The turbocharger cannot be repaired and is replaced as a complete unit.
1. With the turbocharger removed, inspect the turbocharger housing for cracks or other damage.
2. Turn the turbine at maximum speed and check that the turbine rotates evenly. Check the condition of the turbine blades and compressor wheel.
3. If the exhaust passages are dirty with oil, the turbocharger shaft oil seal may have failed.