Selective Catalytic Reduction (SCR) Catalyst — Maruti Suzuki Swift
Category: Exhaust | Severity: high | Cost: ₹30,000–₹80,000
What is Selective Catalytic Reduction (SCR) Catalyst?
Reduces NOx emissions using AdBlue (DEF).
How Selective Catalytic Reduction (SCR) Catalyst Works
Injects DEF into exhaust, converting NOx into nitrogen and water.
Why is Selective Catalytic Reduction (SCR) Catalyst Important?
Essential in diesel engines for BS6 compliance.
Common Problems
- Clogging
- AdBlue crystallization
Symptoms
- Warning light
- Reduced power
- Higher emissions
Causes of Failure
- Low DEF
- Injector issues
Impact on Car Performance
Engine enters limp mode.
DIY Fix Guide — Step by Step
- Refill DEF
- Check injector
Maintenance Tips
- Maintain DEF level
- Use quality DEF
Replacement Cost in India
Estimated range: ₹30,000 – ₹80,000
Where to Buy Online
When to Replace Selective Catalytic Reduction (SCR) Catalyst
When NOx levels are high or system fails.