Men's Clothing

The Best Automotive Replacement Emission Air Bypass Valves

1 min read WeKompare Editorial Team Products verified: September 1, 2026 10 products compared

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Ensuring your vehicle's emissions system functions correctly is vital for environmental compliance and optimal engine performance. A faulty air bypass valve can lead to rough idling, poor fuel economy, and failed emissions tests. Selecting the right replacement valve is crucial for restoring your car's efficiency and adhering to regulations.

No. 1
Dorman 02253 Vacuum Bypass Cap Assortment, 8 Piece Universal Fit
Dorman 02253 Vacuum Bypass Cap Assortment, 8 Piece Universal Fit
  • Engineered from durable, heat- resistant vinyl
  • Provides a tight fit to prevent vacuum leaks
  • Excellent for capping lines and hoses while testing carburetors, emission control systems, vacuum lines, and more
  • Conveniently packaged in a variety of sizes, assortments, and quantities
  • Support available - every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
$11.49 Amazon Prime
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No. 2
AITKEN Turbo Bypass Solenoid Charge Air Bypass Valve for Cruze Encore
AITKEN Turbo Bypass Solenoid Charge Air Bypass Valve for Cruze Encore
  • Charge Air Bypass Solenoid (aka Bypass Valve Solenoid/Intake Bypass Control Solenoid) – Core Intake Pressure Regulator: As a key turbocharged intake system component, it controls bypass valve actuation to stabilize manifold air pressure. This...
  • According to the known information, the fault manifestations of this Charge Air Bypass Solenoid mainly include：loss of power, smoke from the tail pipe, acceleration hesitation, stalling, a burning oil odor (potentially stemming from an oil leak), and an...
  • High-Efficiency Intake Bypass Control Solenoid (Bypass Solenoid for Short): It balances turbocharged intake pressure to ensure smooth engine power output (its key function). Replacing a faulty unit eliminates recurring flow restrictions, wipes out burning...
  • Reference Number: 55559239, 55574902, 70115800, 70347300, 70383301.
  • Vehicle Fitment: This Turbocharger Boost Solenoid is compatible with Buick Encore 2013-2020, Chevy Cruze 2011-2015, Chevy Cruze Limited 2016, Chevy Sonic 2012-2020, Chevy Trax 2013-2020. 1.4L (RPO LUV) engine.
$14.99
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No. 3
GM Genuine Parts 55574902 Turbocharger Intercooler Bypass Valve
GM Genuine Parts 55574902 Turbocharger Intercooler Bypass Valve
  • Made in Germany
  • Package Dimensions: 9.906 L x 7.111 H x 9.398 W (centimeters)
  • Manufactured to GM OE specification for fit, form, and function
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Whether you need exact original equipment specification parts or high-quality replacement parts, you can rely on ACDelco Emission components, Fuel Injection and Control Modules to deliver. With our OE Service and Professional lines, we can keep your GM...
  • When you are looking for a match to original equipment specifications in a replacement part for your GM vehicle, trust ACDelco to get the job done! Our lineup of OE Service Fuel Injectors, Control Modules, Mass Air Flow Sensors, Oxygen Sensors, Exhaust...
$57.99 Amazon Prime
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No. 4
GM Genuine Parts 12633355 Charge Air Bypass Valve Solenoid
GM Genuine Parts 12633355 Charge Air Bypass Valve Solenoid
  • Helps regulate air pressure entering your vehicleÆs engine
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
$47.95 Amazon Prime
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No. 5
2019-2023 Silverado/Sierra 1500 w/ 6L80 or 8L90 Transmission and 1/2' Line - Transmission Fluid Thermal Bypass...
2019-2023 Silverado/Sierra 1500 w/ 6L80 or 8L90 Transmission and 1/2" Line - Transmission Fluid Thermal Bypass...
  • 125070000 Transmission Fluid Thermal Bypass Valve - 8L90, 2019+
$84.20
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No. 6
Pifipour 8975158401 Air By-Pass Control Valve for Isuzu DMAX Mazda 70556807
Pifipour 8975158401 Air By-Pass Control Valve for Isuzu DMAX Mazda 70556807
  • 【Amazon Fulfillment】: All our Product use amazon fulfillmen which is fast and reliable, please feel free to contact us if you have any questions.
  • 【Check OE Number on Vehicle Manual】: Please check your vehicle OE number year/make/model before purchasing. Or you could contact us about the product details.
  • 【Compatible with OE Fit】:8975158401; 70556807; 7.05568.07;
  • 【Compatible with Vehicles Fit】:Isuzu DMAX | Mazda
  • 【About Quality】: Manufactured with quality standards, stable performance and high reliability. Pifipour Auto provides One-year warranty.
$67.50
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No. 7
AEM 20-401S 2.5' Air Bypass Valve
AEM 20-401S 2.5" Air Bypass Valve
  • Virtually eliminates chance of intake system ingesting water if filter becomes submerged
  • Installs along upper portion of AEM intake systems with minor modifications
  • Patent #6,394,128
  • Complete hardware and installation instructions included
  • For a cross reference chart to see which Bypass Valve fits your Cold Air Intake System please visit aempower website.
$63.99
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No. 8
A-Premium Fuel Injection Idle Air Control Valve With 2-Pin Plug
A-Premium Fuel Injection Idle Air Control Valve With 2-Pin Plug
  • [Vehicle Fitment]: Compatible with Ford Focus 2005-2007 L4 2.0L, Focus 2003 L4 2.3L, Focus 2005-2007 L4 2.3L; Fit for Mazda B2300 2003-2008 L4 2.3L, B2300 2010 L4 2.3L---Auxiliary Air Valve; Compatible with Ford Focus 2004 L4 2.3L, Ranger 2001-2011 L...
  • [Reference Number]: AC504, 4J1066, CX1773, 2152099, 1F2020660, 1S7Z9F715AA
  • [Specifications]: ①Port Quantity: 1; ②; ③Terminal Gender: 2; ④Gaskets Included: Yes; ⑤Packaging Type: Box; ⑥Fitment: Direct Replacement
  • [Advantages]: Regulates engine idle speed by controlling the amount of air that bypasses the throttle plate when the throttle is closed. It smooths the idle speed, reduces fuel consumption and gives your car a higher performance.
  • [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted idle air control valve. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.
$42.99
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No. 9
Air Bypass Blow Off Valve
Air Bypass Blow Off Valve
  • Compatible model: WRX STI 2013-2021, Impreza 2004-2014, Forester 2006-2008
  • Replacement part number: 14471AA143 Please confirm if it is the model you need before purchasing.
  • Product features: Made from high-quality raw materials, it is heat-resistant, corrosion-resistant, sturdy and durable, with a long service life.
  • Easy installation: The product is easy to install and can be replaced directly, saving you time and effort
  • Package includes: 1*Air Bypass Blow Off Valve
$109.99
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No. 10
Autotecnica L3K920250A Bypass Valve
Autotecnica L3K920250A Bypass Valve
  • Guaranteed fitment
  • Replaces failing OE turbocharger bypass valves that can leak boost pressure and degrade engine performance
  • Manufactured to original valve specifications for easy installation and reliable performance
  • Durable high-quality materials withstand high temperatures and rapid boost fluctuations
  • 24 Month Unlimited Mileage Warranty
$177.48
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Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Automotive Replacement Emission Air Bypass Valves

Understanding Air Bypass Valves

An air bypass valve, also known as an idle air control (IAC) valve, regulates the amount of air that bypasses the throttle plate to control engine idle speed. When this valve malfunctions, it can cause a range of issues from stalling to inconsistent RPMs. Replacing it with a quality part is essential for a smooth-running engine.

Key Features to Consider

  • Material Quality: Look for valves constructed from durable materials like high-grade plastic or metal to ensure longevity and resistance to heat and contaminants.
  • Vehicle Compatibility: Always verify that the valve is designed for your specific year, make, and model of vehicle. Using an incompatible part can lead to performance problems or damage.
  • Brand Reputation: Opt for reputable brands known for producing reliable automotive parts. Reviews and customer feedback can offer insights into a product's performance and durability.
  • Ease of Installation: While many valves are designed for direct fitment, some may require minor modifications. Check product descriptions for installation details.

Signs of a Failing Valve

Several symptoms can indicate that your air bypass valve needs replacement:

  • Rough or unstable idle
  • Stalling when coming to a stop
  • Difficulty starting the engine
  • Check Engine light illuminated (often with specific codes related to idle control)
  • Inconsistent engine RPMs

Maintenance and Replacement Tips

Regular maintenance isn't typically required for these valves, as they are generally replaced when they fail. When purchasing a replacement, ensure it comes with any necessary gaskets or seals. If you are not comfortable with automotive repair, it is advisable to have a professional mechanic perform the installation.