GM GENUINE PARTS Ignition Knock Sensor 12623095 - OE Replacement, Made in Japan, Optimizes Timing

The GM Genuine Parts 12623095 Ignition Knock (Detonation) Sensor detects engine knock and sends precise vibration signals so the engine control module can optimize ignition timing.

This GM-recommended ignition knock sensor is an original-equipment replacement engineered to match the fit, function, and durability expected for compatible GM vehicles. Designed and manufactured to GM OE specifications in Japan, the sensor converts combustion-caused vibrations into an electrical signal the vehicle’s computer uses to reduce pinging and protect engine efficiency. Installing a correctly matched knock sensor helps maintain consistent ignition timing and supports smooth running under varying loads and fuel conditions.

How does this knock sensor help my engine perform better?

The sensor monitors subtle vibrations from erratic combustion and generates a voltage pulse proportional to those vibrations. The engine control module reads this signal and retards or advances ignition timing as needed to reduce knock, allowing your engine to run closer to optimal settings without risking damage from detonation.

• Provides real-time vibration data for ignition timing corrections
• Helps prevent prolonged detonation that can harm pistons and bearings
• Supports stable performance across different fuel qualities and loads

Will this GM part fit my vehicle and match original performance?

Yes — the 12623095 sensor is manufactured to meet GM original equipment specifications for fit, form, and function. It is a GM-recommended replacement intended to match the factory-installed component’s electrical characteristics and mounting dimensions, so installation is straightforward when it’s the correct part number for your application.

• Engineered to GM OE tolerances for reliable fitment
• Compatible electrical output for the vehicle control module
• Replaces original equipment without requiring wiring modifications

What are the manufacturing and quality details I should know?

This GM Genuine Parts sensor is produced to GM quality standards and originates from Japan, reflecting controlled manufacturing and testing processes. The part undergoes validation against GM requirements to ensure consistent signal response, durability under engine heat cycles, and long-term corrosion resistance at the mounting interface.

• Made to GM OE specification for performance and longevity
• Manufactured in Japan under controlled quality processes
• Designed to tolerate typical under-hood temperatures and contaminants

How do I recognize when a knock sensor needs replacement?

Faulty knock sensors often trigger a diagnostic trouble code, cause reduced engine performance, or lead to irregular ignition timing. Symptoms may include persistent check-engine lights, reduced fuel economy, or engine pinging that doesn’t subside under load.

• Check-engine light with knock-related fault codes
• Noticeable pinging or knocking during acceleration or heavy loads
• Reduced power or fuel efficiency linked to timing changes

Who is this for: The GM Genuine Parts 12623095 Ignition Knock (Detonation) Sensor is aimed at owners, technicians, and fleet managers who need a direct OE-style replacement for compatible GM vehicles. Choose this part if you require a sensor built to GM specifications, prefer factory-recommended components, or are restoring correct engine controls and timing behavior after a diagnosis indicated knock-sensor faults.

• Features: GM-recommended replacement for factory component
• Quality: Built to GM OE specification for fit, form, and function
• Origin: Country of Origin: Japan