NOx Sensor for Hyundai Creta — Price, Symptoms & Replacement Guide
Category: Exhaust | Failure Severity: High | Replacement Cost in India: ₹12,000–₹30,000
What is the NOx Sensor?
Measures nitrogen oxide levels in diesel exhaust to ensure emission compliance.
How the NOx Sensor Works
Mounted in exhaust system, it monitors NOx gases and helps ECU adjust SCR system.
Why the NOx Sensor is Important
Critical for BS6 compliance and emission reduction.
Common Problems with the NOx Sensor
- Sensor failure
- AdBlue system faults
- Wiring issues
Warning Symptoms of a Failing NOx Sensor
- Check engine light
- Reduced power
- AdBlue warning
Common Causes of NOx Sensor Failure
- Poor fuel quality
- Sensor aging
Impact on Car Performance
Engine may go into limp mode affecting performance.
DIY Fix Guide — Step by Step
- Professional replacement recommended
Maintenance Tips
- Use correct AdBlue
- Regular servicing
NOx Sensor Replacement Cost in India
Expect to pay between ₹12,000 and ₹30,000 for genuine parts plus labour at an authorised Hyundai workshop. Local garages and aftermarket parts can be 20–40% cheaper but may compromise warranty.
Where to Buy NOx Sensor Online
When to Replace the NOx Sensor
Only when faulty or warning appears.
Frequently Asked Questions about NOx Sensor
- Is NOx sensor in petrol cars?
- No, mostly in diesel engines.
- Why is NOx sensor expensive?
- Due to complex emission control technology.
- Can faulty NOx sensor affect mileage?
- Yes, indirectly.