2003 Subaru Legacy Air Flow Sensors

Essential 2003 Subaru Legacy Air Flow Sensors

NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 19.8" Long, Heated, Direct Fit (Part No.24831)

Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 19.8" Long, Heated, Direct Fit

from

$190.99
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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NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 9.5" Long, Heated, Direct Fit (Part No.24663)

Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 9.5" Long, Heated, Direct Fit

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:
  • 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
See More

DENSO – Wideband Oxygen Sensor: Upstream, 4 Wire, 7.64" Long, Heated, Exact Fit (Part No.234-9092)

Wideband Oxygen Sensor: Upstream, 4 Wire, 7.64" Long, Heated, Exact Fit

from

$216.99
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, 22.8" Long, Heated, Direct Fit (Part No.24696)

Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 22.8" Long, Heated, Direct Fit

from

$147.99
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
See More

DENSO – Wideband Oxygen Sensor: Upstream, 4 Wire, 20.47" Long, Heated, Exact Fit (Part No.234-9015)

Wideband Oxygen Sensor: Upstream, 4 Wire, 20.47" Long, Heated, Exact Fit

from

$209.99
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
See More

DENSO – Wideband Oxygen Sensor: Upstream, 4 Wire, 22.44" Long, Heated, Exact Fit (Part No.234-9098)

Wideband Oxygen Sensor: Upstream, 4 Wire, 22.44" Long, Heated, Exact Fit

from

$211.99
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
See More

Walker – Walker Air Fuel Ratio Sensor (Part No.C5015380864WKR)

Walker Air Fuel Ratio Sensor

from

$257.28
Walker manufactures an OE-equivalent direct fit air fuel ratio sensor that maintains the quality and performance of the Original Equipment it replaces.

Product Features:
  • Tarnish-proof platinum electrodes
  • Base ceramic probe of Zirconium and Yttrium
  • Patented Platinum Power Grid
  • Fine particle filter Installation Notes: Vehicles equipped with Air Fuel Ratio Sensors may look very similar to the Oxygen Sensor. Please confirm the correct part before ordering and if the connector does not match, do not install.
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Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA1548)

Ambient Air Temperature Sensor

from

$33.99
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 – Ambient Air Temperature Sensor (Part No.WTA1334)

Ambient Air Temperature Sensor

from

$11.99
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 – Ambient Air Temperature Sensor (Part No.WTA1872)

Ambient Air Temperature Sensor

from

$49.99
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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Dorman – Air Mass Meter Intake Boot (Part No.B3132337945DOR)

Air Mass Meter Intake Boot

from

$46.95
Return your air intake system to proper functioning with Dorman’s Air Intake Hose. Constructed of high-quality rubber, the hose resists the drying and cracking that commonly cause check engine lights and drivability issues.

Product Features:
  • Direct replacement for a proper fit every time
  • Designed to accommodate all necessary PCV and emission fittings
  • Hose slides on easily for trouble-free installation
  • Rigorous quality control measures have been undertaken to ensure that this part conforms to product standards
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FAE – Intake Air Temperature Sensor (Part No.C6000271665FAE)

Intake Air Temperature Sensor

from

$45.46
The FAE Intake Air Temperature Sensor is an ideal high quality aftermarket replacement that is manufactured to meet or exceed OE specifications for fit, form, and function.

Product Features:
  • Premium aftermarket replacement
  • Provides performance and dependability
  • Manufactured to meet OE specifications
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Delphi – Air Charge Temperature Sensor (Part No.TS10029)

Air Charge Temperature Sensor

from

$68.99
Delphi temperature sensors are built with the latest OE technology; Delphi temperature sensors use durable, one-piece design; Delphi temperature sensors are impervious to electrical noise and interference.

Product Features:
  • Delphi temperature sensors are built with the latest OE technology
  • Delphi temperature sensors are impervious to electrical noise and interference
  • Part is validated, tested and matched to the right vehicle application
  • Delphi temperature sensors feature a one-piece lead-frame design from sensing element tip to connector terminals to help eliminate internal connectors and failure points
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2003 Subaru Legacy Air Flow Sensors

Maybe you’re in the middle of a full rebuild of that 2003 Subaru Legacy. Maybe you just need a couple of Air Flow Sensors. Either way, Advance Auto Parts has 7 different Air Flow Sensors in our inventory ranging from $33.99 to $301.50. That means you can find the exact parts or products you need to keep that 2003 Subaru Legacy running smoothly.

Air Flow Sensors are only as good as their brand. We stock 5 different brands to make sure you have plenty of trusted parts to choose from for your 2003 Subaru Legacy. DENSO, FAE, and Carquest Premium are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Air Flow Sensors for your 2003 Subaru Legacy, but don’t take our word for it – read our customer ratings and reviews and buy with confidence.

So if you’re in the market for aftermarket Air Flow Sensors to keep your 2003 Subaru Legacy rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Air Flow Sensors Brands To Make Your 2003 Subaru Legacy Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 2003 Subaru Legacy demands trusted brand parts and products to keep it running. Many trusted brands of Air Flow Sensors make up Advance Auto Parts’ inventory, and all are ready to help make your Legacy the best it can be. Be sure to browse some of our top Air Flow Sensors brands and parts.

FAQs for 2003 Subaru Legacy Air Flow Sensors

What are the most purchased Air Flow Sensors for the 2003 Subaru Legacy?

Out of 7 Air Flow Sensors for the 2003 Subaru Legacy, the most popular in our inventory are:
Intake Air Temperature Sensor
from $45.46
(1)
Intake Air Temperature Sensor
Air Charge Temperature Sensors
Ambient Air Temperature Sensor
from $33.99
This product is not rated
Ambient Air Temperature Sensor
Ambient Air Temperature Sensors
Ambient Air Temperature Sensor
from $49.99
This product is not rated
Ambient Air Temperature Sensor
Ambient Air Temperature Sensors