Best Emission Air Check Valves of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 10, 2026

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Emission air check valves are crucial components of a vehicle's emission control system. These valves are designed to allow the flow of air into the system while preventing the escape of harmful gases. They help to ensure that the engine is running efficiently and that emissions are kept at a minimum. Emission air check valves come in various shapes and sizes, and they are designed to fit different types of vehicles. They are durable and long-lasting, and they are an essential part of any vehicle's emission control system. Without these valves, a vehicle's emissions could be significantly higher, causing harm to the environment and potentially leading to fines for the vehicle owner.

At a Glance: Our Top Picks

RANSOTO Air Suspension Valve Block for Mercedes Benz Cover #TOP 1
RANSOTO Air Suspension Valve Block for Mercedes Benz
ftb score rating icon 9.9
VIAIR 1/4" Nickel Check Valve Cover #TOP 2
VIAIR 1/4" Nickel Check Valve
ftb score rating icon 9.8
NewYall 4.2L Secondary Air Valve Cover #TOP 3
NewYall 4.2L Secondary Air Valve
ftb score rating icon 9.6

Top 10 Emission Air Check Valves

#TOP 1

RANSOTO Air Suspension Valve Block for Mercedes Benz

LW090
RANSOTO Air Suspension Valve Block for Mercedes Benz Cover
RANSOTO Air Suspension Valve Block Air Supply Distribution Replace 2123200358 Compatible with Mercedes Benz GL350 GL450 GLE350 GLE400 S350 S400 S550 S63 S65 AMG ML320 ML350 CL550 CL600

The RANSOTO Valve Block is a reliable replacement part designed for various Mercedes Benz models from 2007 to 2018. It fits key models like the GL350, GL450, GLE350, and S350, ensuring compatibility with your vehicle’s air suspension system. This valve block helps distribute air supply efficiently, which is essential for maintaining a smooth and comfortable ride. By using this part, you can keep your suspension system functioning properly, preventing costly repairs and improving your driving experience. The RANSOTO Valve Block is an easy-to-install solution that keeps your Mercedes Benz performing at its best.

What We Like
Wide model compatibility
Efficient air supply distribution
Reliable replacement part
Supports smooth suspension
#TOP 2

VIAIR 1/4" Nickel Check Valve

92822
0.25 Inch
VIAIR 1/4" Nickel Check Valve Cover
Viair 1/4" (F) TO 1/4" (M) Black Nickel Plated Check Valve

The VIAIR Nickel Check Valve is designed with a 1/4 inch female to 1/4 inch male connection, making it easy to fit into your existing air systems without hassle. Its black nickel plating offers strong resistance to corrosion, so you can trust it to last longer even in tough environments. The valve also comes pre-treated with thread sealant, which helps prevent leaks and ensures a secure, airtight fit when you install it. This makes the VIAIR Nickel Check Valve a convenient and reliable choice for maintaining proper airflow and protecting your equipment.

What We Like
1/4" female to male connection
Corrosion-resistant black nickel plating
Pre-applied thread sealant
#TOP 3

NewYall 4.2L Secondary Air Valve

12619ll0
other
1/2 inch NPT
NewYall 4.2L Secondary Air Valve Cover
NewYall 4.2L Secondary Air Injection Check Valve for Buick Rainier 2006-2007, Chevrolet Trailblazer 2006-2009, Trailblazer EXT 2006, GMC Envoy 2006-2009, Envoy XL 2006, Saab 9-7x 2006-2009

The NewYall Air Check Valve is designed specifically for several vehicle models, including the Buick Rainier, Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x, all equipped with a 4.2L petrol engine. This valve is crucial for maintaining proper emissions control, ensuring your vehicle runs efficiently while reducing harmful emissions. By replacing your old or malfunctioning valve, you can improve your vehicle's performance and fuel efficiency. Additionally, this product is compatible with various models from 2006 to 2009, making it a versatile choice for many drivers seeking reliable emissions solutions.

What We Like
Improves vehicle emissions control
Enhances fuel efficiency
Compatible with multiple models
Designed for 4.2L petrol engines
#TOP 4

Kohler Genuine Part GP1152349 15MM Valve (Hot)

GP1152349
Unfinished
15mm
Kohler Genuine Part GP1152349 15MM Valve (Hot) Cover
Kohler Genuine Part GP1152349 15MM Valve (Hot)

The Kohler Genuine Part GP1152349 15MM Valve (Hot) is a ceramic cartridge designed to replace the hot side valve in various Kohler centerset and widespread faucets. It is engineered to promote longevity and made with premium materials for enhanced durability.

What We Like
Long-lasting performance
Premium materials used for durability
Compatible with various Kohler centerset and widespread faucets
#TOP 5

Dasbecan Secondary Air Injection Check Valve for 4.6L Toyota/Lexus

25702-38050
Dasbecan Secondary Air Injection Check Valve for 4.6L Toyota/Lexus Cover
Dasbecan Secondary Air Injection Check Valve Left Driver Side Compatible with 4.6L Toyota Tundra Lexus GX460 2010-2014 Toyota Sequoia 2010-2012 Replace 25702-38050

The Dasbecan Air Injection Valve is designed to fit 4.6L engines in Toyota Tundra (2010-2014), Lexus GX460 (2010-2014), and Toyota Sequoia (2010-2012). It replaces the original part number 25702-38050, ensuring compatibility with your vehicle. This valve helps prevent air from flowing backward, which keeps your secondary air injection system running smoothly and supports better engine emissions control. Made from high-quality aluminum, it resists corrosion and offers long-lasting durability. Plus, its precise connector design makes installation straightforward, so you can enjoy a hassle-free replacement experience.

What We Like
Precise OEM fit
Prevents air backflow
Improves emission efficiency
Durable aluminum build
Easy installation
#TOP 6

Flynsu Check Valve for Toyota

Flynsu 2571050041 2571050042
1/2 inch
Flynsu Check Valve for Toyota Cover
911-622 Secondary Air Inject Check Valve Replacement for 2007-2009 Toyota Sequoia Tundra 4.7L V8 2571050031 2571050042 Flynsu

The Flynsu Toyota Check Valve is designed specifically for the 2007-2009 Sequoia and Tundra models with a 4.7L V8 engine. This high-quality replacement part ensures optimal performance by effectively managing emissions. Its easy installation means you won’t need to make any modifications to your vehicle. Furthermore, it is built to last, providing durability that you can rely on. With a 24-month warranty, you can have peace of mind knowing that you are covered in case of any issues.

What We Like
Easy installation
Durable materials
Long warranty period
Compatible with specific models
#TOP 7

Ytrica Secondary Air Injection Check Valve for Toyota Tacoma 4.0L V6

25710-31022
Ytrica Secondary Air Injection Check Valve for Toyota Tacoma 4.0L V6 Cover
Ytrica 25710-31022 Secondary Air Injection Check Valve, Fit for Toyota Tacoma | 4.0L V6 1GR-FE 2012 2013 2014 2015 - Replace 2571031021 17613-0P010 2571031020

The Ytrica Air Injection Valve is designed specifically for 2012-2015 Toyota Tacoma models with the 4.0L V6 engine. This valve helps keep your vehicle’s secondary air injection system working properly, which can fix common error codes like P2440 and P2442. By ensuring the emission system functions correctly, it helps reduce harmful exhaust gases, making your engine more efficient and environmentally friendly. The valve fits perfectly with Toyota’s original equipment specifications, meaning it integrates smoothly with your existing setup for long-lasting performance.

What We Like
OEM compatibility
Fixes emission error codes
Improves engine efficiency
Durable and reliable
#TOP 8

Camotokiit Roll Over Check Valve for Jeep CJ Series and Wagoneer

5360058 53004047
Black
1/8 Inch
Camotokiit Roll Over Check Valve for Jeep CJ Series and Wagoneer Cover
Roll Over Check Valve Assembly Compatible with Jeep CJ5 CJ6 And CJ7 CJ8 1972-1986 Metal Fuel Tank Fits Jeep Wagoneer 1974-1979, Compatible with Jeep Commando 1972-1973,Cherokee, J-Series Truck

The Camotokiit Jeep Check Valve is designed to fit various Jeep models, including the CJ5, CJ6, CJ7, CJ8, Wagoneer, Commando, Cherokee, and J-Series trucks from the 1970s to the mid-1980s. This valve plays a crucial role in managing emissions by controlling airflow, helping your vehicle run cleaner and more efficiently. Made from a combination of rubber, metal, and plastic, it offers durability and reliability for long-term use. Its rear placement on the vehicle ensures proper installation and optimal performance. With this check valve, you can maintain your Jeep's emission system effectively and keep your engine running smoothly.

What We Like
Durable mixed materials
Fits multiple Jeep models
Controls vehicle emissions
Easy rear installation
#TOP 9

USTAR Secondary Air Injection Check Valve for Lexus and Toyota V8 5.7L

25701-38064
sliver
12 inches
USTAR Secondary Air Injection Check Valve for Lexus and Toyota V8 5.7L Cover
USTAR Secondary Air Injection Check Valve Compatible with Lexus LX570 Toyota Land Cruiser Sequoia Tundra V8 5.7L Replaces 25701-38064 25701-38060 911-643 119137

The USTAR Air Injection Valve is designed to perfectly fit Lexus LX570 and various Toyota V8 5.7L models, including the Land Cruiser, Sequoia, and Tundra. This ensures you get a part tailored to your vehicle’s needs, making installation straightforward. It serves as a direct replacement for several original valve models, so you can easily swap out your old or faulty valve without hassle. With this valve, you restore your vehicle’s secondary air injection system, which helps reduce emissions and keeps your engine running smoothly. Made from high-quality materials, it offers durability and long-lasting performance, giving you peace of mind on the road.

What We Like
Wide vehicle compatibility
Direct replacement fit
Restores system function
Durable material construction
#TOP 10

HUFEWU 7L1Z-9H465-B Vacuum Line Check Valve Kit for Ford F150 Lincoln Mark LT 2011-2014

BL34-7A788-AA 7L1Z-9H465-B
1 Set
HUFEWU 7L1Z-9H465-B Vacuum Line Check Valve Kit for Ford F150 Lincoln Mark LT 2011-2014 Cover
7L1Z-9H465-B Lock Vacuum Line Tube Check Valve Kit Fit for Ford F150 Lincoln Mark LT 2011-2014, 4WD Vacuum Solenoid Purge Valve Replace BL34-7A788-AA

The HUFEWU 4WD Vacuum Valve is built with durable plastic, rubber, and metal, offering strong resistance to heat and wear, so you can count on it to last. It helps keep the four-wheel drive system’s vacuum pressure steady, ensuring smooth power to your front wheels and reliable locking of the front differential and wheel hub. If you’ve noticed issues like inconsistent 4WD engagement or warning lights on your dashboard, this valve kit is designed to fix those problems by preventing vacuum leaks and system faults. Plus, it fits perfectly on Ford F150 and Lincoln Mark LT models from 2011 to 2014, making maintenance easier for you.

What We Like
Durable materials
Maintains 4WD vacuum pressure
Fixes 4WD engagement issues
Compatible with Ford and Lincoln
Easy plug-and-play installation
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the symptoms of a bad air injection check valve?

Symptoms of a bad air injection check valve include an illuminated Check Engine Light, increased tailpipe emissions, and potential damage to other parts of the AIR system. If you notice these signs, it's important to have the check valve inspected and replaced if necessary to ensure proper functioning of the vehicle's emission control system.

2. Where should a CO2 check valve be placed?

A CO2 check valve should be placed right under the bubble counter or inline diffuser, as these devices have water present directly. If a bubble counter is not used, the check valve should be installed between the regulator and the diffuser to provide solenoid protection.

3. Do I need a check valve on my aquarium air pump?

While an air pump can function without a check valve, it is recommended to have one as a failsafe measure. The check valve acts as a safeguard in case of any issues. It helps prevent backflow and keeps the air pump working effectively, ensuring proper aeration in the aquarium.

4. How much does it cost to replace an air injection valve?

The cost of replacing an air injection valve can vary depending on the car model but is typically between $517 and $563. It's best to consult with a professional mechanic for an accurate estimate based on your specific vehicle.

5. What can a bad check valve cause?

A bad check valve can cause various issues in a fluid or gas system. It can lead to leakage, loss of pressure, contamination, overflow, and in severe cases, complete system failure. It is important to maintain and replace check valves as needed to prevent these problems and ensure the proper functioning of the system.

6. Should there be a check valve between pump and pressure tank?

Yes, it is recommended to have a check valve between the pump and pressure tank in a water system. The check valve helps maintain pressure when the pump shuts off and prevents backspin, upthrust, and water hammer. It is a crucial component in submersible well pump installations to ensure the system operates efficiently.

7. How often should a check valve be replaced?

Check valves typically have a lifespan of five to seven years and may need to be replaced frequently. The metal disc design, which is commonly used, is relatively simple but may require replacement due to wear and tear over time. Regular inspection and maintenance can help determine when a check valve needs to be replaced.

Editor's Notes

During our emission air check valve research, we found 24 emission air check valve products and shortlisted 10 quality products. We collected and analyzed 2,796 customer reviews through our big data system to write the emission air check valves list. We found that most customers choose emission air check valves with an average price of $74.82.

The emission air check valves are available for purchase. We have researched hundreds of brands and picked the top brands of emission air check valves, including RANSOTO, VIAIR, NewYall, Kohler, Dasbecan. The seller of top 1 product has received honest feedback from 927 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.