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Brake Master Cylinder Cap

Critical For Operation

Brakes

Seals the master cylinder reservoir to prevent contamination.

The brake master cylinder cap covers and seals the brake fluid reservoir, preventing dirt, moisture, or debris from entering the system and contaminating the brake fluid.

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Typical part cost
$5–$20🔒
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Typical labor cost
$50–$100🔒
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Typically lasts
80,000–150,000 mi
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Or about
5.0–10.0 years
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DIY difficulty
3/10

⚠️ Owners Often Notice

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

Brake fluid contamination
Brake fluid leaks
Poor braking performance
Soft brake pedal
Brake failure
No braking

Related Services

Services commonly performed on or around this part.

Replace Brake Master Cylinder Cap

No standard interval on file

Inspect Brake Master Cylinder Cap

No standard interval on file