GPD 1811938 Ignition Knock Detonation Sensor

The GPD 1811938 is a direct-fit replacement ignition knock sensor, also known as a detonation sensor, engineered to meet or exceed original equipment (OE) fit, form, and function. GPD (Global Parts Distributors) is a trusted supplier of premium-quality automotive components, delivering professional-grade parts at accessible price points.

What It Does:

The knock sensor monitors the engine for abnormal vibrations caused by pre-ignition or detonation — commonly referred to as engine knock or ping. It mounts directly to the engine block, cylinder head, or intake manifold and sends a signal to the engine control module (ECM), which adjusts ignition timing to eliminate damaging knock events and protect engine integrity.

Key Features:

• Direct-fit replacement — designed to install in the same location as the original sensor with no modification required
• Meets or exceeds OE specifications — engineered to match the original sensor's performance and signal output
• 100% tested for durability and performance prior to leaving the factory
• Premium materials — built to withstand the high-heat, high-vibration environment of the engine bay
• Professional quality — suitable for both DIY installers and professional technicians
• One-year warranty against defects in material and workmanship

A failing knock sensor can trigger a check engine light (CEL), reduce fuel economy, cause sluggish acceleration, and leave the engine vulnerable to detonation damage. Replacing a worn or faulty sensor with the GPD 1811938 restores proper ignition timing control and helps maintain engine performance and longevity.