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A properly functioning brake fluid reservoir is crucial for your vehicle's braking system. It holds the brake fluid, which transmits force to the brakes, and its condition directly impacts safety. Replacing a damaged or leaking reservoir ensures optimal brake performance and prevents costly damage to other brake components.
Universal design - this coolant reservoir is not vehicle-specific, and is designed for convenient use in a variety of applications where a durable reservoir is needed
Thick wall construction - manufactured from quality plastic to withstand heat and vibration
Complete solution - features three mounting holes for installation flexibility, and includes a vented cap
Trustworthy quality - designed in the United States and backed by more than a century of automotive aftermarket excellence
Support available - every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
Universal Compatibility: The master cylinder fluid oil reservoir fits a wide range of vehicles including motorcycles, pit dirt bikes, ATVs, and 4-wheel QUADs. It works with models like Polaris Sportsman, Scrambler, Outlaw, Magnum, and more. Check size...
Durable ABS Construction: The master cylinder fluid oil reservoir is made of high-quality ABS plastic with impact resistance, heat resistance, and low-temperature tolerance. It ensures long-lasting performance in various riding conditions and withstands...
Secure Fluid Containment: The motorcycle rear brake master cylinder oil cup features a sealed design that prevents fluid loss during demanding rides, maintaining consistent pressure for reliable rear brake and clutch performance. It includes housing, cap...
Precise Dimensions: The motorcycle rear brake master cylinder oil cup measures 3.5cm (1.38in) in diameter and 4cm (1.57in) in height. Cap diameter: 42mm (1.65in); handle diameter: 7mm (0.275in). It is sized for proper fit and function in compatible...
Easy Replacement Kit: The complete package includes 1 rear brake master cylinder oil cup with housing and cap. It enables straightforward replacement of old or worn reservoirs, ensuring seamless braking system operation.
Precise Replacement: The brake master cylinder reservoir cap is a direct replacement for OEM part numbers 58531-07000 and 585312B500. Before ordering, carefully verify your vehicle's OEM part number, specific model, and production year to avoid...
Compatible Models: Compatible with Hyundai 1998-2019 Sonata/Hybrid, 1999-2006, 2012-2017 Accent, 2000-2019 Santa Fe/Sport/XL, 2006-2020 Elantra, 2011-2016 Azera, 2015-2021 Tucson. Compatible with Kia 2011-2020 Sorento, 2017-2020 Sportage...
Sealant Protection: Our automotive brake fluid cap replacement features a premium rubber seal that tightly adheres to the reservoir port, effectively stopping fluid seepage or leakage caused by vehicle vibrations. This keeps your engine bay clean
Durable and Long-Lasting: The master cylinder cap is constructed from ABS plastic combined with an anti-aging rubber seal, capable of withstanding high temperatures and continuous vibration within the engine compartment. It remains resistant to...
Anti-slip Design: The brake reservoir cap features an innovative anti-slip textured cap top design that significantly enhances finger grip. This allows you to easily unscrew or tighten the reservoir cap by hand without any tools, greatly facilitating...
UNIVERSAL BRAKE BLEEDER ADAPTER FIT: This brake bleeder adapter is engineered as a universal master cylinder adapter, fitting most round brake fluid reservoir openings. It works with a wide range of vehicles including cars, trucks, and SUVs, making it...
DESIGNED FOR PRESSURE BRAKE BLEEDER KIT: Specifically designed to work with pressure brake bleeder kit systems, this adapter creates a secure connection to the master cylinder reservoir. It supports consistent pressure delivery during brake fluid...
ADJUSTABLE MASTER CYLINDER BLEEDER KIT DESIGN: Features an adjustable structure that allows fitting to different reservoir sizes. Works as part of a brake bleeder adapter kit or master cylinder bleeder kit, providing flexible compatibility without special...
LEAK RESISTANT BRAKE PRESSURE BLEEDER PERFORMANCE: Built with a sealing structure designed to help reduce leaks during use with a brake pressure bleeder system. When properly installed and evenly tightened, it helps maintain stable pressure and supports...
DURABLE BRAKE BLEEDER TOOL CONSTRUCTION: Made from high-strength, brake fluid–resistant materials for long-term use. Suitable for repeated applications in DIY garages and professional workshops, this brake bleeder adapter kit works with most brake...
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Brake Fluid Reservoirs
Ease of Installation
While many replacement reservoirs are designed for straightforward installation, some may require more mechanical expertise. Consider the complexity of removing the old unit and attaching the new one. Look for designs that include necessary mounting hardware or seals if they are not integrated. If you are not comfortable with DIY automotive repairs, factor in the potential cost of professional installation.
Frequently Asked Questions
How often should I check my brake fluid reservoir?
It's recommended to check your brake fluid level at least once a month as part of your regular vehicle maintenance. You should also inspect it before long road trips. Regular checks can help you identify potential leaks or issues early on.
What are the signs of a failing brake fluid reservoir?
Common signs include visible fluid leaks under the vehicle, a spongy or soft brake pedal, and a low brake fluid level warning light on your dashboard. The reservoir itself might also show signs of cracks or corrosion.
Can I use a universal brake fluid reservoir?
Universal reservoirs can be an option if a specific fitment is unavailable. However, you must ensure it has the correct port size and orientation for your brake lines. It's always best to find an OEM-equivalent or a vehicle-specific replacement for guaranteed compatibility and performance.
How do I know if my brake fluid reservoir needs replacing?
Inspect the reservoir for any cracks, leaks, or significant corrosion. If the fluid level consistently drops despite no apparent leaks elsewhere in the system, or if the reservoir is visibly damaged, it likely needs replacement.
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