Common Rail — Audi Q3
Category: Engine | Severity: high | Cost: ₹20,000–₹60,000
What is Common Rail?
Common rail system stores high-pressure fuel for diesel injection.
How Common Rail Works
Supplies pressurized fuel to injectors in diesel engines.
Why is Common Rail Important?
Ensures efficient diesel combustion.
Common Problems
- Pressure leaks
- Contamination
Symptoms
- Hard start
- Black smoke
Causes of Failure
- Dirty diesel
- Wear
Impact on Car Performance
Reduces fuel efficiency and increases emissions.
DIY Fix Guide — Step by Step
- Use clean diesel
- Check fuel system
Maintenance Tips
- Regular fuel filter replacement
Replacement Cost in India
Estimated range: ₹20,000 – ₹60,000
Where to Buy Online
When to Replace Common Rail
Replace when pressure system fails.