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Fuel Cap

Fuel System

Seals the fuel tank and maintains proper system pressure.

The fuel cap seals the filler neck to prevent fuel vapor from escaping and keeps the fuel system's evaporative emissions loop sealed. A worn seal lets vapor escape and can trigger an emissions fault.

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Typical part cost
$5–$20🔒
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Typical labor cost
$0–$5🔒
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Typically lasts
40,000–80,000 mi
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Or about
4.0–8.0 years
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DIY difficulty
1/10

⚠️ Owners Often Notice

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

Check engine light
Fuel smell near the vehicle
Loose or clicking cap
Failed emissions test

Related Services

Services commonly performed on or around this part.

Replace Fuel Cap(s)

No standard interval on file

Inspect Fuel Cap(s)

No standard interval on file