Parts for your 2013 Subaru Legacy-Crank angle sensor

2013 Subaru Legacy crank-angle-sensor — what it does and when to replace it

Based on technical sources, the 2013 Subaru Legacy does use a crank-angle sensor. Subaru’s factory service information for the 2010–2014 Legacy/Outback platform (BR/BN) details a crankshaft position sensor used by the engine control module, and the diagnostic section lists related fault codes P0335–P0339. Genuine Subaru parts catalogues for the FB25 2.5‑litre and EZ36 3.6‑litre engines also show a dedicated crankshaft position (crank‑angle) sensor fitted to this model.

On the 2013 Legacy, the crank‑angle sensor keeps the engine computer in the loop about exactly where the crankshaft is and how fast it’s spinning. That timing info is critical for spark and fuel delivery, smooth idle, and quick starts on a cold morning. If the signal goes missing or messy, the car can be hard to start, may stall at the lights, or simply won’t fire at all.

For day‑to‑day servicing, the sensor isn’t a scheduled replacement item. It’s more of a “replace on condition” part. Still, it pays to check the basics under the bonnet: make sure the wiring to the sensor isn’t chafed, oil‑soaked, or loose, and that connectors are clean and properly latched. If the check engine light pops up with codes like P0335, P0337 or P0338, or the tacho jumps about while cranking, the sensor or its wiring deserves a look.

Replacement is a straightforward job for a competent DIYer or any workshop. The sensor is bolted to the block and reads a toothed wheel on the crank. Usual steps are disconnect the battery, unplug the connector, remove a single retaining bolt, twist the sensor free, and install the new one with a light smear of clean engine oil on the O‑ring. Don’t force it, a nicked O‑ring can cause an oil weep. Always seat the connector fully and route the loom away from hot or moving parts.

If the car has racked up lots of kilometres, intermittent stalling or random no‑starts can point to a tired crank sensor, especially once warm. Using a quality OEM‑equivalent part is smart—cheap copies can give weak signals and trigger repeat faults. After fitting, clear any stored codes and verify a clean crank signal with a scan tool. Look after the basics and this little sensor will keep the Legacy running sweet as.

• Common symptoms: hard starting, stalling, misfires at low speed, no‑start, erratic tacho, check engine light (P0335–P0339).
• Good practice: inspect wiring/connectors at services, replace on fault, not on a set interval.

FAQs

Where is the crank‑angle sensor on a 2013 Subaru Legacy?
It’s mounted on the engine block and reads a toothed reluctor on the crankshaft. Access typically involves removing nearby intake ducting or the airbox for room, then unplugging the connector and removing a single retaining bolt. Exact orientation can vary slightly between the 2.5‑litre and 3.6‑litre engines.

What are the signs the crank‑angle sensor is failing?
Common giveaways include long crank times, random stalling once warm, a dead tacho during cranking, and a check engine light with codes like P0335, P0337 or P0338. In some cases the engine won’t start at all because the ECU can’t see crank position.

Is it safe to drive with a dodgy crank‑angle sensor?
Not really. It may run intermittently, then cut out without warning, which isn’t ideal in traffic. If the fault is logged, it’s best to organise testing and replacement promptly to avoid a no‑start situation and potential roadside drama.