GM Genuine Parts 213-3521 (12589867) Ignition Knock (Detonation) Sensor

Price: $57.78
(as of Nov 13,2025 11:23:00 UTC – Details)

Features:

• Sends signals to the engine control module (ECM) to adjust timing
• Helps prevent damage to the engine caused by pre-ignition
• GM-recommended replacement part for your GM vehicle’s original factory component
• Offering the quality, reliability, and durability of GM OE
• Manufactured to GM OE specification for fit, form, and function

Pros:

• Monitors engine for pinging or spark knock
• Creates voltage signal based on vibrations caused by air/fuel mixture combustion
• Adjusts ignition timing and air/fuel mixture based on signals
• Fits your GM vehicle perfectly
• Provides same performance, durability, and service life as original components

Cons:

• May be more expensive than aftermarket knock sensors
• Installation may require professional help
• Compatibility limited to GM vehicles only
• May not be necessary for all vehicles depending on engine performance