Subaru WRX STI Fuel and Emissions Systems

Essential Subaru WRX STI Fuel and Emissions Systems

Carquest Premium – EGR Valve (Part No.EGC1654)

EGR Valve

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$154.99
Carquest Premium exhaust gas recirculation (EGR) valves are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Our Carquest Premium EGR valves are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Carquest Premium EGR valves undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium EGR valves are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • Precision engineering and robust design to withstand harsh under hood environment
  • Gaskets or seals are included if required for installation
  • Extensive design validation testing and 100% end-of-line tested
  • Where applicable stainless-steel sleeves used over cold rolled sleeves providing smooth EGR pintle operation under all operating conditions.
  • Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413
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Delphi – Fuel Tank Cleaning Kit (Part No.FC01)

Fuel Tank Cleaning Kit

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$12.49
When replacing a fuel pump or module, it’s extremely important to clean the tank. Existing dirt, debris, and contamination stuck in the fuel tank can clog the brand-new strainer. Delphi’s Fuel Tank Cleaning Kit (FC01) and Tool (FC02) can help clean your fuel tank in less than five minutes. The FC01 includes a low-suds solution, cloth, and gloves that works together with the FC02 to help clean those hard to reach places without having to remove the fuel tank. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.

Product Features:
  • Helps avoid premature fuel pump failure
  • Lint free towel included
  • Low suds formulation
  • Removes harmful contaminants from the fuel tank
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Carquest Premium – Manifold Absolute Pressure Sensor (MAP) (Part No.ECA1502)

Manifold Absolute Pressure Sensor (MAP)

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$272.99
CARQUEST MAP sensors are manufactured with critical OEM components to ensure that your engine runs efficiently to reach the best gas mileage on your vehicle.

Product Features:
  • CARQUEST MAP sensors connectors are exact OE fit to ensure the proper vacuum is maintained to prevent power loss and to minimize internal contamination.
  • CARQUEST MAP sensors utilize high temperature resistant seals. Damaged seals can directly impact the vehicles fuel-to-air ratio, making it less fuel efficient.
  • CARQUEST MAP sensors are 100% individually tested for all product functionalities including proper vacuum seal and electrical output.
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Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.61359)

Fuel Injection Throttle Body Mounting Gasket

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$7.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Validated for fit, form, and function
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Carquest Premium – Fuel Injector Seal Kit (Part No.AS024A)

Fuel Injector Seal Kit

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$7.99
CARQUEST fuel injector seal kits include the necessary O-rings and seals to properly reseal the injector, which is a recommended practice any time the injector is removed. Each kit services one injector and includes hard to find or previously dealer-only components.

Product Features:
  • Premium OE quality materials
  • Services one injector
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Carquest Premium – Locking Fuel Tank Cap (Part No.10591)

Locking Fuel Tank Cap

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$23.99
Product Features:
  • Protects your fuel from theft and vandalism
  • Protects your fuel from theft and vandalism
  • Passes all state and federal emissions tests
  • Manufactured from durable, long-life materials
  • Reduces air pollution with proper sealing and venting
  • Independently tested for emission control
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Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17591)

Keyed Alike Locking Fuel Cap

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$11.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year.

Product Features:
  • Passes all state and federal emissions tests
  • Independently tested for emission control
  • Independently tested for emission control
  • Protects your fuel from theft and vandalism
  • Reduces air pollution with proper sealing and venting
  • Manufactured from durable, long-life materials
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Felpro – Fuel Injector O-Ring Kit (Part No.ES 73204)

Fuel Injector O-Ring Kit

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$13.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered for the sealing repair environment
  • Unsurpassed quality you can trust
  • Validated for fit, form, and function
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Felpro – Fuel Injector O-Ring Kit (Part No.ES 73202)

Fuel Injector O-Ring Kit

from

$7.49
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered for the sealing repair environment
  • Unsurpassed quality you can trust
  • Validated for fit, form, and function
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Carquest Premium – Reman Multi Port Fuel Injector (Part No.A212-3414)

Reman Multi Port Fuel Injector

from

$79.99
CARQUEST’S line of remanufactured OEM fuel injectors are remanufactured using a proven 15 step process at a state-of-the-art remanufacturing facility in the U.S.A. Each injector is 100% tested under multiple operating conditions to ensure each injector meets or exceeds OE specifications for flow rate, spray pattern, coil resistance, form, fit and function. Each injector includes new external seals and O-rings.

Product Features:
  • Each unit is 100% tested to OE specifications
  • Includes new O-rings and seals made of premium OE quality materials
  • Includes application specific technical bulletin, where applicable
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Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA1299)

Ambient Air Temperature Sensor

from

$74.99
The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
  • Application matched components ensures system operation in like new condition.
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DENSO – Mass Air Flow Sensor (Part No.197-6130)

Mass Air Flow Sensor

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$177.99
DENSO’s innovated designs reduces the size and weight which allows for easy installation. Glass film coated sensing elements reduces contamination exposure and improves reliability.

Product Features:
  • OE technology adapted for the aftermarket
  • Reduces emissions, increased performance
  • Delivers the highest reliability and detection accuracy
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Delphi – Mass Air Flow Sensor (Part No.AF10345)

Mass Air Flow Sensor

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$191.99
Every single Delphi mass air flow (MAF) sensor that we manufacture – whether with or without the housing – is built with calibrated all-new components and is never remanufactured. Our mass air flow sensors are designed and tested to meet or exceed OE requirements, and engineered for a perfect fit in more than 180 million vehicles on the road today in North America – including makes from Ford, Toyota, Nissan, Volkswagen, Hyundai, BMW, Honda, GM, Mazda, Subaru, Acura and more.

Product Features:
  • Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
  • Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
  • Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
  • All parts are calibrated and tested to match the OE part
  • Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube.
  • Delphi OE technology validated to match the vehicle applications
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Carquest Premium – Vapor Canister Purge Solenoid: Includes Mounting Hardware (Part No.CPC1423)

Vapor Canister Purge Solenoid: Includes Mounting Hardware

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$88.99
Maximize your vehicle’s efficiency and emissions control with Carquest Vapor Canister Purge Solenoids. Engineered for precision, these solenoids seamlessly regulate the flow of fuel vapors from the Vapor Canister to the engine for cleaner combustion, reducing harmful emissions. Built to meet and/or exceed OEM standards, Carquest Purge Solenoids offer reliable functionality, long-lasting durability, and easy installation.

Product Features:
  • Enhances overall engine performance by providing proper vapor flow to maintain correct air-fuel mixture.
  • Helps reduce harmful emissions and ensures compliance with environmental regulations by controlling the release of fuel vapors into the engine
  • Ensures precise operation with electromagnetic principles to control the flow of fuel vapors from the carbon canister to the engine
  • Manufactured from high quality engineered materials, resistant to fuel vapors and extreme temperatures, ensuring long lasting performance
  • Meets or exceeds all OEM specifications
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Carquest Premium – Vapor Canister Purge Solenoid: Includes Mounting Hardware (Part No.CPA2501)

Vapor Canister Purge Solenoid: Includes Mounting Hardware

from

$48.49
Maximize your vehicle’s efficiency and emissions control with Carquest Vapor Canister Purge Solenoids. Engineered for precision, these solenoids seamlessly regulate the flow of fuel vapors from the Vapor Canister to the engine for cleaner combustion, reducing harmful emissions. Built to meet and/or exceed OEM standards, Carquest Purge Solenoids offer reliable functionality, long-lasting durability, and easy installation.

Product Features:
  • Enhances overall engine performance by providing proper vapor flow to maintain correct air-fuel mixture.
  • Helps reduce harmful emissions and ensures compliance with environmental regulations by controlling the release of fuel vapors into the engine
  • Ensures precise operation with electromagnetic principles to control the flow of fuel vapors from the carbon canister to the engine
  • Manufactured from high quality engineered materials, resistant to fuel vapors and extreme temperatures, ensuring long lasting performance
  • Meets or exceeds all OEM specifications
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Felpro – Exhaust Gas Recirculation (EGR) Valve Gasket (Part No.73451)

Exhaust Gas Recirculation (EGR) Valve Gasket

from

$5.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered for the sealing repair environment
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
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Felpro – Exhaust Gas Recirculation (EGR) Valve Gasket (Part No.73452)

Exhaust Gas Recirculation (EGR) Valve Gasket

from

$2.29
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered for the sealing repair environment
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
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DENSO – Oxygen Sensor: Downstream, 4 Wire, 21.26" Long, Heated, Exact Fit (Part No.234-4732)

Oxygen Sensor: Downstream, 4 Wire, 21.26" Long, Heated, Exact Fit

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$103.99
DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled performance. Each component is precision built for exact replacement, and a first time fit. This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead poisoning for improved engine performance, greater fuel efficiency, and unparalleled longevity. DENSO gives you the right part and the right fit.

Product Features:
  • Specifically designed to meet the increasing demands of today’s engines
  • 100 percent checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
  • Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
  • Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
  • Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination
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Bosch – Oxygen Sensor: 4 Wire, 25.87" Long, Heated, Universal (Part No.15741)

Oxygen Sensor: 4 Wire, 25.87" Long, Heated, Universal

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$72.99
Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Includes Smart Link Connector, no soldering required
  • No special tools required for installation
  • Seared protection tube due to 100% functional quality test
  • Performance meets or exceeds OE specifications
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DENSO – Wideband Oxygen Sensor: Upstream, 4 Wire, 31.06" Long, Heated, Exact Fit (Part No.234-9034)

Wideband Oxygen Sensor: Upstream, 4 Wire, 31.06" Long, Heated, Exact Fit

from

$201.99
DENSO Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance.; Each component is precision-built for exact replacement¿ and a first time fit.; DENSO gives you the right part and the right fit¿ the first time.

Product Features:
  • Specifically designed to meet the increasing demands of today’s engines
  • 100 percent checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
  • Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
  • Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
  • Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination
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Carquest Premium – Fuel Cap Tester Adapter: (Part No.12427)

Fuel Cap Tester Adapter:

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$34.99
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:
  • BAR Certified adapters
  • Adapter check’s a fuel cap’s ability to hold pressure.
  • Adapters meet EPA standards for recommended fleet coverage.
  • Check adapter application chart for specific makes and models
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Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)

Fuel Cap Tester Adapter:

from

$17.79
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:
  • BAR Certified adapters
  • Adapter check’s a fuel cap’s ability to hold pressure.
  • Adapters meet EPA standards for recommended fleet coverage.
  • Check adapter application chart for specific makes and models
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Helping You Find the Right Fuel and Emissions Systems for Your Subaru WRX STI

You love your WRX STI. So we’ve made it easier than ever to help you find Subaru WRX STI Fuel and Emissions Systems in our online catalog. Our inventory holds 36 aftermarket and OEM Fuel and Emissions Systems for your Subaru WRX STI, ranging from $2.29 to $272.99.

We offer parts from 7 brands trusted to make quality Fuel and Emissions Systems for your Subaru WRX STI. Before you buy, take some time to read through customer reviews. We currently have 11,722 reviews of Subaru WRX STI Fuel and Emissions Systems from previous customers. Some of the top rated parts include Locking Fuel Tank Cap with 4.3 stars and Locking Fuel Tank Cap with 4.6 stars.

Find your WRX STI Fuel and Emissions Systems here, order online, and have your order shipped directly to your home. Prefer to have an in-person look at your Subaru WRX STI part to confirm it’s just right? You can find your nearest Advance Auto Parts store and confirm they have the part in stock before heading over.

Top Fuel and Emissions Systems Brands for Your Subaru WRX STI

Our inventory holds Fuel and Emissions Systems for your Subaru WRX STI from 7 trusted brands. You’ll find OEM and aftermarket parts from brands like Carquest Premium, Motorad, and Bosch, all of which can keep that Subaru happy.

Top-Rated Carquest Premium Fuel and Emissions Systems

Leading Carquest Premium Fuel and Emissions Systems

We carry Carquest Premium brand parts for your Subaru WRX STI across several catalog categories, including Gas Caps. Some of our most reviewed Carquest Premium parts include:
Non-Locking Fuel Tank Cap
from $15.49
(142)
Non-Locking Fuel Tank Cap
Gas Caps

FAQs for Subaru WRX STI Fuel and Emissions Systems

What are the most purchased Fuel and Emissions Systems for the Subaru WRX STI?

Out of 36 Fuel and Emissions Systems for the Subaru WRX STI, the most popular in our inventory are:
Non-Locking Tethered Fuel Tank Cap
from $24.29
This product is not rated
Non-Locking Tethered Fuel Tank Cap
Gas Caps
Fuel Injector Seal Kit
from $7.99
(14)
Fuel Injector Seal Kit
Fuel Injector Seal Kits

What are the top-rated Subaru WRX STI Fuel and Emissions Systems?

Top-rated Fuel and Emissions Systems for your Subaru WRX STI based on customer reviews/ratings are:
Locking Fuel Tank Cap
from $23.99
(35)
Locking Fuel Tank Cap
“It works great”
Locking Fuel Tank Cap
from $24.99
(32)
Locking Fuel Tank Cap
“Lost old gas cap and replaced with this one, which comes with a lock (which you don’t have to use,FYI)”
Non-Locking Fuel Tank Cap
from $16.99
(25)
Non-Locking Fuel Tank Cap
“Will buy again”