Knock Sensor for Bentley Flying Spur — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹5,000–₹20,000
What is the Knock Sensor?
Detects engine knocking or detonation.
How the Knock Sensor Works
Sends vibration signals to ECU to adjust ignition timing.
Why the Knock Sensor is Important
Prevents engine damage due to knocking.
Common Problems with the Knock Sensor
- Sensor failure
- False readings
Warning Symptoms of a Failing Knock Sensor
- Engine knocking
- Reduced power
- Check engine light
Common Causes of Knock Sensor Failure
- Electrical issues
- Sensor aging
Impact on Car Performance
Can lead to engine damage if not corrected.
DIY Fix Guide — Step by Step
- Scan ECU codes
- Check wiring
- Replace faulty sensor
- Use premium fuel
- Reset ECU
Maintenance Tips
- Use high-quality fuel
- Regular diagnostics
Knock Sensor Replacement Cost in India
Expect to pay between ₹5,000 and ₹20,000 for genuine parts plus labour at an authorised Bentley 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.