Spark Plugs — Audi Q7
Category: Engine | Severity: medium | Cost: ₹2,000–₹8,000
What is Spark Plugs?
Spark plugs ignite the air-fuel mixture in petrol engines to start combustion.
How Spark Plugs Works
They generate an electric spark at the right time to ignite compressed fuel-air mixture.
Why is Spark Plugs Important?
Essential for engine starting and smooth combustion in petrol engines.
Common Problems
- Fouling
- Wear
- Carbon deposits
Symptoms
- Engine misfire
- Poor mileage
- Hard starting
Causes of Failure
- Worn electrodes
- Poor fuel quality
- Carbon buildup
Impact on Car Performance
Faulty spark plugs reduce power and efficiency.
DIY Fix Guide — Step by Step
- Inspect spark plug condition
- Clean minor deposits
- Check gap setting
- Replace worn plugs
- Use recommended type
Maintenance Tips
- Replace every 30,000–60,000 km
- Use OEM grade plugs
Replacement Cost in India
Estimated range: ₹2,000 – ₹8,000
Where to Buy Online
When to Replace Spark Plugs
Replace based on service interval or when misfire occurs.