GPD 1811951 Ignition Knock Detonation Sensor

The GPD 1811951 is a direct-fit ignition knock sensor (also known as a detonation sensor) designed to restore proper engine management function. GPD (Global Parts Distributors) engineers this sensor to meet or exceed original equipment (OE) fit, form, and function standards, making it a reliable replacement for a failed or degraded factory knock sensor.

The knock sensor is typically mounted on the engine block, cylinder head, or intake manifold. It continuously monitors engine vibrations and detects the abnormal frequencies associated with pre-ignition or engine knock (detonation). When knock is detected, the sensor sends a signal to the engine control module (ECM), which adjusts ignition timing to protect the engine and maintain optimal performance and fuel efficiency.

Key Features:

• Direct-fit replacement — engineered for precise OE-style installation with no modification required
• Meets or exceeds OE specifications — designed to match the original sensor's sensitivity and output characteristics
• 100% tested for durability and performance before leaving the factory
• Premium materials for long service life under demanding underhood conditions
• Restores proper ignition timing control — helps prevent engine knock, detonation, and associated engine damage
• Backed by GPD's 12-month warranty against defects in materials and workmanship

Replacing a faulty knock sensor with the GPD 1811951 helps eliminate symptoms such as reduced engine power, poor fuel economy, rough idle, and a check engine light triggered by knock sensor fault codes (P0325–P0332). Sold individually.