VNE 4009886 Ignition Knock (Detonation) Sensor

Mercedes-Benz Knock Sensor Replacement

Restore accurate engine knock detection with this VNE ignition knock sensor, part number 4009886. It is a direct-fit emission control sensor for a wide range of Mercedes-Benz models, including C63 AMG, E350, ML350, S550, and more.

Use this sensor when you need reliable detonation monitoring for Mercedes-Benz C300, GL550, or SLK350 applications. Part number 4009886 also cross-references Mercedes-Benz OE numbers 004 153 90 28 and A 004 153 90 28 for the same application.

Key Features

• VNE ignition knock (detonation) sensor for emission control systems
• Fits 2005-2015 Mercedes-Benz applications across sedans, coupes, SUVs, and roadsters
• Supports engine knock detection for proper ignition timing control
• OE-style replacement for Mercedes-Benz vehicles with the listed fitments
• Part number 4009886 for easy identification and ordering

Detailed Description

This VNE knock sensor is used in Mercedes-Benz engine management systems to detect abnormal combustion events and send the signal needed for timing correction. Accurate knock sensing is important for drivability, fuel control, and protecting the engine under load. Compatible vehicle coverage includes 2006-2011 Mercedes-Benz E350, 2007-2011 Mercedes-Benz S550, 2008-2012 Mercedes-Benz GL550, and 2008-2015 Mercedes-Benz C63 AMG, along with many other listed models.

Part number 4009886 is a practical replacement choice when servicing Mercedes-Benz ignition knock sensor faults on vehicles such as the C250, GLK350, CLS550, and SL63 AMG. The fitment list spans 2005-2015 Mercedes-Benz models, making it a useful reference for technicians and owners working from OE part numbers or diagnostic trouble codes tied to knock sensor performance.

What It Helps Address

• Knock sensor fault codes
• Erratic ignition timing from inaccurate detonation feedback
• Engine pinging or spark knock under load
• Reduced performance caused by failed knock detection
• Check engine light concerns related to the knock sensor circuit

Installation Notes and Tips

Verify the OE number and engine application before installation. Inspect the sensor connector, wiring, and mounting surface for damage or corrosion before replacing the part. Clear diagnostic trouble codes after installation and confirm proper operation with a scan tool.

Quality Assurance

VNE replacement sensor built for the listed Mercedes-Benz applications. Confirm fitment by matching your vehicle year, model, and OE reference before ordering.