Bosch 0261231226 Ignition Knock (Detonation) Sensor

Bosch Knock Sensor for Hyundai and Kia

This Bosch ignition knock sensor is built for OE-style engine monitoring on select Hyundai Accent and Kia Rio applications. It helps the engine control system detect detonation so timing can be adjusted for smoother operation and improved fuel efficiency.

Key Features

• Bosch OE quality ignition knock (detonation) sensor
• Part number 0261231226 for direct reference
• Blade terminal design with 2 terminals
• Rectangular male connector with 1 connector
• Bolt-on mounting style for secure installation
• Wiring harness included with 236 length
• Metal and plastic construction

Product Details

Bosch 0261231226 is an ignition knock sensor used to monitor engine vibration and signal detonation events to the vehicle’s engine management system. Bosch identifies this OE-quality sensor line as a solution for protecting the engine from knock while supporting fuel consumption reduction of up to 9% when the system is operating as intended. This part cross-references 3925026900 for the same application. It is a direct-fit style sensor for 2006-2011 Hyundai Accent, 2006-2011 Kia Rio, and 2006-2011 Kia Rio5 applications.

What It Helps Address

• Knock or pinging under load
• Check engine light related to knock sensor faults
• Retarded ignition timing caused by false or missing knock signals
• Reduced engine response from detonation control issues
• Fuel economy loss tied to incorrect engine timing adjustments

Installation Notes

Verify connector shape, terminal type, and mounting style before installation. This sensor uses a bolt-on design with a rectangular male connector and included wiring harness, so the existing harness routing and mounting point should be checked against the original part. Confirm vehicle application by year and model before replacing the sensor on Hyundai Accent, Kia Rio, or Kia Rio5 vehicles.

Quality Assurance

Bosch is known for OE-level engine management components, and this knock sensor follows that standard with application-specific fitment and sensor construction intended for consistent signal delivery.