GPD 1811974 Ignition Knock Detonation Sensor

The GPD 1811974 is a direct-fit ignition knock sensor (also known as a detonation sensor) engineered as a reliable aftermarket replacement for failed or faulty OEM units. GPD (Global Parts Distributors) is a national distributor of aftermarket automotive engine management and HVAC parts, with a reputation for quality components at competitive prices.

How It Works:

The knock sensor mounts to the engine block, cylinder head, or intake manifold and continuously monitors engine vibration. When it detects the abnormal vibrations associated with pre-ignition or engine knock (detonation), it sends a signal to the ECU, which adjusts ignition timing to protect the engine from damage.

Key Features:

• Designed to meet or exceed OE fit, form, and function
• 100% tested for durability and reliable performance
• Direct-fit replacement — no modification required
• Professional-grade construction for long service life
• Backed by GPD's 12-month warranty against defects in materials and workmanship

Replacing a faulty knock sensor restores proper ignition timing control, helping to prevent engine damage, improve fuel economy, and eliminate knock-related trouble codes (DTC P0325–P0332 range).