2003 Toyota 4Runner Fuel and Emissions Systems

Essential 2003 Toyota 4Runner Fuel and Emissions Systems

Carquest Premium – Fuel Cap Tester Adapter (Part No.12422)

Fuel Cap Tester Adapter

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$39.99
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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Spectra Premium – Fuel Filler Neck (Part No.FN607)

Fuel Filler Neck

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$135.99
Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium fuel tank filler necks meet or exceed the performance of the original equipment they replace.

Product Features:
  • Unit is designed to OE fit, form and function requirements accomplished by leveraging our OE fuel system design expertise
  • Unit is dual coated for enhanced corrosion protection
  • Fit tested on the very same vehicle application for which it was developed verifying first-hand that the design fits properly and can be easily installed
  • Unit is leak tested after production to ensure product in free from fuel and / or evaporative leaks
  • Tested with OE fuel cap to prevent evaporative emission and check engine light failure
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Bosch – Oxygen Sensor: 4 Wire, 10.63" Long, Heated, Exact Fit (Part No.13441)

Oxygen Sensor: 4 Wire, 10.63" Long, Heated, Exact Fit

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$92.99
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 advancements. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.  Bosch oxygen sensors deliver exceptional OE level reliability, performance and durability, further improving service life of the product. 

Product Features:
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
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Aisan – Carbon Canister (Part No.B7070568026AIS)

Carbon Canister

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$430.50
Carbon Canister

Wells Vehicle Electronics – Fuel Injection Pressure Damper (Part No.3G1067)

Fuel Injection Pressure Damper

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$89.99
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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Carquest – Fuel Injector Seal Kit (Part No.274712)

Fuel Injector Seal Kit

from

$5.99
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
  • State-of-the-art designs that meet or exceed OE specifications
  • Top-of-the-line quality and performance
  • With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues
  • BWD is a global manufacturer of original equipment and aftermarket fuel injection products, complete quality control is maintained through the manufacturing process from componentry to finished product
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Wells Vehicle Electronics – Fuel Injection Pressure Regulator (Part No.5G1362)

Fuel Injection Pressure Regulator

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$175.99
WVE is a leading source of advanced vehicle electronics components for replacement applications in the automotive aftermarket and original equipment applications. WVE offers high-technology manufacturing along with innovative solutions and improvements to
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Carquest Premium – Mass Air Flow Sensor (MAF) – 100% NEW (Part No.MQ7359)

Mass Air Flow Sensor (MAF) - 100% NEW

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$109.99
Advance Auto Parts is proud to carry all new mass air flow sensors that use high-quality components with the highest quality standards.

Product Features:
  • CARQUEST MAF use all new high-quality components at the highest quality standards.
  • Manufactured with new and advanced technology to perform, fit and function at OE specifications.
  • All new product that is tested with OEM equipment to OEM standards
  • Outperforms competition when tested in extreme environmental conditions
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Carquest Premium – Fuel Injector Seal Kit (Part No.AS041)

Fuel Injector Seal Kit

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$4.99
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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Dorman – Evaporative Emissions Purge Valve (Part No.994-066)

Evaporative Emissions Purge Valve

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$143.99
Engineered for a perfect fit and plug-and-play installation, this vapor canister purge valve is a direct replacement for the original equipment purge valve. It is critical to the evaporative emissions system and fulfills government requirements.

Product Features:
  • Direct replacement – this vapor canister purge valve fits and functions like original equipment to ensure proper function of your vehicle’s evaporative emissions system
  • Quality construction – manufactured from premium materials for a long service life
  • Excellent value – original equipment quality at a lower price
  • Quality tested – has undergone testing to ensure proper fit and performance
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Nippon Reinz – Fuel Injector Seal (Part No.C1010225989NRZ)

Fuel Injector Seal

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$2.08
NIPPON REINZ engineers work with OEMs to develop complete engine sealing solutions for gasoline, diesel, and alternative energy vehicles. We employ custom sealing solutions through our expert problem solving utilizing our regional research and development centers. As an Integral Partner with Virtually Every major vehicle and engine manufacturer worldwide, NIPPON REINZ offers a comprehensive range of sealing Innovative Systems, INCLUDING Head gaskets, Heat shields, sealing modules, secondary gaskets, Valve stem Seals, and transmission components.
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DENSO – Universal Oxygen Sensor (Part No.C5010121673ND)

Universal Oxygen Sensor

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$103.89
Denso Universal First Time Fit oxygen sensors are constructed of the highest quality materials available. High-quality stainless steel, porous polytetrafluoroethylene (PTFE), fluorine rubber, aluminum oxide, high-grade platinum and ceramics are used in each DENSO sensor. Denso First Time Fit oxygen sensors are coated with a special formulation of aluminum oxide to trap impurities outside of the ceramic element. In head-to-head testing against the leading competitors, DENSO oxygen sensors were rated two times more resistant to silicone and lead poisoning.

Product Features:
  • SUPERIOR DESIGN – Maximizes engine performance and fuel efficiency while reducing harmful emissions.
  • DOUBLE-PROTECTION COVER – Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
  • ALUMINUM-OXIDE TRAP LAYER – Keeps silicone and lead outside the ceramic element through DENSO’s exclusive design, preventing damage to the platinum electrode.
  • STAINLESS STEEL HOUSING – Resists corrosion and contamination with a rugged, watertight body.
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Carquest Premium – Vapor Canister Purge Solenoid (Part No.CPA2742)

Vapor Canister Purge Solenoid

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$151.99
Vapor Canister Purge Solenoid

Dorman – Fuel Tank Strap (Part No.E2007960048DOR)

Fuel Tank Strap

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$59.35
Fuel Tank Strap

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

Fuel Tank Cleaning Kit

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$12.49
To perform a complete fuel pump replacement, clean the tank every time. Order the Delphi Fuel Tank Cleaning Kit (Part FC01). Remember, the original pump went into a clean fuel tank, to ensure the same level of performance, the new pump should too. 100 ye

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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Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.61281)

Fuel Injection Throttle Body Mounting Gasket

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$22.99
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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Spectra Premium – STRAINER (Part No.STR17)

STRAINER

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$9.79
CARQUEST gradient density fuel pump strainers deliver reliable filtration and are the first line of defense against fuel system contaminants.

Product Features:
  • Gradient density provides optimum multi-depth layering of filter media specific for each application
  • Maximum filtering for increased fuel filter, fuel pump and fuel system life
  • New strainer required to validate new fuel pump warranty.
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DENSO – Manifold Absolute Pressure Sensor (Part No.198-1003)

Manifold Absolute Pressure Sensor

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$193.99
DENSO’s MAP sensors offer leading edge sensing technology which helps controls fuel injection more precisely. They are compact lightweight and designed with fewer connections improving performance and reliability. DENSO’s MAP sensors have high detection accuracy which reduces emissions.

Product Features:
  • OE technology adapted for the aftermarket
  • Reduces emissions, increased performance
  • Delivers the highest reliability and detection accuracy
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Carquest Premium – Circuit Opening Relay (Part No.RAC1837)

Circuit Opening Relay

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$99.99
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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Carquest Premium – Multi Purpose Relay (Part No.RAC1529)

Multi Purpose Relay

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$29.49
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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NOK – Fuel Inject Cushion Ring (Part No.C1011144707NOK)

Fuel Inject Cushion Ring

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$5.92
Fuel Inject Cushion Ring

Ishino – Fuel Inject Cushion Ring, Grommet (Part No.C1011189045ISH)

Fuel Inject Cushion Ring, Grommet

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$2.20
Fuel Inject Cushion Ring, Grommet

Delphi – Electric Fuel Pump: 12V, In Tank, Turbine Design (Part No.FE0526)

Electric Fuel Pump: 12V, In Tank, Turbine Design

from

$289.99
100 years of OE experience, supplier to the world’s top automakers, OE Heritage and knowledge built into every aftermarket part, comprehensive portfolio for a wide range of vehicles and model years.

Product Features:
  • Delphi is a global OE manufacturer and all fuel pumps are built to Delphi’s OE standards
  • Delphi pumps are designed to operate under extreme temperatures with quick engine starts and to avoid low-fuel hesitation, including alcohol fuels and blends
  • Improved pump performance as a result of Delphi’s innovative design and durability
  • Restores fast pressure performance and system integrity, translating to better pumping through less energy
  • Part is validated, tested and matched to the right vehicle application
  • Lower amperage draws less load on vehicle’s electrical system
  • Always be sure to check and clean fuel tank to avoid unnecessary returns
  • Always replace the fuel strainer when doing a fuel pump repair
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Carquest Premium – Fuel Pump Hanger Assembly: Fuel Pump, Sending Unit and Strainer (Part No.E635399)

Fuel Pump Hanger Assembly: Fuel Pump, Sending Unit and Strainer

from

$108.99
Carquest Premium electric fuel pumps are engineered by Carter Fuel Systems or Agility Auto Parts to meet or exceed Original Equipment (OE) specifications for fit, form and function. Our Carquest Premium fuel pumps are built to be installed in the Original Equipment module or assembly. We have invested in industry-leading quality upgrades, like upgraded turbine impellers and 100% carbon commutators, to deliver greater reliability. Carquest Premium electric fuel pumps are engineered with superior quality components to provide the longest life and reliable performance.

Product Features:
  • Meets or exceeds OE specifications for fit, form and function
  • 100% carbon commutators provide resistance to aggressive fuels and double the life expectancy of the pump
  • OE upgraded turbine impellers greatly reduce fuel pulsation
  • All fuel pumps are 100% performance tested
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Carquest Premium – Fuel Cap: 10839, Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10839)

Fuel Cap: 10839, Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack

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$20.79
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:
  • 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: 10595, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10595)

Locking Fuel Cap: 10595, Screw On, Direct Fit, Provides Tight Seal, 1 Pack

from

$21.99
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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Carquest – Fuel Injector (Part No.67248)

Fuel Injector

from

$156.05
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
  • Stainless steel calibration slide and spring assembly prevents corrosion within the fuel control body leading to an extended service life
  • Precision wound and trimmed solenoid windings allow the computer to command efficient delivery of fuel
  • High-temp Viton O-rings enable prolonged sealing of injector under extreme heat conditions
  • Fiber optic yttrium aluminum garnet “YAG” laser welding and 100 million cycle testing ensure quality in every box
  • With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues
  • BWD is a global manufacturer of original equipment and aftermarket fuel injection products, complete quality control is maintained through the manufacturing process from componentry to finished product
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Aisan – Aisan Fuel Injector (Part No.C1000458930AIS)

Aisan Fuel Injector

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$80.19
Aisan fuel injectors are manufactured to OE requirements that meet federal emissions and fuel economy standards, and provide exact OE fit for ease of installation. Aisan injectors are manufactured using internal components that are compatible with alternative fuels or fuel blends, including ethanol mixtures.

Product Features:
  • Original Equipment Manufacturer
  • Premium internal components
  • OE Calibrated impedance
  • Fine atomized spray reduces emissions
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2003 Toyota 4Runner Fuel and Emissions Systems

You count on your 2003 Toyota 4Runner to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Fuel and Emissions Systems. With 81 Fuel and Emissions Systems ranging in price from $1.74 to $602.99, you’re sure to find everything you need for your 2003 Toyota 4Runner.

Brands matter. If you want to shop a specific Fuel and Emissions Systems brand, we stock 21 different brands like Carquest Premium, Bosch, and DENSO. 2003 Toyota 4Runner Fuel and Emissions Systems start as low as $1.74!

One of the best ways to find top quality OEM or aftermarket Fuel and Emissions Systems is by asking professionals. Short of that, you can shop with confidence thanks to our 3,432 extensive product reviews on 2003 Toyota 4Runner Fuel and Emissions Systems. Some of the top-rated Fuel and Emissions Systems products we carry are Mass Air Flow Sensor with 4.6 stars and Oxygen Sensor: 4 Wire, 14.57" Long, Heated, Exact Fit with 3.8 stars.

Did we mention you can order your Fuel and Emissions Systems from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Fuel and Emissions Systems inventory for your 2003 Toyota 4Runner below to get started!

Top-Rated Fuel and Emissions Systems Brands For Your 2003 Toyota 4Runner

Trusted Fuel and Emissions Systems OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2003 Toyota 4Runner running right for years to come. In our inventory you’ll find brands like Carquest Premium, Bosch, DENSO, and even more.

Popular Felpro Fuel and Emissions Systems

You’ll find popular Felpro brand products across Fuel Injectors. All are waiting to get your 2003 Toyota 4Runner back on the road. Some of the top-rated Felpro products in these categories are:
UPPER INTAKE MANIFOLD GASKET/ PLENUM GASKET
from $12.99
(1)
UPPER INTAKE MANIFOLD GASKET/ PLENUM GASKET
Fuel Injector Gaskets
Fuel Injection Throttle Body Mounting Gasket
from $22.99
(1)
Fuel Injection Throttle Body Mounting Gasket
Fuel Injector Gaskets

Top-Rated DENSO Fuel and Emissions Systems


If DENSO are what you’re looking for, our inventory holds plenty. We stock DENSO brand Fuel and Emissions Systems for your 2003 Toyota 4Runner, and some of our most reviewed DENSO parts include:

FAQs for 2003 Toyota 4Runner Fuel and Emissions Systems

What are the most purchased Fuel and Emissions Systems for the 2003 Toyota 4Runner?

Out of 81 Fuel and Emissions Systems for the 2003 Toyota 4Runner, the most popular in our inventory are:
Mass Air Flow Sensor (MAF) - 100% NEW
from $92.99
(6)
Mass Air Flow Sensor (MAF) – 100% NEW
Air Flow Meters and Mass Air

What are the top-rated 2003 Toyota 4Runner Fuel and Emissions Systems?

Top-rated Fuel and Emissions Systems for your 2003 Toyota 4Runner based on customer reviews/ratings are:
Mass Air Flow Sensor
from $69.99
(16)
Mass Air Flow Sensor
“It was easy to shop and couldn’t beat the price offered”
Oxygen Sensor: 4 Wire, 14.57" Long, Heated, Exact Fit
from $104.99
(15)
Oxygen Sensor: 4 Wire, 14.57" Long, Heated, Exact Fit
“I actually installed two oxygen sensors in my 6 cyl Toyota. One was on the backside manifold near the firewall and difficult to get to, but installed”
Tethered Locking Fuel Cap: 10509, Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack
from $30.49
(8)
Tethered Locking Fuel Cap: 10509, Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack
“Fix real easy good customer service”