Turbocharger GT1752S – Symptoms of Failure
Vehicle: Saab 9-5 2.0 / 2.3 (150 kW / 204 HP, 170 kW / 231 HP)
Turbo model: GT1752S
The GT1752S turbocharger used in the Saab 9-5 2.0T and 2.3T engines can wear out over time due to high temperatures, oil contamination, or high mileage. Below are the most common symptoms of turbocharger failure:
1. Loss of Power
- Reduced acceleration
- Poor engine performance under load
- Weak boost pressure
2. Excessive Smoke from Exhaust
- Blue smoke – burning engine oil (damaged turbo seals)
- Black smoke – incorrect air-fuel mixture due to improper boost
- White smoke – possible oil leakage into exhaust system
3. Whistling or Grinding Noise
- Loud whining (“siren” sound) during acceleration
- Metallic grinding noise (possible damaged turbine shaft or bearings)
4. Increased Oil Consumption
- Frequent need to top up engine oil
- Oil traces in intercooler pipes
5. Oil Leaks Around Turbocharger
- Visible oil around compressor or turbine housing
- Oil inside intake system
6. Check Engine Light
- Engine fault codes related to boost pressure
- Limp mode activation
7. Boost Pressure Problems
- Overboost or underboost issues
- Irregular boost response
What Causes Turbo Failure?
- Poor oil quality or infrequent oil changes
- Oil supply blockage
- Foreign object damage
- High mileage wear
- Aggressive driving without proper warm-up and cool-down
Recommendation
If you notice any of the above symptoms in your Saab 9-5, immediate inspection of the turbocharger and oil system is recommended. Continued driving with a faulty turbo can cause serious engine damage.
