SCR Catalyst for Renault Duster — Price, Symptoms & Replacement Guide
Category: Exhaust | Failure Severity: High | Replacement Cost in India: ₹30,000–₹90,000
What is the SCR Catalyst?
Selective Catalytic Reduction unit reduces NOx emissions using DEF fluid.
How the SCR Catalyst Works
Injects AdBlue into exhaust gases which reacts in catalyst to convert NOx into nitrogen and water.
Why the SCR Catalyst is Important
Essential for meeting BS6 diesel emission standards.
Common Problems with the SCR Catalyst
- Clogging
- Reduced efficiency
Warning Symptoms of a Failing SCR Catalyst
- Warning light
- High emissions
Common Causes of SCR Catalyst Failure
- Poor DEF quality
- Sensor malfunction
Impact on Car Performance
Failure increases NOx emissions and can limit engine performance.
DIY Fix Guide — Step by Step
- Refill DEF
- Check injector
- Scan ECU for errors
Maintenance Tips
- Use genuine AdBlue
- Check DEF level regularly
SCR Catalyst Replacement Cost in India
Expect to pay between ₹30,000 and ₹90,000 for genuine parts plus labour at an authorised Renault workshop. Local garages and aftermarket parts can be 20–40% cheaper but may compromise warranty.
Where to Buy SCR Catalyst Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade SCR Catalyst listings.
When to Replace the SCR Catalyst
When emissions exceed limits or catalyst efficiency drops.