Subaru WRX STI Fuel and Emissions Systems

Essential Subaru WRX STI Fuel and Emissions Systems

Ishino – Fuel Injector Seal (Part No.C1010260656ISH)

Fuel Injector Seal

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$5.81
Fuel Injector Seal

Ishino Stone – Fuel Injector O Ring (Part No.C1012251371ISH)

Fuel Injector O Ring

from

$5.60
Fuel Injector O Ring

Delphi – Fuel Tank Cleaning Kit (Part No.FC01)

Fuel Tank Cleaning Kit

from

$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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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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$98.99
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 posining for improved engine performance, greater fuel efficiency, and unparalleled longevity. 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% 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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Dorman – Turbo Boost Solenoid (Part No.B4082959876DOR)

Turbo Boost Solenoid

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$51.37
Turbo Boost Solenoid

Original Equipment – Aux. Air Valve Gaske (Part No.B3060946151OEA)

Aux. Air Valve Gaske

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$2.54
Aux. Air Valve Gaske

Felpro – O-RING (Part No.71857)

O-RING

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$3.99
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
  • Design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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DENSO – First Time Fit Air Mass Sensor (Part No.B3150289033ND)

First Time Fit Air Mass Sensor

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$219.34
Denso manufactures an air mass sensor that is engineered to exact OEM specifications for quality, fit and performance. The Denso Air Mass Sensor provides exceptional reliability by incorporating a platinum coated sensing element with a glass film to protect the sensor from contaminants. Denso prevents errors caused by air pulsations produced in the intake air pipe by integrating the control circuit within the top of the air flow sensor so that only the small bypass passage structure with the sensing element is inserted into the intake air pipe, resulting in higher detection accuracy and performance.

Product Features:
  • OEM Quality Direct fit Application
  • Platinum coated sensing element
  • Meets or exceeds OEM specifications
  • Utilizes the factory style mounts, connectors and fittings
  • Provides exceptional reliability
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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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Ishino – Fuel Inject Cushion Ring (Part No.C1011144317ISH)

Fuel Inject Cushion Ring

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$2.17
Fuel Inject Cushion Ring

Carquest Premium – Vapor Canister Purge Solenoid (Part No.CPC2493)

Vapor Canister Purge Solenoid

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$64.99
Carquest premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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Felpro – Fuel Injector O-Ring Kit (Part No.ES 73204)

Fuel Injector O-Ring Kit

from

$12.99
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 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 Set (Part No.ES 73202)

Fuel Injector O-Ring Set

from

$6.49
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 for the sealing repair environment
  • Unsurpassed quality you can trust
  • Validated for fit, form, and function
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Carquest Premium – Locking Fuel Cap: 10504, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10504)

Locking Fuel Cap: 10504, Screw On, Direct Fit, Provides Tight Seal, 1 Pack

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$21.79
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:
  • 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 – Locking Fuel Cap: 10507, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10507)

Locking Fuel Cap: 10507, Screw On, Direct Fit, Provides Tight Seal, 1 Pack

from

$22.99
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:
  • 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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Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.61359)

Fuel Injection Throttle Body Mounting Gasket

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$6.79
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 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

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$15.99
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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Original Equipment – EGR Tube Gasket (Part No.B7018946152OEA)

EGR Tube Gasket

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$2.65
EGR Tube Gasket

Felpro – EGR MOUNTING SET (Part No.73451)

EGR MOUNTING SET

from

$4.79
EGR MOUNTING SET

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

$199.99
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% 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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NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 31.5" Long, Heated, Direct Fit (Part No.24821)

Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 31.5" Long, Heated, Direct Fit

from

$195.99
NTK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. While conventional switching oxygen sensors only switch rich or lean, wideband oxygen (or Air-Fuel Ratio) sensors produce a linear output signal that allows the ECU determine exactly how rich or lean an engine is running and make continuous and precise adjustments of the air-fuel mixture to stay closest to stoichiometric, providing the best possible combustion and fewest emissions. A ceramics company at our core, NTK uses state-of-the art technology enabling complete control of the ceramics used in our wideband oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:
  • OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
  • PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
  • OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
  • EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
  • EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
  • ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
  • NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
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Original Equipment – Fuel Injector: Exact OE Fit, OE Performance, Reduced Emissions (Part No.C1000194564OEA)

Fuel Injector: Exact OE Fit, OE Performance, Reduced Emissions

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$114.46
The Original Equipment brand is the same OEM quality and performance of the original equipment it replaces and is supplied in a plain box, with the car manufacturer’s logo on the part. Original Equipment fuel injectors are manufactured to OE requirements that meet federal emissions and fuel economy standards, and provide exact OE fit for ease of installation.

Product Features:
  • Original Equipment Manufacturer
  • Premium internal components
  • OE Calibrated impedance
  • Fine atomized spray reduces emissions
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Carquest Premium – Reman Multi Port Fuel Injector (Part No.A212-3414)

Reman Multi Port Fuel Injector

from

$46.99
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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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 43 aftermarket and OEM Fuel and Emissions Systems for your Subaru WRX STI, ranging from $2.17 to $1,020.43.

We offer parts from 12 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 11,492 reviews of Subaru WRX STI Fuel and Emissions Systems from previous customers. Some of the top rated parts include Locking Fuel Cap with 4.3 stars and Locking Fuel Cap: 10501, Screw On, Direct Fit, Provides Tight Seal, 1 Pack 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 12 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:

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 43 Fuel and Emissions Systems for the Subaru WRX STI, the most popular in our inventory are:
Oxygen Sensor: 4 Wire, 25.87" Long, Heated, Universal
from $61.99
This product is not rated
Oxygen Sensor: 4 Wire, 25.87" Long, Heated, Universal
Oxygen Sensors

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 Cap
from $23.99
(35)
Locking Fuel Cap
“Had a check engine light and when I scanned it, calls for a new gas cap. Instead of buying oem from the dealer or just an ordinary gas cap from a part”