HomeEmission Control > SensorsGlobal Parts 1811929 Ignition Knock (Detonation) Sensor
Part #: 1811929

Global Parts 1811929 Ignition Knock (Detonation) Sensor

13 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$37.39Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Audi, S4, A6 Quattro, and Allroad Quattro
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Ignition Knock Sensor for Audi A6 Quattro and S4

The Global Parts 1811929 Ignition Knock (Detonation) Sensor is designed to provide accurate knock detection for Audi vehicles including the A6 Quattro, Allroad Quattro, and S4 models. This sensor helps maintain engine performance by detecting engine knock and sending signals to the engine control unit.

  • Wiring harness length: 3.75 inches for precise fitment
  • Blade terminal type with 3 terminals for secure electrical connection
  • Includes wiring harness with one female oblong connector
  • Connector designed for easy installation and reliable contact
  • Mounting hardware not included, allowing use of existing fasteners

Product Details and Specifications

The Global Parts 1811929 ignition knock sensor features a 3.75-inch wiring harness that ensures proper reach and connection within the engine bay of compatible Audi models. It uses a blade terminal type with three terminals, providing a stable and durable electrical interface. The sensor includes a female oblong connector, designed for compatibility with factory wiring harnesses. While mounting hardware is not included, the sensor is engineered to fit securely using existing mounting points on the Audi A6 Quattro, Allroad Quattro, and S4.

Compatible Audi Models and Applications

This ignition knock sensor is compatible with the following Audi vehicles:

  • Audi A6 Quattro
  • Audi Allroad Quattro
  • Audi S4

It is specifically designed to detect engine detonation and send accurate signals to the engine control unit, helping to optimize ignition timing and prevent engine damage.

Common Issues Addressed by the Ignition Knock Sensor

  • Engine knocking or pinging under acceleration
  • Reduced engine performance or hesitation
  • Check engine light triggered by knock sensor fault codes
  • Poor fuel economy due to incorrect ignition timing
  • Potential engine damage from undetected detonation

Installation Notes and Tips

When installing the Global Parts 1811929 sensor, ensure the wiring harness is routed away from high-heat areas to prevent damage. Use the existing mounting hardware from the original sensor for secure attachment. Verify the connector is fully seated and locked to avoid intermittent electrical issues. It is recommended to clear any diagnostic trouble codes after installation and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty Information

Global Parts manufactures this ignition knock sensor to meet OEM specifications for fit and function. The part number 1811929 undergoes quality checks to ensure reliable performance in Audi A6 Quattro, Allroad Quattro, and S4 vehicles. While mounting hardware is not included, the sensor is backed by Global Parts' standard warranty coverage, providing assurance of durability and proper operation under normal use conditions.

This part fits 13 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2009AudiS44.2LV8N/AIgnition Knock Sensor; Blue Connector; 185mm Wire Lead
2008AudiA6 Quattro4.2LV8N/AIgnition Knock Sensor; Blue Connector; w/ 185mm Lead
2008AudiS44.2LV8N/AIgnition Knock Sensor; Blue Connector; 185mm Wire Lead
2007AudiA6 Quattro4.2LV8N/AIgnition Knock Sensor; Blue Connector; w/ 185mm Lead
2007AudiS44.2LV8N/AIgnition Knock Sensor; Blue Connector; 185mm Wire Lead
2006AudiA6 Quattro4.2LV8N/AIgnition Knock Sensor; Blue Connector; w/ 185mm Lead
2006AudiS44.2LV8N/AIgnition Knock Sensor; Blue Connector; 185mm Wire Lead
2005AudiA6 Quattro4.2LV8GASN/AIgnition Knock Sensor; Blue Connector; w/ 185mm Lead
2005AudiAllroad Quattro4.2LV8N/AIgnition Knock Sensor; Cylinders 1-4, 7,8
2005AudiS44.2LV8N/AIgnition Knock Sensor; Blue Connector; 185mm Wire Lead
2004AudiAllroad Quattro4.2LV8N/AIgnition Knock Sensor; Cylinders 1-4, 7,8
2004AudiS44.2LV8N/AIgnition Knock Sensor; Blue Connector; 185mm Wire Lead
2003AudiAllroad Quattro4.2LV8N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.