NTK
Direct Fit 5-Wire A/F Sensor

NTK 24357 Air / Fuel Ratio Sensor - Upstream

Brand NTK 24357
Position Upstream
Mounting Bracket Included No
Sensor Type Heated
Thread Diameter 18.000
Thread Length 0.38
Universal Or Specific Fit Specific
Wire Quantity 5
Wiring Harness Length 30.5
Product line Direct Fit 5-Wire A/F Sensor
Fits Mazda · 3 vehicles

Direct fit replacement. Specific fit for straightforward installation.

Heated sensor. Helps deliver faster, more consistent readings.

OE-spec quality. Extensively tested for reliable performance.

Cross-references Davico Mfg 18118, DENSO Auto Parts 234-5013 and L33X188G1C for the same application. See all 3.

$167.01Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
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Step 2 — Quantity
Order total $167.01
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

NTK Direct Fit Air/Fuel Ratio Sensor for Mazda 3

NTK Part Number 24357 is a direct fit heated air/fuel ratio sensor built for precise exhaust feedback on select Mazda 3 applications. It is engineered for the upstream Bank 1 Sensor 1 location on 2007-2009 Mazda 3 models, with OE-style fit, form, and function.

Key Features

  • Direct fit air/fuel ratio sensor for specific vehicle applications
  • Heated sensor design for faster operating temperature and signal response
  • 5-wire configuration for accurate air/fuel monitoring
  • 30.5-inch wiring harness length for proper routing
  • 18.000 mm thread diameter with 0.38 thread length
  • Specific fit design for easier replacement on the correct application
  • NTK Part Number 24357 for catalog and cross-reference lookup

Product Details

NTK is part of the NGK family of products and focuses on oxygen and air/fuel ratio sensor technology for import and domestic vehicles. As a major OE sensor manufacturer, NTK applies ceramic manufacturing expertise and production testing to help deliver consistent signal accuracy and dependable operation. This NTK 24357 sensor is built for the upstream position on 2007-2009 Mazda 3, where it monitors exhaust oxygen content and supports engine management decisions related to fuel delivery and emissions control. This part cross-references DENSO Auto Parts 234-5013 for the same application.

What This Sensor Helps Address

  • Check engine light related to air/fuel ratio sensor performance
  • Rough idle caused by inaccurate upstream exhaust feedback
  • Fuel trim issues from a slow or faulty sensor signal
  • Emissions test failures tied to sensor response problems
  • Reduced drivability from incorrect air/fuel mixture control

Installation Notes and Tips

Fits 2007-2009 Mazda 3, Upstream. Confirm the Bank 1 Sensor 1 location before installation and match the connector and harness routing to the original sensor. The heated 5-wire design and specific-fit configuration are intended for direct replacement on the listed application. Verify thread size and sensor placement against the removed part before final tightening.

Quality Assurance

NTK manufactures oxygen and air/fuel ratio sensors with OE-focused production standards and extensive testing during manufacturing to help ensure quality and reliability that meets or exceeds original equipment specifications. NTK Part Number 24357 is backed by the brand’s sensor specialization and application coverage for import and domestic vehicles.

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2009Mazda32.3LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2008Mazda32.3LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
2007Mazda32.3LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Davico Mfg — 18118DENSO Auto Parts — 234-5013L33X188G1C