Knock Sensor — Audi Q3 Sportback
Category: Engine | Severity: medium | Cost: ₹3,000–₹12,000
What is Knock Sensor?
Detects engine knocking or detonation.
How Knock Sensor Works
Sends vibration signals to ECU for ignition timing adjustment.
Why is Knock Sensor Important?
Prevents engine damage from knocking.
Common Problems
- Sensor failure
Symptoms
- Engine knocking
- Reduced power
Causes of Failure
- Wear
- Electrical issues
Impact on Car Performance
Increases risk of engine damage.
DIY Fix Guide — Step by Step
- Scan ECU codes
- Check sensor wiring
- Inspect mounting
- Replace faulty sensor
- Test engine performance
Maintenance Tips
- Use high-quality fuel
Replacement Cost in India
Estimated range: ₹3,000 – ₹12,000
Where to Buy Online
When to Replace Knock Sensor
Replace when knocking persists or sensor fails.