The Walker Products Ignition Knock (Detonation) Sensor (part number 242-1162) is a direct-fit replacement for 2004-2009 Audi vehicles with 4.2L engines. Walker Products Knock Sensors are OE Replacement components that detect engine detonation to help the ECU adjust timing and prevent internal engine damage.
Features:
- Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
- Detects Engine Knock:Â Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
- Restores Ignition Timing Accuracy:Â Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
Specifications:
| Number of Terminals | 3 |
| Connector Type | Blade |
| Connector Shape | Oblong |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 2004-2009 Audi models including A6 Quattro, Allroad Quattro, and S4 — 4.2L engines.
Confirm the year, make, model, and engine against your vehicle before ordering. Full application data is shown in the fitment lookup on this page.
Fitment Notes: Color-Blue
Interchanges With: Audi 079905377C, Audi 079905377G, VEMO V10-72-1185, NTK ID0242, Facet 9.3179, FAE 60173, Standard Import 70017, Lucas Electrical SEB1761 and 6 more
WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm.
