Knock Sensor — MG Motor Majestor
Category: Engine | Severity: medium | Cost: ₹3,000–₹15,000
What is Knock Sensor?
Detects engine knocking or abnormal combustion.
How Knock Sensor Works
Sends vibration signals to ECU to adjust ignition timing.
Why is Knock Sensor Important?
Prevents engine damage from knocking.
Common Problems
- Failure
- False signals
Symptoms
- Reduced power
- Check engine light
Causes of Failure
- Heat
- Sensor wear
Impact on Car Performance
Engine efficiency drops and damage risk increases.
DIY Fix Guide — Step by Step
- Scan codes
- Inspect sensor
- Replace if needed
Maintenance Tips
- Use proper fuel quality
Replacement Cost in India
Estimated range: ₹3,000 – ₹15,000
Where to Buy Online
When to Replace Knock Sensor
Replace when knocking persists or sensor fails.