Brake Fluid Reservoir Cap 58531-2B500 | Car Oil Tank Cover

Brake Fluid Reservoir Cap – OEM Fit Replacement (58531-2B500 / 5853107000)

Keep your vehicle's braking system sealed and performing at its best with this direct-fit Brake Fluid Reservoir Cap. Engineered as a precise replacement for OEM part numbers 58531-2B500 and 5853107000, this cap provides a secure, leak-resistant seal for your brake fluid oil tank — an essential component for safe and reliable vehicle maintenance.

Key Features

• OEM Part Numbers: 58531-2B500 / 5853107000
• Material: Durable ABS plastic for long-lasting performance
• Size: Approximately 6.3 cm / 2.48 in diameter
• Condition: 100% brand new, high quality
• Package Includes: 1 or 2 pieces (see variant selection)
• Color: As shown in product images
• Direct replacement — no modification required for compatible vehicles

Why Replace Your Brake Fluid Reservoir Cap?

A damaged, cracked, or missing brake fluid reservoir cap can allow moisture and contaminants to enter your braking system, reducing fluid effectiveness and potentially compromising your vehicle's stopping performance. Replacing a worn cap with this quality ABS unit is a quick, affordable, and important part of regular vehicle upkeep.

Fitment Notes

Please verify compatibility with your vehicle's make, model, and year before ordering. Cross-reference OEM part numbers 58531-2B500 and 5853107000 to confirm fitment. Due to manual measurement, a ±5 mm deviation may exist. Slight color variation from product images may occur due to lighting conditions.

Made in China.

Learn More About Brake System Maintenance

For guidance on brake system care and vehicle safety, visit the National Highway Traffic Safety Administration (NHTSA) or review brake fluid safety information at CPSC.gov.

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Frequently Asked Questions

Q: What vehicles are compatible with the 58531-2B500 brake fluid reservoir cap?

A: This cap is designed to match OEM part numbers 58531-2B500 and 5853107000. Please cross-reference these part numbers with your vehicle's make, model, and year to confirm compatibility before purchasing. When in doubt, consult your owner's manual or a certified mechanic.

Q: What material is this brake fluid reservoir cap made from?

A: The cap is constructed from durable ABS (Acrylonitrile Butadiene Styrene) plastic, which is resistant to heat and automotive fluids, making it a reliable choice for long-term use in your vehicle's braking system.

Q: How many pieces come in the package?

A: Depending on the variant you select at checkout, the package includes either 1 or 2 brake fluid reservoir caps — great for keeping a spare on hand for future maintenance needs.

Q: Is this an OEM or aftermarket part?

A: This is a brand-new aftermarket replacement part engineered to meet OEM specifications for the listed part numbers (58531-2B500 / 5853107000), offering a cost-effective alternative to dealer-sourced components.