2021 Mazda CX-9 Air Flow Sensors

Keep Your 2021 Mazda CX-9 in Top Shape with Quality Air Flow Sensors

Whether you’re repairing or upgrading your Air Flow Sensor, using high-quality parts is key to keeping your 2021 Mazda CX-9 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Air- Fuel Ratio Sensors, Manifold Air Pressure Sensors, and Ambient Air Temperature Sensors. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Competitive Prices and Extensive Inventory

The average price for a 2021 Mazda CX-9 Air Flow Sensor at Advance Auto Parts is around $163.66, with a range that starts at $94.99 and goes up to $235.99. With 3 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Manifold Absolute Pressure Sensor (MAP), Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 10.63", and Ambient Air Temperature Sensor start at just $94.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Air Flow Sensor, don’t forget to check out other key components like Gas Caps and Oxygen Sensors. At Advance Auto Parts, we’re here to help you keep your 2021 Mazda CX-9 in peak condition, inside and out.

Essential 2021 Mazda CX-9 Air Flow Sensors

NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 11.5" Long, Heated, Direct Fit (Part No.24387)

Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 11.5" Long, Heated, Direct Fit

from

$162.99
NGK 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, 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: 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, Oxygen Sensors offer superior OE fit, form, function
  • OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
  • ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
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DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 11.57" Long, Heated, Exact Fit (Part No.234-5038)

Wideband Oxygen Sensor: Upstream, 5 Wire, 11.57" Long, Heated, Exact Fit

from

$124.99
DENSO Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance.; Each component is precision-built for exact replacement¿ and a first time fit.; DENSO gives you the right part and the right fit¿ the first time.

Product Features:
  • Specifically designed to meet the increasing demands of today’s engines
  • 100 percent checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
  • Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
  • Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
  • Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination
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DENSO – Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 10.63" (Part No.234-5733)

Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 10.63"

from

$235.99
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.
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Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA1996)

Ambient Air Temperature Sensor

from

$94.99
The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
  • Application matched components ensures system operation in like new condition.
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Most Popular Air- Fuel Ratio Sensor for 2021 Mazda CX-9s

Enhance your 2021 Mazda CX-9 with this popular Air- Fuel Ratio Sensor we have in stock, for $235.99.

DENSO – Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 10.63" (Part No.234-5733)

Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 10.63"

from

$235.99
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.
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Best-Selling 2021 Mazda CX-9 Manifold Air Pressure Sensor

Upgrade your CX-9 with our best-selling Manifold Air Pressure Sensor.

Carquest Premium – Manifold Absolute Pressure Sensor (MAP) (Part No.ECA2469)

Manifold Absolute Pressure Sensor (MAP)

from

$159.99
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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Top-Quality Ambient Air Temperature Sensors for 2021 Mazda CX-9s

Choose a high-quality OEM or aftermarket Ambient Air Temperature Sensor for Mazda CX-9s and enjoy top-notch performance from $94.99.

Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA1996)

Ambient Air Temperature Sensor

from

$94.99
The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
  • Application matched components ensures system operation in like new condition.
See More

FAQs for 2021 Mazda CX-9 Air Flow Sensors

What are the best-selling Air Flow Sensors for 2021 Mazda CX-9s?

Out of 3 Air Flow Sensors that fit 2021 Mazda CX-9s, the following parts are the top sellers:

What’s the price range for 2021 Mazda CX-9 Air Flow Sensors?

The prices of Air Flow Sensors for the 2021 Mazda CX-9 range from $94.99 up to $235.99 for the most premium parts.

What is the average price of an Air Flow Sensor for a 2021 Mazda CX-9?

The average price for Air Flow Sensors for the 2021 Mazda CX-9 is $163.66. Keep in mind the variety of part types within our Air Flow Sensor category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Air Flow Sensors for other Mazda CX-9 model years?

Yes, we carry Air Flow Sensors for 11 model years of Mazda CX-9s between 2011 and 2023. The following model years are the most popular for Air Flow Sensor purchases: 2022, 2020, 2019, 2018, 2017, 2016, 2015, 2014, and 2013.

What are the cheapest Air Flow Sensors for my 2021 Mazda CX-9?

The cheapest 2021 Mazda CX-9 Air Flow Sensors we carry are:

Does Advance Auto Parts sell Air Flow Sensors for any other 2021 Mazda models?

Yes. We stock Air Flow Sensors for 3 other popular 2021 Mazda models. Some of the most popular are 2021 6 Air Flow Sensors, 2021 CX-5 Air Flow Sensors, 2021 MX-5 Miata Air Flow Sensors, and 2021 CX-3 Air Flow Sensors.

What types of Air Flow Sensors do you sell for my 2021 Mazda CX-9?

As of 11/2/25, these are some of the most in-demand types of Air Flow Sensors for a 2021 Mazda CX-9:

Can I get help with 2021 Mazda CX-9 Air Flow Sensor orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mazda Air Flow Sensors and more.

What is your return policy for Mazda CX-9 Air Flow Sensors?

Advance Auto Parts keeps returns simple. For new Mazda CX-9 Air Flow Sensors and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.