2021 Toyota 4Runner Fuel and Emissions Systems
Find Your Specific 2021 Toyota 4Runner Fuel and Emissions Systems
Below you will find various in-demand Toyota Fuel and Emissions Systems, components and accessories for your 2021 4Runner. Advance Auto Parts has popular 4Runner parts like Air Flow Sensors, Fuel Injectors, Oxygen Sensors and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other 4Runner model years including
2014,
2015,
2016,
2017,
2018,
2019,
2020,
2022,
2023 and more. Select a category of 2021 Toyota 4Runner Fuel and Emissions Systems below and start saving instantly.
Popular 2021 Toyota 4Runner Fuel and Emissions Systems Categories
Essential Fuel and Emissions Systems for 2021 Toyota 4Runners
Wells Vehicle Electronics – Fuel Injection Pressure Regulator (Part No.5G1362)
from
$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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Ishino – Fuel Injector O-Ring (Part No.C1012184281ISH)
from
$4.75
Fuel Injector O-Ring
DENSO – First Time Fit Air Fuel Ratio Sensor (Part No.C5015305035ND)
from
$261.34
DENSO a global supplier to automakers manufactures an OE-equivalent direct fit air fuel ratio sensor that maintains the quality and performance of the Original Equipment it replaces. DENSO continues to innovate with the latest development in air fuel ratio sensors. These components, also known as wide-band oxygen sensors, have a broader response range to provide much finer control of air/fuel mixtures over a greater variety of operating conditions.
Product Features:
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Product Features:
- Tarnish-proof platinum electrodes provides longer life and maintains accuracy
- Quick-response planar zirconia element can quickly detect oxygen concentration
- Measures A/F ratios from approximately 12:1 to 19:1
- Increased performance by mapping a/f ratios throughout rpm range
- Reduces emissions by keeping the air-fuel mixture at an optimum ratio
Delphi – Fuel Tank Cleaning Kit (Part No.FC01)
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:
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Product Features:
- Helps avoid premature fuel pump failure
- Lint free towel included
- Low suds formulation
- Removes harmful contaminants from the fuel tank
DENSO – Original Equipment Quality Fuel Pump & Strainer Kit (Part No.950-0206)
from
$295.99
As the innovator and leader in fuel supply technology, DENSO has conducted superior testing and inspection processes to insure the highest quality fuel supply product. Don’t be fooled by imitations – look for the DENSO name to be sure you’re getting the best.
Product Features:
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Product Features:
- First Time Fit
- Built to DENSO Original Equipment Standards
Carquest Premium – Fuel Pump Module Assembly: Fuel Pump, Sending Unit and Strainer (Part No.U260116)
from
$55.99
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:
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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
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 9.5" Long, Heated, Direct Fit (Part No.24663)
from
$229.99
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:
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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
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 12.3" Long, Heated, Direct Fit (Part No.24669)
from
$299.99
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:
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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
MAHLE Original – Fuel Injector Seal Kit (Part No.B45854)
from
$7.99
MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.
Product Features:
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Product Features:
- All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
- MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
- MAHLE gaskets is the leader in Domestic, Asian and European applications
- The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
NOK – Fuel Inject Cushion Ring (Part No.C1011144707NOK)
from
$5.88
Fuel Inject Cushion Ring
Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA2054)
from
$59.99
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.
Product Features:
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Product Features:
- Premium quality materials for longer service life
- Sealed connections (where applicable) to prevent environmental corrosion and performance issues
- Global coverage for import and/or domestic applications
- OE specified wire gauge to ensure a reliable electrical connection
- Designed to meet or exceed OE specifications in form, fit and function
Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA2088)
from
$47.99
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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Kibi Gaskets – Air Pipe Fitting Gas (Part No.B7043768764KIB)
from
$2.73
Air Pipe Fitting Gas
Original Equipment – Air Pipe Fitting Gas (Part No.B7043768897OEA)
from
$2.30
Air Pipe Fitting Gas
Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.61281)
from
$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:
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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
Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.60675)
from
$3.29
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:
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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
aFe POWER – Sprint Booster (Part No.77-16506)
from
$339.99
Automobiles in the 21st century have replaced the more conventional throttle cable technology for an ECM (Electronic Control Module) that translates pedal travel into electronic signals in order to provide power to the wheels. The ETC system (Electronic Throttle Control), also known as drive-by-wire, has the unfortunate downside of delayed throttle response and subdued acceleration, creating problems in certain circumstances such as up-hill starts, quick gear changes, overtaking, etc. The Sprint Booster aims to overcome this throttle response delay for ETC-equipped vehicles, providing crisp on-tap acceleration at the driver’s disposal.
Product Features:
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Product Features:
- Reduces Throttle Response Time
- Improved Acceleration
- Easy To Install
- Does Not Affect The Vehicles Electronic System
aFe POWER – Sprint Booster (Part No.77-16509)
from
$339.99
Automobiles in the 21st century have replaced the more conventional throttle cable technology for an ECM (Electronic Control Module) that translates pedal travel into electronic signals in order to provide power to the wheels. The ETC system (Electronic Throttle Control), also known as drive-by-wire, has the unfortunate downside of delayed throttle response and subdued acceleration, creating problems in certain circumstances such as up-hill starts, quick gear changes, overtaking, etc. The Sprint Booster aims to overcome this throttle response delay for ETC-equipped vehicles, providing crisp on-tap acceleration at the driver’s disposal.
Product Features:
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Product Features:
- Reduces Throttle Response Time
- Improved Acceleration
- Easy To Install
- Instant Increase In Horsepower And Torque
Carquest Premium – Remanufactured Fuel Injector (Part No.A212-1334)
from
$49.99
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:
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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
Carquest Premium – Remanufactured Fuel Injector (Part No.A212-3054)
from
$42.99
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:
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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
Carquest Premium – Vapor Canister (Part No.CPP1535)
from
$417.99
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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Aisan – Carbon Canister (Part No.B7070568026AIS)
from
$519.47
Carbon Canister
Carquest Premium – Fuel Cap Tester Adapter (Part No.12422)
from
$39.99
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Product Features:
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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
Carquest Premium – Fuel Cap Tester Adapter (Part No.12410)
from
$15.99
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Product Features:
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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
Delphi – Mass Air Flow Sensor (Part No.AF10603)
from
$125.99
100% new; Delphi OE Technology Validated to match the vehicle applications; Manufactured to meet or exceed OE requirements.
Product Features:
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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
DENSO – First Time Fit Air Mass Sensor (Part No.B3150834957ND)
from
$222.17
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:
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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
Ishino Stone – Fuel Injector O Ring (Part No.C1012184287ISH)
from
$2.16
Fuel Injector O Ring
Nippon Reinz – Fuel Injector Seal (Part No.C1010225989NRZ)
from
$2.09
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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Upgrade your 2021 Toyota 4Runner with Top-Quality Fuel and Emissions Systems
When it comes to maintaining or upgrading your 2021 Toyota 4Runner, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Toyota or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your 4Runner functioning at its best. At Advance Auto Parts, we offer a wide selection of 25 Fuel and Emissions Systems for the 2021 Toyota 4Runner, designed to meet your needs without breaking the bank.
From
Air Flow Sensor
replacements to
Fuel Injectors
upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.
Affordable Prices and Wide Selection
Shopping for Fuel and Emissions Systems for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Fuel and Emissions Systems for your 2021 Toyota 4Runner at great prices.
Our Fuel and Emissions Systems inventory for this model
ranges from just $1.85 to $1,037.99, with
an average price of $175.92.
Our 25 Fuel and Emissions Systems in stock come from 11 trusted brands, so you’re sure to find the right part for your 2021 Toyota 4Runner without overspending.
Top Brands and High Customer Satisfaction
Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2021 Toyota 4Runner, we stock popular OEM and aftermarket Fuel and Emissions Systems from top names
like Carquest Premium, and more.
Carquest Premium Fuel and Emissions Systems
start at just $4.99 and boast an impressive 4 stars average rating from customers.
With 8 customer reviews and counting, our 2021 Toyota 4Runner Fuel and Emissions Systems have a strong track record of reliability, ensuring you can trust your purchase.
Explore Related Parts and More
While you’re here, don’t forget to check out other essential categories that go hand in hand with Fuel and Emissions System upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants
and more to make sure your 2021 Toyota 4Runner is always ready to roll. We’re committed to providing you with everything you need to keep your 4Runner in top shape, all in one place.
Start shopping confidently below for your 2021 Toyota 4Runner!
Best-Selling Air Flow Sensors for 2021 Toyota 4Runners
Enhance the driving experience in your Toyota with 2 quality Air Flow Sensor components, starting at $59.99.
DENSO – Wideband Oxygen Sensor: Upstream, 4 Wire, 9.92" Long, Heated, Exact Fit (Part No.234-9143)
from
$230.99
DENSO Air/Fuel Ratio 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. DENSO gives you the right part and the right fit.
Product Features:
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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
Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA2054)
from
$59.99
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.
Product Features:
See More
Product Features:
- Premium quality materials for longer service life
- Sealed connections (where applicable) to prevent environmental corrosion and performance issues
- Global coverage for import and/or domestic applications
- OE specified wire gauge to ensure a reliable electrical connection
- Designed to meet or exceed OE specifications in form, fit and function
Most Popular 2021 Toyota 4Runner Fuel Injectors
Customize your Toyota with 12 Fuel Injectors products
like Air Flow Meters and Mass Air,
Fuel Injector Gaskets, and
Fuel Injectors, all
priced under $339.99.
Carquest Premium – Mass Air Flow Sensor (MAF) – 100% NEW (Part No.MQ6225)
from
$105.99
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:
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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
DENSO – Mass Air Flow Sensor (Part No.197-6160)
from
$169.99
DENSO’s innovative designs reduces the size and weight which allows for easy installation. Glass film coated sensing elements reduces contamination exposure and improves reliability.
Product Features:
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Product Features:
- OE technology adapted for the aftermarket
- Reduces emissions, increased performance
- Delivers the highest reliability and detection accuracy
DENSO – First Time Fit Air Mass Sensor (Part No.B3150834957ND)
from
$222.17
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:
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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
Delphi – Fuel Injection Pressure Regulator (Part No.FP10683)
from
$209.99
100 years of OE experience, supplier to the world’s top automakers, OE Heritage and knowledge built into every aftermarket part.
Product Features:
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Product Features:
- Precisely manufactured internal valves, diaphragms and springs means excellent performance under all engine operating conditions
- Quiet operation, no audible regulator noise
- Robust diaphragm materials means longer life, improved durability and compatibility with a wide range of fuels
- Consistent and predictable fuel pressure throughout system range of control provides great drivability
Delphi – Mass Air Flow Sensor (Part No.AF10347)
from
$136.99
100% new; Delphi OE Technology Validated to match the vehicle applications; Manufactured to meet or exceed OE requirements.
Product Features:
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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
Felpro – UPPER INTAKE MANIFOLD GASKET/ PLENUM GASKET (Part No.MS 97236)
from
$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:
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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
- Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
aFe POWER – Sprint Booster (Part No.77-16509)
from
$339.99
Automobiles in the 21st century have replaced the more conventional throttle cable technology for an ECM (Electronic Control Module) that translates pedal travel into electronic signals in order to provide power to the wheels. The ETC system (Electronic Throttle Control), also known as drive-by-wire, has the unfortunate downside of delayed throttle response and subdued acceleration, creating problems in certain circumstances such as up-hill starts, quick gear changes, overtaking, etc. The Sprint Booster aims to overcome this throttle response delay for ETC-equipped vehicles, providing crisp on-tap acceleration at the driver’s disposal.
Product Features:
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Product Features:
- Reduces Throttle Response Time
- Improved Acceleration
- Easy To Install
- Instant Increase In Horsepower And Torque
Carquest Premium – Remanufactured Fuel Injector (Part No.A212-3814)
from
$65.99
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:
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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
Mahle – Fuel Injector O-Ring (Part No.C1013982489MAH)
from
$29.59
Fuel Injector O-Ring
Carquest Premium – Fuel Injector Seal Kit (Part No.AS041)
from
$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:
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Product Features:
- Premium OE quality materials
- Services one injector
Kibi Gaskets – FI Throttle Body Mou (Part No.C7001268569KIB)
from
$4.09
FI Throttle Body Mou
Ishino – Fuel Injector O-Ring (Part No.C1012184276ISH)
from
$1.85
Fuel Injector O-Ring
Top Picks for 2021 Toyota 4Runner Oxygen Sensors
Upgrade Toyota 4Runners with top-quality Oxygen Sensors parts, including 2 OEM and aftermarket selections for your 2021 model.
DENSO – Oxygen Sensor (Part No.C50101559360ND)
from
$156.71
Oxygen Sensor
DENSO – Oxygen Sensor (Part No.234-8005)
from
$91.99
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.
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In-Demand Fuel Tanks for 2021 Toyota 4Runners
Select from 1 premium Fuel Tanks parts for your 2021 Toyota 4Runner.
Delphi – Fuel Tank Cleaning Kit (Part No.FC01)
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:
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Product Features:
- Helps avoid premature fuel pump failure
- Lint free towel included
- Low suds formulation
- Removes harmful contaminants from the fuel tank
Most Sold 2021 Toyota 4Runner Fuel Pumps
Explore our best-selling Toyota parts for the 2021 4Runner among 6 OEM and aftermarket options starting from $15.99.
Carquest Premium – Fuel Pump Module Assembly M2542523: Fuel Pump, Sending Unit and Strainer (Part No.M2542523)
from
$483.99
Carquest Premium fuel pump modules and assemblies are engineered by Carter Fuel Systems or Agility Auto Parts to meet or exceed Original Equipment (OE) specifications for fit, form and function. We have invested in industry-leading quality improvements like upgraded turbine impellers and 100% carbon commutators to deliver greater reliability. Carquest Premium fuel pump modules are supplied with the pump strainer and gaskets or seals when required for the application. Carquest Premium fuel pump modules are engineered with superior quality components to provide the longest life and reliable performance.
Product Features:
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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
- Includes installation gaskets or seals where applicable
Delphi – Fuel Pump Module Assembly: With Float Arm (Part No.FG1763)
from
$1037.99
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:
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Product Features:
- Delphi is a global OE manufacturer and all fuel pumps are built to Delphi’s OE standards
- Empty float height and float retention matches OE specifications and guarantees correct gas gauge reading
- Lower amperage draws less load on vehicle’s electrical system
- Part is validated, tested and matched to the right vehicle application
- Always be sure to check and clean fuel tank to avoid unnecessary returns
- Lower failure rates due to its innovative design and durability
Delphi – Electric Fuel Pump and Strainer Set: 12V, With 2 Male Blade Terminals, External Strainer (Part No.FE0554)
from
$266.99
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:
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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
- When servicing the fuel system, always check the fuel filter for possible replacement
- Always be sure to check and clean fuel tank to avoid unnecessary returns
- Always replace the fuel strainer when doing a fuel pump repair
Bosch – Original Equipment Replacement Electric Fuel Pump (Part No.E30091522480BOS)
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$224.22
Bosch state-of-the-art turbine fuel pumps offer many advantages when compared to older roller-cell and inner-gear pump designs. Not only do these pumps offer near silent operation and improved drivability, the core components of this turbine design significantly reduce wear and deliver a longer service life. That’s an important consideration when choosing a replacement fuel pump. You can install Bosch Turbine Fuel Pumps with complete confidence. They’re nearly identical in dimension and appearance to the units they replace for a precise fit every time. Plus, application-specific, illustrated step-by-step instructions are included with all Bosch Turbine Fuel Pumps for safe and easy installation.
Product Features:
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Product Features:
- Superior turbine pump design virtually eliminates fuel pulsation
- Bosch impeller ring provides smooth fuel flow
- Precision, spin-balanced and polymer-encased armature reduces noise and vibration
- Premium carbon brushes, utilizing advanced materials provides longer, reliable service life
- Noise suppression coil virtually eliminates radio frequency interference
Carquest Premium – Fuel Cap Tester Adapter (Part No.12427)
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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:
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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
Carquest Premium – Fuel Cap Tester Adapter (Part No.12410)
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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:
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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
Top-Rated Fuel and Emissions Systems Brands For Your 2021 Toyota 4Runner
Shop for the best-rated brands offering Fuel and Emissions Systems and other products for your 2021 Toyota 4Runners. Below you’ll find some of our best rated Fuel and Emissions Systems from Carquest Premium, and more. Fuel and Emissions Systems from these brands that fit a 2021 4Runner start at just $4.99 and are rated as high as 4 stars. OEM and aftermarket Fuel and Emissions Systems don’t get more top quality, durable, and affordable than from the brands below.
Popular Carquest Premium 2021 Toyota 4Runner Fuel and Emissions Systems
When it comes to maintaining or upgrading your 2021 Toyota 4Runner, using quality Fuel and Emissions Systems is essential to ensure durability and a perfect fit. Carquest Premium ticks all of those boxes. We offer a wide selection of Carquest Premium Fuel and Emissions Systems, specifically designed for the 2021 Toyota 4Runner. With over 7 Carquest Premium brand Fuel and Emissions Systems in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $4.99, with an average price of just $110.28. Plus, with over 2 customer reviews and an average rating of 4 stars, you can trust that our Carquest Premium Fuel and Emissions Systems will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.
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$483.99
$483.99
This product is not rated
Fuel Pump Module Assembly M2542523: Fuel Pump, Sending Unit and Strainer
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FAQs for 2021 Toyota 4Runner Fuel and Emissions Systems
Which Fuel and Emissions Systems are best-sellers for 2021 Toyota 4Runners?
Out of 25 Fuel and Emissions Systems that fit 2021 Toyota 4Runners, the following parts are the top sellers:
- Fuel Tank Cleaning Kit (11692237) – $12.49
- Mass Air Flow Sensor (10115668) – $169.99
- First Time Fit Air Mass Sensor (11648094) – $222.17
What’s the price range for 2021 Toyota 4Runner Fuel and Emissions Systems?
Fuel and Emissions System prices for the 2021 Toyota 4Runner start at $1.85 and go up to $1,037.99 for the most premium parts.
What’s the average price of a Fuel and Emissions System for a 2021 Toyota 4Runner?
The average price for Fuel and Emissions Systems for the 2021 Toyota 4Runner is $175.92. Keep in mind the variety of part types within our Fuel and Emissions System category so you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Fuel and Emissions Systems for other Toyota 4Runner model years?
What are the cheapest Fuel and Emissions Systems for my 2021 Toyota 4Runner?
The cheapest 2021 Toyota 4Runner Fuel and Emissions Systems we carry in stock are:
- Fuel Injector O-Ring (10740166) – $1.85
- Air Pipe Fitting Gas (12064552) – $2.30
- FI Throttle Body Mou (12589340) – $4.09
- Fuel Injector Seal Kit (11692578) – $4.99
- Fuel Tank Cleaning Kit (11692237) – $12.49
What types of Fuel and Emissions Systems do you sell for my 2021 Toyota 4Runner?
As of 2/5/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 2021 Toyota 4Runner:
Can I get help with 2021 Toyota 4Runner Fuel and Emissions System orders?
Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Toyota Fuel and Emissions Systems and more.
What is your return policy for Toyota 4Runner Fuel and Emissions Systems?
Advance Auto Parts keeps returns simple. For new Toyota 4Runner Fuel and Emissions Systems and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.
