Knock Sensor for BMW X5 — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹4,000–₹15,000
What is the Knock Sensor?
Detects engine knocking or detonation.
How the Knock Sensor Works
Sends signals to ECU to adjust ignition timing.
Why the Knock Sensor is Important
Prevents engine damage.
Common Problems with the Knock Sensor
- Sensor failure
Warning Symptoms of a Failing Knock Sensor
- Knocking sound
- Poor performance
Common Causes of Knock Sensor Failure
- Wear
- Electrical issues
Impact on Car Performance
Engine damage risk increases.
DIY Fix Guide — Step by Step
- Scan ECU
- Check wiring
Maintenance Tips
- Use proper fuel
Knock Sensor Replacement Cost in India
Expect to pay between ₹4,000 and ₹15,000 for genuine parts plus labour at an authorised BMW 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 faulty.