NOx Sensor for Maruti Suzuki Swift — Price, Symptoms & Replacement Guide
Category: Exhaust | Failure Severity: High | Replacement Cost in India: ₹15,000–₹40,000
What is the NOx Sensor?
Measures nitrogen oxide (NOx) emissions in diesel exhaust systems.
How the NOx Sensor Works
Continuously monitors NOx levels and sends data to ECU for emission control adjustments.
Why the NOx Sensor is Important
Critical for BS6 compliance and emission reduction.
Common Problems with the NOx Sensor
- Sensor failure
- Incorrect NOx readings
Warning Symptoms of a Failing NOx Sensor
- Check engine light
- Reduced engine power
- High emissions
Common Causes of NOx Sensor Failure
- Sensor contamination
- AdBlue system issues
- High exhaust temperatures
Impact on Car Performance
Engine may enter limp mode and fail emission norms.
DIY Fix Guide — Step by Step
- Scan ECU codes
- Check AdBlue system
- Replace sensor if faulty
Maintenance Tips
- Maintain AdBlue levels
- Regular diagnostics check
NOx Sensor Replacement Cost in India
Expect to pay between ₹15,000 and ₹40,000 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 NOx Sensor Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade NOx Sensor listings.
When to Replace the NOx Sensor
When emission errors persist or ECU flags failure.