White smoke
Slight when cold, it's often condensation. Thick and persistent, it may indicate burnt coolant.
COMMON FAILURES01 02 03
Exhaust smoke
The color of the smoke and when it appears (cold, during acceleration, continuously) are the first useful pieces of information.
Possible causes
Blue smoke
It suggests burnt oil: piston rings, valve stem seals, or turbo.
Black smoke
It often indicates excess fuel: injection, air filter, or sensor to check.
Price benchmarks
| Repair | Observed range |
|---|---|
| Turbocharger | 1500 – 3500 € incl. VAT |
| Head gasket | 800 – 2500 € incl. VAT |
| Injectors | 200 – 600 € incl. VAT |
Prices observed in France, parts and labour included. Method and sources
Questions to ask the garage
- Are oil and coolant levels decreasing?
- Is a compression or leak test planned?
- Which lead was ruled out, and how?
Indicative preliminary diagnosis. Does not replace a vehicle inspection by a professional.
Describe your case
Describe your vehicle and what you observed: the analysis is based on your case.
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