Best Car Reservoirs of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 9, 2026

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Car reservoirs are an essential component of a vehicle's braking system. They store brake fluid that is responsible for transmitting force from the brake pedal to the brake calipers, which ultimately slows down or stops the car. These reservoirs are typically made of plastic or metal and come in various shapes and sizes to fit different vehicles. It is important to regularly check and maintain the brake fluid level in the reservoir to ensure optimal braking performance and safety on the road. Car reservoirs are widely available at auto parts stores and online retailers.

At a Glance: Our Top Picks

KEVWR Car Wiper Bottle Cover Replacement Cap Cover #TOP 1
KEVWR Car Wiper Bottle Cover Replacement Cap
ftb score rating icon 9.8
Gadgetime USA Windshield Washer Fluid Cap for Chevy, Cadillac, GMC 2010-2021 Cover #TOP 2
Gadgetime USA Windshield Washer Fluid Cap for Chevy, Cadillac, GMC 2010-2021
ftb score rating icon 9.7
Dorman Engine Coolant Reservoir for Buick / Chevrolet Cover #TOP 3
Dorman Engine Coolant Reservoir for Buick / Chevrolet
ftb score rating icon 9.5

Top 10 Car Reservoirs

#TOP 1

KEVWR Car Wiper Bottle Cover Replacement Cap

12767700
1 Pack
KEVWR Car Wiper Bottle Cover Replacement Cap Cover
Car Wiper Bottle Cover, Windshield Wiper Washer Fluid Reservoir Tank Bottle Cap, Car Wiper Bottle Cover Replacement Cap Compatible with GMC Chevrolet Buick Cadillac, OEM: 12767700, 13227300

The KEVWR Wiper Bottle Cap is a reliable replacement for your cracked or missing windshield washer fluid reservoir cap. It helps you easily locate the washer fluid reservoir thanks to clear markings, making maintenance simpler. Installing this cap is straightforward—just remove the old one and secure the new cap tightly to prevent leaks, ensuring your washer system works properly. Made from durable ABS plastic, this cap resists rust and is easy to clean, so it can last a long time and keep your vehicle in good shape. This small upgrade helps maintain your car’s safety and performance during every drive.

What We Like
Easy installation
Durable ABS material
Clear reservoir markings
Leak-proof seal
#TOP 2

Gadgetime USA Windshield Washer Fluid Cap for Chevy, Cadillac, GMC 2010-2021

GTUSAWFC
Black
Gadgetime USA Windshield Washer Fluid Cap for Chevy, Cadillac, GMC 2010-2021 Cover
Windshield Wiper Fluid Cap - OEM Replacement Washer Fluid Reservoir Cap for 12767700, 13227300, 19172571 - Easy Installation - Fits Chevrolet, Cadillac, GMC Models 2010-2021

The Gadgetime Washer Fluid Cap is designed to perfectly fit a wide range of Chevrolet, Cadillac, and GMC vehicles from 2010 to 2021. This means you get a replacement part that matches your car’s original specifications, ensuring reliable performance. Installation is simple and tool-free, so you can quickly replace the cap without hassle, saving you time and effort. The cap fits many popular models like Camaro, Malibu, and Escalade, making it a versatile choice if you own multiple vehicles or want a dependable spare. Built to last, it resists damage from weather and daily use, giving you a durable solution to keep your windshield washer fluid secure and leak-free.

What We Like
OEM fit compatibility
Easy, tool-free installation
Wide vehicle compatibility
Durable and weather-resistant
#TOP 3

Dorman Engine Coolant Reservoir for Buick / Chevrolet

603-383
Black
Dorman Engine Coolant Reservoir for Buick / Chevrolet Cover
Dorman 603-383 Pressurized Coolant Reservoir with Cap Compatible with Select Buick / Chevrolet Models

The Dorman 603-383 Engine Coolant Reservoir is an ideal solution for your vehicle's cooling system. It is a direct replacement, engineered for a seamless installation, and manufactured from quality materials to withstand underhood heat and vibration. With 100 years of automotive aftermarket experience, this reservoir is a trustworthy design. To ensure fit, input your vehicle's make, model, and trim level into the garage tool.

What We Like
Direct replacement for the original part
Durable construction withstands underhood heat and vibration
Backed by 100 years of automotive aftermarket experience
#TOP 4

Nudhfgauiyt Windshield Washer Fluid Reservoir Cap for Chevrolet, Buick, Cadillac, GMC

13227300
BLACK
1PCS
Nudhfgauiyt Windshield Washer Fluid Reservoir Cap for Chevrolet, Buick, Cadillac, GMC Cover
Windshield Wiper Washer Fluid Reservoir Tank Bottle Cap Cover For Chevrolet,For Buick, For Cadillac, For GMC,For Chevrolet part of the model

The Nudhfgauiyt Washer Reservoir Cap is a direct replacement part designed to fit a wide range of Chevrolet, Buick, Cadillac, and GMC vehicles. It replaces several original equipment part numbers, ensuring a perfect fit and reliable performance for your car. This cap is compatible with popular Cadillac models like the XTS, SRX, ATS, and Escalade, covering years from 2010 to 2021, so you can easily find one that suits your vehicle. It also fits multiple Chevrolet models such as the Camaro, Equinox, Malibu, and Silverado from 2010 to 2021. With this cap, you’ll maintain your windshield washer system’s efficiency and keep your car’s fluid reservoir sealed properly to prevent leaks and contamination.

What We Like
Direct OE replacement
Wide vehicle compatibility
Ensures proper sealing
Fits multiple model years
#TOP 5

OTUAYAUTO Windshield Wiper Washer Fluid Reservoir Tank Bottle Cap

QWT003
OTUAYAUTO Windshield Wiper Washer Fluid Reservoir Tank Bottle Cap Cover
OTUAYAUTO Windshield Wiper Washer Fluid Reservoir Tank Bottle Cap - for Chevrolet Buick GMC Cadillac - OEM#: 12767700,13227300 12788573, 19172571

Ensure your driving safety with the OTUAYAUTO Washer Fluid Cap. This replacement cap is designed to fit various Cadillac, Chevrolet, GMC, and Buick models. With easy installation, you can quickly replace your old washer reservoir cap and ensure a proper seal to prevent any leaks. The cap is made of premium plastic, ensuring durability and a longer service life. By regularly checking under your hood and replacing brittle caps, you can maintain the integrity of your windshield washer fluid. Don't compromise your safety on the road - choose the OTUAYAUTO Washer Fluid Cap.

What We Like
Easy installation
Premium plastic material
Ensure driving safety
#TOP 6

Biabari Windshield Washer Fluid Reservoir Cap 2PCS

13227300, 19172571, 12767700, 12788573
Black
Biabari Windshield Washer Fluid Reservoir Cap 2PCS Cover
2PCS Windshield Washer Fluid Reservoir Cap, Leak-Proof Windshield Wiper Fluid Cap, OE# 13227300 19172571 12767700 12788573, Fits GMC/Chevy Silverado/Cadillac ATS/Buick

The Biabari Washer Fluid Caps offer a reliable, leak-proof seal that keeps your engine area clean and ensures your windshield washer system works properly. Made from durable ABS plastic, these caps are designed to fit perfectly with many Chevrolet, Buick, GMC, and Cadillac models, so you can trust they match your vehicle’s original parts. The package includes two caps, giving you one to install right away and a spare for future use, which saves you from last-minute trips to the store. Installation is quick and simple—no tools or special skills needed—making it easy for anyone to replace a worn or missing cap in under a minute.

What We Like
Leak-proof seal
OEM exact fit
Two caps included
Easy tool-free installation
Durable ABS plastic
#TOP 7

Perfit Liner Windshield Washer Tank

GM1288121
Perfit Liner Windshield Washer Tank Cover
Perfit Liner Windshield Washer Reservoir Tank w/Cap and Pump Compatible with 1999-2006 Chevy Silverado GMC Sierra 1500 2500 HD 3500 2007 Classic Fits 12487670 GM1288121

The Perfit Liner Washer Tank is designed to fit a variety of Chevy and GMC models from 1999 to 2006, ensuring compatibility with your vehicle. It comes complete with a pump and cap, making installation straightforward and hassle-free. This product is manufactured to meet or exceed Original Equipment Manufacturer (OEM) standards, providing peace of mind regarding quality and durability. Additionally, Perfit Liner offers a one-year quality guarantee, ensuring you receive excellent customer service and support for any inquiries. This combination of features makes it a reliable choice for maintaining your vehicle's windshield washer system.

What We Like
Wide vehicle compatibility
Includes pump and cap
Meets OEM quality standards
One-year quality guarantee
#TOP 8

EVIL ENERGY 300ML Baffled Oil Catch Can Kit

EV01516BK-AMZ1
Black
3/8 Inch
EVIL ENERGY 300ML Baffled Oil Catch Can Kit Cover
EVIL ENERGY Oil Catch Can, 300ML Universal Baffled Catch Can Kit with 5FT 3/8 Inch Hose, Aluminum Air Oil Separator Upgraded Internal Filter

The EVIL ENERGY Oil Catch Can is designed to keep your engine running smoothly by trapping oil and moisture before they cause buildup. With its removable baffle and fine bronze filter, it prevents carbon deposits that can lead to misfires, helping you avoid power loss and extend your engine's lifespan. This catch can fits most cars with its 300ml tank capacity, fitting easily in your engine bay. It connects to the front of your PCV system, making installation straightforward. Plus, the included durable 5-foot NBR hose resists heat and wear, ensuring long-lasting performance and reliability for your vehicle.

What We Like
Effective oil and moisture trapping
Universal 300ml tank size
Durable heat-resistant hose
Easy installation on PCV system
#TOP 9

Click&Fit Windshield Washer Fluid Reservoir Cap for GM Vehicles

CNF034
Black
Neck 1.77in (45mm)
Click&Fit Windshield Washer Fluid Reservoir Cap for GM Vehicles Cover
Click&Fit Windshield Washer Fluid Reservoir Cap Tank Bottle compatible with Cadillac ATS SRX Escalade Chevrolet Silverado Impala Malibu GMC Sierra 1500 Acadia Buick Enclave Encore Regal, 13227300

The Click&Fit Washer Cap is designed to fit a wide range of Chevrolet, Buick, GMC, and Cadillac models from recent years. This compatibility means you can easily find a perfect match for your vehicle, ensuring reliable performance. The cap replaces several common part numbers, making it a versatile aftermarket option if you need a replacement without buying a genuine part. Installation is simple and tool-free, so you can quickly attach the cap by hand without any hassle. This product helps maintain your windshield washer system efficiently, giving you peace of mind while driving in various weather conditions.

What We Like
Wide vehicle compatibility
Replaces multiple part numbers
Easy, tool-free installation
Aftermarket affordability
#TOP 10

DWARFOO Windshield Washer Reservoir Cap for Chevy, Buick, Cadillac

qp5101
Black
DWARFOO Windshield Washer Reservoir Cap for Chevy, Buick, Cadillac Cover
2 PCS Windshield Washer Reservoir Cap, Windshield Wiper Washer Fluid Reservoir Tank Bottle Cap Fit for Chevy Buick Cadillac, Replaces OEM #: 13227300, 12767700, 12788573

The DWARFOO Washer Reservoir Cap is designed to replace worn or damaged caps on your windshield washer fluid tank, ensuring your vehicle stays in top condition. It fits various Chevy, Buick, and Cadillac models, helping you easily find the right match by checking the OEM part number. This cap is built to withstand heat and wear, preventing cracks and leaks that can occur over time. Installation is simple and tool-free, letting you quickly swap out the old cap and secure the new one for a tight seal. With this cap, you can keep your windshield washer system functioning properly and avoid fluid leaks.

What We Like
OEM part replacement
Wide vehicle compatibility
Heat and wear resistant
Easy tool-free installation
Buying Guide Image

Finding the Best Car Reservoirs to Meet Your Car's Needs

Introduction

Car reservoirs are essential components of any vehicle, as they hold the fluids that keep the car running smoothly. Choosing the right car reservoirs for your vehicle is crucial, as the wrong ones can cause damage or even leave you stranded on the side of the road. In this article, we'll discuss the factors to consider when selecting car reservoirs and provide some tips for making the best choice.

Types of Car Reservoirs

One of the first things to consider when choosing car reservoirs is the type of reservoir that your vehicle requires. There are two main types of car reservoirs: sealed and vented.

Sealed car reservoirs are typically used for holding liquids that are under pressure, such as brake fluid or power steering fluid. These reservoirs are designed to prevent the liquid from escaping, even if the car is turned upside down or shaken.

Vented car reservoirs, on the other hand, are used for holding liquids that are not under pressure, such as coolant or windshield wiper fluid. These reservoirs are designed with a vent or opening to allow air to enter and exit the reservoir as the liquid level changes.

Size and Capacity

Another important factor to consider when choosing car reservoirs is the size and capacity of the reservoir. In general, it's important to choose a reservoir that is the correct size for your vehicle, as a reservoir that is too small may not hold enough fluid, while a reservoir that is too large may take up unnecessary space.

When it comes to capacity, it's important to choose a reservoir that is capable of holding the correct amount of fluid for your vehicle. As a general rule, it's best to choose a reservoir that is slightly larger than the recommended capacity, as this will provide some extra space for fluid expansion.

Material and Durability

The material and durability of the car reservoir are also important factors to consider. In general, it's best to choose a reservoir that is made from high-quality materials, such as polyethylene or polypropylene, as these materials are resistant to cracking and warping.

Additionally, it's important to choose a car reservoir that is durable and able to withstand the rigors of daily use. This will help to ensure that the reservoir lasts for as long as possible, and won't need to be replaced frequently.

Brand and Price

When it comes to choosing car reservoirs, brand and price are also important factors to consider. In general, it's best to choose a reputable brand that has a proven track record of producing high-quality car reservoirs.

When it comes to price, it's important to strike a balance between quality and cost. While it's tempting to choose the cheapest option, it's important to remember that car reservoirs are an essential component of your vehicle, and choosing a low-quality or poorly-made reservoir could result in costly repairs or even danger to you and your passengers.

Conclusion

In conclusion, choosing the right car reservoirs for your vehicle is crucial, as the wrong ones can cause damage or leave you stranded. When choosing car reservoirs, consider the type, size and capacity, material and durability, brand, and price. By taking the time to carefully select the right car reservoirs for your vehicle, you can ensure that your car runs smoothly and reliably for years to come.

Frequently Asked Questions (FAQs)

1. Do cars have water reservoirs?

Yes, cars have coolant reservoirs. These reservoirs serve as a regulating component for excess coolant produced from engine heat. As the engine warms up, coolant expands and overflows into the reservoir. When the car cools down after shut-off, the coolant is then drawn back into the radiator.

2. What are the signs of a bad reservoir?

Signs of a bad reservoir include cracks or breaks, which can cause leaks. Small leaks may result in steam and drips, while larger leaks can lead to streams and puddles. Additionally, an obvious coolant odor may be present.

3. Can you drive with low coolant reservoir?

It is not recommended to drive with a low level of engine coolant. Coolant is crucial for preventing engine overheating in hot weather and freezing in sub-zero temperatures. Sufficient coolant is necessary to protect components and maintain optimal engine performance.

4. What happens when coolant reservoir is bad?

When the coolant reservoir is bad, it may fail to store excess coolant or handle increased pressure, resulting in engine overheating. Symptoms of a faulty reservoir tank include a flickering temperature gauge on the dashboard and an overflowing coolant tank.

5. Can I run water in my car?

In emergency situations, you can add water to the radiator if it is low or empty. However, it is ideal to use a 50/50 mix of coolant and water or pre-mixed coolant for optimal performance. Water should only be used temporarily to get you to your destination.

6. Do cars use water or coolant?

Cars use coolant instead of water for several reasons. Impurities in tap water can settle and cause clogs in the engine. Water is also corrosive and can rust or corrode internal metal engine parts. Coolant fluids are specifically designed to prevent these issues and provide better protection for the engine.

7. Can I drive with a broken coolant reservoir?

Yes, you can still drive with a broken coolant reservoir. However, it is important to address the issue as soon as possible to prevent further damage to the cooling system.

Editor's Notes

During our car reservoir research, we found 24 car reservoir products and shortlisted 10 quality products. We collected and analyzed 25,530 customer reviews through our big data system to write the car reservoirs list. We found that most customers choose car reservoirs with an average price of $5.16.

The car reservoirs are available for purchase. We have researched hundreds of brands and picked the top brands of car reservoirs, including KEVWR, Gadgetime USA, Dorman, Nudhfgauiyt, OTUAYAUTO. The seller of top 1 product has received honest feedback from 586 consumers with an average rating of 4.9.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.