* The power steering pump. If the power steering pump is low on fluid, or if the fluid is old and dirty, it can cause a whining noise. Check the power steering fluid level and condition, and add or replace fluid as needed.
* The alternator. The alternator is responsible for charging the battery and powering the electrical system. If the alternator is failing, it can cause a whining noise. Have the alternator tested by a qualified mechanic.
* The turbocharger. The turbocharger is responsible for boosting the engine's power. If the turbocharger is damaged or leaking, it can cause a whining noise. Have the turbocharger inspected by a qualified mechanic.
* The transmission. If the transmission is low on fluid, or if the fluid is old and dirty, it can cause a whining noise. Check the transmission fluid level and condition, and add or replace fluid as needed.
If you are unable to identify the source of the whining noise, it is best to have your car inspected by a qualified mechanic.
