VDO Gauges 13-62-7-566-785 Knock Sensor for BMW Engines - N51/N52

The VDO Gauges 13-62-7-566-785 is an OEM-quality knock sensor designed specifically for BMW N51 SULEV and N52 6-cylinder engines. This critical engine management component monitors engine vibrations to detect and prevent detonation, protecting your engine from damage while optimizing performance and fuel efficiency.

Key Features:

• Direct OEM replacement for BMW part number 13-62-7-566-785
• Piezoelectric sensor technology for accurate knock detection
• Mounts to engine block below the intake manifold
• Enables cylinder-selective ignition timing adjustments
• Compatible with N51 and N52 straight-six engines (2006-2013 BMW vehicles)
• Supersedes BMW part number 13-62-7-525-039

Function and Benefits:

Knock sensors play a vital role in modern engine management systems by detecting abnormal combustion (engine knock or detonation). When knock is detected, the engine control unit (DME) retards ignition timing on the affected cylinder to prevent engine damage. This allows the engine to operate at optimal timing for maximum power and efficiency while protecting against detonation under varying conditions and fuel quality.

Installation Notes:

The knock sensor requires one aluminum mounting bolt (BMW part number 11-41-7-529-984, sold separately). BMW N52 engines use magnesium engine blocks that require aluminum bolts exclusively to prevent electrochemical corrosion. Steel bolts must never be used. BMW recommends replacing knock sensors in pairs and clearing fault codes after installation.

Application:

This sensor is designed for BMW vehicles equipped with N51 SULEV or N52 naturally aspirated 6-cylinder engines, typically found in 2006-2013 model year 1 Series, 3 Series, 5 Series, X3, X5, and Z4 vehicles.