Glow Plugs — Audi Q7
Category: Engine | Severity: medium | Cost: ₹3,000–₹12,000
What is Glow Plugs?
Glow plugs preheat the combustion chamber in diesel engines for easier starting.
How Glow Plugs Works
They heat up to assist ignition of diesel fuel in cold conditions.
Why is Glow Plugs Important?
Essential for cold starts in diesel engines.
Common Problems
- Plug failure
- Slow heating
Symptoms
- Hard starting
- White smoke
- Rough idle
Causes of Failure
- Wear
- Carbon buildup
Impact on Car Performance
Failure leads to starting issues and poor combustion.
DIY Fix Guide — Step by Step
- Check glow plug indicator
- Scan ECU codes
- Test resistance
- Replace faulty plugs
- Ensure proper voltage
Maintenance Tips
- Replace in sets
- Check during service
Replacement Cost in India
Estimated range: ₹3,000 – ₹12,000
Where to Buy Online
When to Replace Glow Plugs
Replace when starting issues occur.