Knock Sensor for MG Motor Majestor — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹3,000–₹15,000
What is the Knock Sensor?
Detects engine knocking or abnormal combustion.
How the Knock Sensor Works
Sends vibration signals to ECU to adjust ignition timing.
Why the Knock Sensor is Important
Prevents engine damage from knocking.
Common Problems with the Knock Sensor
- Failure
- False signals
Warning Symptoms of a Failing Knock Sensor
- Reduced power
- Check engine light
Common Causes of Knock Sensor 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
Knock Sensor Replacement Cost in India
Expect to pay between ₹3,000 and ₹15,000 for genuine parts plus labour at an authorised MG Motor workshop. Local garages and aftermarket parts can be 20–40% cheaper but may compromise warranty.
Where to Buy Knock Sensor Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade Knock Sensor listings.
When to Replace the Knock Sensor
Replace when knocking persists or sensor fails.