Parts for your 2018 Subaru Outback-Crank angle sensor

2018 Subaru Outback crank-angle-sensor: what it does, where it is, and when to replace it

For the 2018 Subaru Outback, a crank-angle-sensor is absolutely relevant and fitted. Subaru’s factory service information for the 2015–2019 Outback (BS series) details the Crankshaft Position Sensor (often called a crank angle sensor/CAS) in engine diagnostics, including DTC P0335 and waveform checks. Subaru’s genuine parts catalog for the 2018 Outback lists a “Sensor – Crankshaft Position” for both the 2.5-litre FB25 and 3.6R EZ36 engines. These technical sources confirm the part is standard equipment and critical to engine control.

On this model, the crank-angle-sensor tracks the crankshaft’s exact position and rotational speed. The engine control unit (ECU) relies on that signal for spark timing and fuel injection sequencing, especially on start-up and at low revs. If it goes out of spec, timing accuracy suffers, leading to hard starts, misfires, stalling, or a no-start with the check engine light on.

There’s no scheduled replacement interval for the sensor, it’s a “fit-and-forget” item that’s only replaced if it fails tests or sets relevant fault codes. As part of servicing a 2018-subaru-outback crank-angle-sensor, it’s smart to: keep the connector clean and latched, check the harness for chafing near the engine block, and scan for codes like P0335/P0336 if there are starting or drivability niggles. Heat and vibration over big kilometres can age the sensor, so proactive inspection around known oil leak areas is wise.

• Common symptoms of a failing crank-angle-sensor:
  • Extended cranking, intermittent stalling, or rough idle
  • Loss of power or misfire under load
  • Check engine light with codes such as P0335/P0336

Location varies by engine. On many FB25 cars it’s mounted to the block near the bellhousing where it reads the crank reluctor, on the EZ36 it’s typically at the front timing cover area. Either way, it’s a small, two-wire or three-wire sensor secured by a single bolt with an O-ring. Battery disconnection is recommended before removal. Replacement is straightforward for experienced home mechanics but access can be tight, refer to the Subaru service manual for exact torque values and testing procedures. No special relearn is usually required—once fitted, the ECU will read it straight away.

When replacing the 2018-subaru-outback crank-angle-sensor, use quality OEM or equivalent parts, lightly oil the O-ring, route the harness in the original clips, and clear any stored codes after the repair. A quick road test and live-data check for stable RPM and no pending faults finishes the job nicely.

• Where is the crank-angle-sensor on a 2018 Subaru Outback?

On most 2.5-litre FB25 models it’s mounted on the engine block near the bellhousing, reading a toothed reluctor on the crank. On 3.6R EZ36 engines it’s generally at the front timing cover area. Access can vary with intake ducting and covers, removing the engine cover and using a small ratchet usually helps.

• What are the signs the crank-angle-sensor is failing on this model?

Typical signs include long crank times, intermittent stalling, rough running, or a dead no-start with a check engine light. A scan tool may show codes like P0335/P0336. If the problem is intermittent, lightly wiggling the harness during live-data viewing can expose a poor connection or internal sensor fault.

• Does the crank-angle-sensor need regular servicing or scheduled replacement?

No scheduled interval—it's replaced on condition. During routine servicing, it’s worth checking the connector for oil ingress, ensuring the loom isn’t rubbing on brackets, and confirming there are no relevant stored or pending fault codes. If replacement’s needed, use a quality part and follow the service-manual torque specs.