HomeEmission Control > SensorsBeck Arnley 158-1303 Ignition Knock (Detonation) Sensor
Part #: 158-1303

Beck Arnley 158-1303 Ignition Knock (Detonation) Sensor

22 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Subaru, Baja, Impreza, Legacy, Outback, and Forester
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Reliable Ignition Knock Sensor for Subaru Vehicles

The Beck Arnley 158-1303 Ignition Knock (Detonation) Sensor is designed to monitor engine knocking and ensure optimal performance for Subaru models including Baja, Forester, Impreza, Legacy, and Outback. This sensor plays a critical role in emission control by detecting detonation and helping the engine management system adjust timing accordingly.

Key Features of Beck Arnley 158-1303 Knock Sensor

  • Compatible with Subaru Baja, Forester, Impreza, Legacy, and Outback models
  • Monitors engine knock to prevent detonation damage
  • Supports emission control systems by providing accurate sensor data
  • Contains lead as a chemical component, requiring proper handling
  • OEM-quality fit and function for reliable performance

Detailed Product Description

The Beck Arnley 158-1303 ignition knock sensor is engineered to detect abnormal combustion events, commonly known as engine knock or detonation, in Subaru vehicles. By sensing vibrations caused by knocking, it sends signals to the engine control unit (ECU) to adjust ignition timing and prevent engine damage. This sensor is essential for maintaining efficient engine operation and reducing harmful emissions. The presence of lead as a chemical component in the sensor highlights the importance of careful installation and disposal in accordance with environmental regulations.

Common Applications and Issues Addressed

  • Prevents engine damage caused by knocking or detonation
  • Helps maintain proper ignition timing for Subaru Baja, Forester, Impreza, Legacy, and Outback
  • Supports emission control compliance by providing accurate knock detection
  • Reduces engine noise and vibration related to detonation
  • Improves overall engine performance and fuel efficiency

Installation Notes and Tips

  • Ensure the vehicle is compatible: Subaru Baja, Forester, Impreza, Legacy, or Outback
  • Handle the sensor carefully due to the presence of lead; follow safety guidelines
  • Use proper torque specifications to avoid sensor damage
  • Disconnect the battery before installation to prevent electrical issues
  • Verify sensor wiring and connections for secure fitment

Quality Assurance and Warranty Information

Beck Arnley parts are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. The 158-1303 ignition knock sensor undergoes rigorous quality control testing to provide consistent operation in Subaru vehicles. Warranty coverage details should be confirmed at the time of purchase, as they may vary by distributor or region.

BrandBeck Arnley
Part Number158-1303
Are You Using The Long Form WarningY
Chemical(s) at IssueLEAD

This part fits 22 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2006SubaruBaja2.5LH4N/A
2006SubaruImprezaWRX STI2.5LH4N/A
2006SubaruLegacyGT2.5LH4N/A
2006SubaruLegacyGT spec.B2.5LH4N/A
2006SubaruOutbackXT2.5LH4N/A
2006SubaruOutbackXT Limited2.5LH4N/A
2005SubaruBaja2.5LH4N/A
2005SubaruForesterX2.5LH4N/A
2005SubaruForesterXS2.5LH4N/A
2005SubaruForesterXT2.5LH4N/A
2005SubaruImpreza2.5LH4N/A
2005SubaruLegacyGT2.5LH4N/A
2005SubaruLegacyGT Limited2.5LH4N/A
2005SubaruLegacyi2.5LH4N/A
2005SubaruLegacyLimited2.5LH4N/A
2005SubaruOutbacki2.5LH4N/A
2005SubaruOutbackLimited2.5LH4N/A
2005SubaruOutbackXT2.5LH4N/A
2005SubaruOutbackXT Limited2.5LH4N/A
2004SubaruBaja2.5LH4N/A
2004SubaruForester2.5LH4N/A
2004SubaruImpreza2.5LH4N/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.