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Oil Filler/Breather Cap

Critical For Operation

Engine

Seals the engine’s oil filler neck and allows venting of crankcase gases.

The oil filler/breather cap seals the oil filler neck to prevent oil leaks and provides a vent for crankcase gases to escape, maintaining proper engine pressure and preventing buildup of contaminants.

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Typical part cost
$10–$40🔒
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Typical labor cost
$50–$100🔒
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Typically lasts
100,000–200,000 mi
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Or about
7.0–10.0 years
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DIY difficulty
2/10

⚠️ Owners Often Notice

If the Oil Filler/Breather Cap is starting to fail, these are the signs owners most commonly report before it gets worse:

Oil leaks
Engine pressure issues
Rough idling
Engine knocking

Related Services

Services commonly performed on or around this part.

Replace Oil Filler/Breather Cap

No standard interval on file

Clean Oil Filler/Breather Cap

No standard interval on file

Inspect Oil Filler/Breather Cap

No standard interval on file