area can creep into connectors over time, so keeping things tidy helps.

If replacement’s on the cards, it’s a straightforward job for a competent DIYer or workshop: disconnect the battery, locate the sensor at the rear/top of the engine near the bellhousing, remove the retaining bolt, ease the sensor out, lightly lube the new O-ring, refit, and torque to the workshop spec. Clear any stored codes and let the car idle to stabilise—there’s typically no programming required on this model. Using a genuine or high-quality aftermarket sensor is a smart move, poor-quality units can cause intermittent signal dropout that’ll drive anyone spare. If symptoms persist after replacement, inspect the trigger wheel and wiring, and pull live data to confirm a clean RPM signal.

• Common symptoms: hard starting, stalls when hot, rough idle, no-start, P0335/P0336.
• Good practice: inspect wiring and connectors during regular services, fix oil leaks early.

FAQs

Does the 2017 Subaru Impreza actually have a crank-angle-sensor?
Yes. Subaru labels it the crankshaft position sensor in the factory service information for the 2017 Impreza. It’s essential for spark and fuel timing, and the car will usually not start if it fails.

What are the signs the crank-angle-sensor is failing on a 2017 Impreza?
Expect long cranking, random stalling (especially warm), rough idle, misfires, and a check engine light with codes like P0335/P0336. If it dies outright, the engine will crank but won’t fire.

Can it be driven with a faulty crank-angle-sensor?
Not reliably. It may run poorly or stall without warning, and it may refuse to restart. It’s best to diagnose promptly and replace the sensor to avoid getting stranded.