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PCV Valve Diaphragm

Critical For Operation

Engine

Controls the flow of crankcase gases through the PCV valve.

The PCV valve diaphragm helps regulate the flow of gases through the PCV valve, ensuring proper ventilation of crankcase gases and preventing buildup of pressure and harmful emissions in the engine.

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Typical part cost
$10–$40🔒
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Typical labor cost
$50–$150🔒
🛣️
Typically lasts
100,000–200,000 mi
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Or about
7.0–10.0 years
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DIY difficulty
3/10

⚠️ Owners Often Notice

If the PCV Valve Diaphragm is starting to fail, these are the signs owners most commonly report before it gets worse:

Rough idling
Engine knocking
Poor fuel economy
Check engine light

Related Services

Services commonly performed on or around this part.

Replace PCV Valve Diaphragm

No standard interval on file

Inspect PCV Valve Diaphragm

No standard interval on file