Subaru PCV Valve 11810AA141 for Forester XT 2014–2018 & WRX 2015–2021 OEM — Direct Fit, Turbo Engine

Genuine Subaru PCV valve 11810AA141 engineered to replace the crankcase ventilation control valve on Forester XT 2.0 Turbo (2014–2018) and WRX models (2015–2021).

This OEM control valve regulates crankcase pressure and recirculates blow-by gases back into the intake on turbocharged Subaru engines. Built to factory specifications, part number 11810AA141 restores proper PCV function and matches Subaru's original fit, finish, and valve timing, making it a direct replacement without modification. Installing the correct valve helps the engine breathe as intended by the manufacturer and supports emission controls and turbocharger longevity when maintained properly.

How will this Subaru PCV valve affect engine performance?

Replacing a failing or worn PCV valve with the genuine 11810AA141 helps maintain stable crankcase pressure and reduces oil vapor entering the intake tract. That stability can prevent rough idle, decrease oil consumption, and reduce carbon buildup on intake components.

• Restores designed crankcase ventilation flow for smoother idling.
• Limits oil mist reaching intake and turbocharger components.
• Maintains emissions control behavior to factory standards.

Is this part a direct fit for my Subaru Forester XT or WRX?

Yes—this is an original equipment manufacturer (OEM) Subaru control valve with part number 11810AA141. It is produced to match the dimensions and connectors of the factory-installed valve so it installs in the same location without adapters.

• Fits Forester XT 2.0 Turbo model years 2014–2018.
• Fits WRX model years 2015–2021.
• No modifications required; sockets and clips align with factory mounts.

When should I replace the PCV valve and what are the signs of failure?

Replace the PCV valve if you notice oil in the intake, increased oil consumption, a rough or fluctuating idle, or a check-engine light related to crankcase ventilation codes. Periodic inspection during routine maintenance helps catch early wear before secondary issues develop.

• Visible oil in intake hoses or intercooler piping.
• Unexplained oil loss or smoky blow-by.
• Rough idle, hesitations, or ventilation-related diagnostic trouble codes.

How do I install the OEM Subaru PCV valve?

Installation is straightforward for a home mechanic with basic tools: locate the valve on the rocker cover or intake tract, disconnect the vacuum hose and electrical connector if present, remove the retaining clip, and replace with the OEM part. Always follow torque specs and inspect nearby hoses for deterioration while replacing the valve.

• Disconnect battery and relieve intake pressure before starting.
• Remove clamps and retaining clips in factory order to avoid damage.
• Check and replace any brittle vacuum hoses or seals during service.

Who this part is for: Owners and technicians servicing turbocharged Subaru Forester XT (2014–2018) and WRX (2015–2021) who want a like-for-like replacement that matches factory specifications. Choose this genuine Subaru 11810AA141 control valve if you prefer OEM fitment, reliable performance, and the confidence of a Subaru-numbered part when addressing crankcase ventilation issues during routine maintenance or repair.