HomeEmission Control > SensorsFacet 9.3257 Ignition Knock (Detonation) Sensor
Part #: 9.3257

Facet 9.3257 Ignition Knock (Detonation) Sensor

⚙️ 73 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Mazda, CX-3, MX-5 Miata, 3, 6, and CX-5
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Reliable Ignition Knock Sensor for Mazda Vehicles

The Facet 9.3257 ignition knock sensor is designed to detect engine detonation and help maintain optimal engine performance. Compatible with various Mazda models, this sensor plays a critical role in emission control and engine management systems.

  • Compatible with Mazda 2, 3, 3 Sport, 6, CX-3, CX-5, and MX-5 Miata
  • Part number 9.3257 ensures precise fit and function
  • Monitors engine knock to prevent detonation damage
  • Supports emission control by providing accurate sensor data
  • Durable construction for consistent performance under varying conditions

Product Details and Functionality

The Facet 9.3257 ignition knock sensor detects vibrations caused by engine knock or detonation. By sending signals to the engine control unit (ECU), it allows the ECU to adjust ignition timing and fuel delivery to prevent engine damage. This sensor is essential for maintaining engine efficiency and reducing harmful emissions in Mazda vehicles such as the Mazda 3 Sport and CX-5. The sensor’s design ensures compatibility with the specific engine configurations found in these models, providing reliable data for optimal engine management.

Common Applications and Problem Resolution

  • Prevents engine knocking and pinging that can cause long-term damage
  • Helps reduce excessive emissions by enabling proper ignition timing
  • Addresses engine performance issues related to detonation
  • Improves fuel efficiency by optimizing combustion
  • Eliminates false knock sensor codes that may trigger check engine lights

Installation Notes and Tips

  • Ensure compatibility with your specific Mazda model before installation
  • Disconnect the battery prior to sensor replacement to avoid electrical issues
  • Use proper torque specifications to avoid sensor damage
  • Inspect wiring and connectors for corrosion or damage during installation
  • Clear any diagnostic trouble codes after installation to reset the ECU

Quality Assurance and Warranty Information

Facet ignition knock sensors are manufactured to meet OEM standards for fit and function. The 9.3257 sensor undergoes rigorous quality control to ensure durability and reliable performance. While specific warranty details may vary, Facet typically offers coverage against manufacturing defects to provide confidence in product longevity and reliability.

This part fits 73 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2021MazdaCX-32.0LL4GASN/AWithout cable
2020MazdaCX-32.0LL4GASN/AWithout cable
2019Mazda3 Sport2.0LL4GASN/AWithout cable
2019Mazda62.5LL4GASN/AWithout cable
2019MazdaCX-32.0LL4GASN/AWithout cable
2019MazdaCX-52.5LL4GASN/AWithout cable
2018Mazda32.5LL4GASN/AWithout cable
2018Mazda3 Sport2.5LL4GASN/AWithout cable
2018Mazda62.5LL4GASN/AWithout cable
2018MazdaCX-32.0LL4GASN/AWithout cable
2018MazdaCX-52.5LL4GASN/AWithout cable
2018MazdaMX-5 Miata2.0LL4GASN/AWithout cable
2017Mazda21.5LL4GASN/AWithout cable
2017Mazda3 Sport2.5LL4GASN/AWithout cable
2017MazdaCX-3TouringN/A
2017MazdaCX-3SportN/A
2017MazdaCX-3Grand TouringN/A
2017MazdaMX-5 MiataSportN/A
2017MazdaMX-5 MiataClubN/A
2017MazdaMX-5 MiataGrand TouringN/A
2016Mazda21.5LL4GASN/AWithout cable
2016Mazda3I Touring2.0LL4N/A
2016Mazda3s TouringN/A
2016Mazda3s Grand TouringN/A
2016Mazda3i Grand TouringN/A
2016Mazda3I SportN/A
2016Mazda3 Sport2.5LL4GASN/AWithout cable
2016Mazda6TouringN/A
2016Mazda6Grand TouringN/A
2016Mazda6SportN/A
2016MazdaCX-3Grand Touring2.0LL4N/A
2016MazdaCX-3TouringN/A
2016MazdaCX-3SportN/A
2016MazdaCX-5Grand TouringN/A
2016MazdaCX-5Sport2.0LL4N/A
2016MazdaCX-5TouringN/A
2016MazdaCX-5Sport2.5LL4N/A
2016MazdaMX-5 MiataGrand TouringN/A
2016MazdaMX-5 MiataClubN/A
2016MazdaMX-5 MiataSportN/A
2015Mazda21.5LL4GASN/AWithout cable
2015Mazda3I Touring2.0LL4N/A
2015Mazda3i Grand TouringN/A
2015Mazda3I SportN/A
2015Mazda3s Grand TouringN/A
2015Mazda3i SVN/A
2015Mazda3s TouringN/A
2015Mazda3 Sport2.5LL4GASN/AWithout cable
2015Mazda6Sport2.5LL4N/A
2015Mazda6Grand Touring2.5LL4N/A
2015Mazda6Touring2.5LL4N/A
2015MazdaCX-5Sport2.0LL4N/A
2015MazdaCX-5Sport2.5LL4N/A
2015MazdaCX-5TouringN/A
2015MazdaCX-5Grand TouringN/A
2014Mazda3I SportN/A
2014Mazda3s TouringN/A
2014Mazda3s Grand TouringN/A
2014Mazda3i SVN/A
2014Mazda3i Grand TouringN/A
2014Mazda3I Touring2.0LL4N/A
2014Mazda3 Sport2.5LL4GASN/AWithout cable
2014Mazda6Sport2.5LL4N/A
2014Mazda6Touring2.5LL4N/A
2014Mazda6Grand Touring2.5LL4N/A
2014MazdaCX-5TouringN/A
2014MazdaCX-5Grand TouringN/A
2014MazdaCX-5SportN/A
2013Mazda3i2.0LL4N/A
2013MazdaCX-5Grand TouringN/A
2013MazdaCX-5TouringN/A
2013MazdaCX-5SportN/A
2012Mazda3i2.0LL4N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.