Engine Knock Detection Sensor (OEM-Grade Replacement) ?

This sensor is a key safety device for modern Nissan/Infiniti engines. It is needed to “listen” for abnormal combustion (pinging/knock) that can happen from low-octane fuel, high load, carbon buildup, overheating, or incorrect ignition timing. By catching knock early, it helps protect pistons, rings, bearings, and the cylinder head.

How It Works ⚙️

Inside the unit is a piezoelectric element that converts engine block vibrations into a voltage signal. The ECU reads this signal and, when knock is detected, it quickly adjusts ignition timing (and sometimes fueling) to stop the damaging detonation. In simple terms: the sensor “hears” trouble, the ECU “calms” the combustion.

What Happens If It’s Broken ❗

• Check Engine Light and stored knock sensor fault codes
• Slower acceleration, reduced power, and poor throttle response
• Higher fuel consumption due to ECU running safer (retarded timing)
• Harder starts or rough driving under load
• If the ECU can’t react correctly: risk of real engine knock and internal damage

Why Replace It Now ✅

A healthy knock sensor keeps performance smooth, fuel economy stable, and the engine protected during heavy acceleration, hot weather, towing, or long highway runs. It’s a small part with a big role in preventing expensive repairs.

Compatibility ?

• 370Z
• X-Trail
• Skyline
• Teana
• Atlas
• Q70/M
• Rogue
• Skyline Crossover
• Firelady Z
• Fuga
• Murano
• Nv350 Urvan
• Caravan
• Urvan
• Cima
• Q60/G Coupe
• Q60/G Convertible
• Q70
• Q50
• Fuga Hybrid
• Nv350 Caravan
• Q40/G Sedan
• Skyline Coupe
• Elgrand
• Quest
• Maxima
• Pathfinder
• Q70/M Hybrid
• Murano Crosscab