Knock Sensor for Maruti Suzuki Swift — Price, Symptoms & Replacement Guide
Category: Fuel System | Failure Severity: High | Replacement Cost in India: ₹3,000–₹9,000
What is the Knock Sensor?
Detects engine knocking or abnormal combustion.
How the Knock Sensor Works
Sends vibration signals to ECU to adjust timing.
Why the Knock Sensor is Important
Prevents engine damage from knocking.
Common Problems with the Knock Sensor
- Sensor failure
- False signals
Warning Symptoms of a Failing Knock Sensor
- Engine knocking
- Reduced power
Common Causes of Knock Sensor Failure
- Heat damage
- Aging
Impact on Car Performance
Engine damage risk.
DIY Fix Guide — Step by Step
- Scan ECU
- Replace sensor
Maintenance Tips
- Use correct fuel octane
Knock Sensor Replacement Cost in India
Expect to pay between ₹3,000 and ₹9,000 for genuine parts plus labour at an authorised Maruti Suzuki 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
When knocking persists.