* Alternator: If the alternator is not functioning properly, it can cause a high-pitched whine. This is because the alternator is responsible for generating electricity for the car's electrical system, and if it is not working properly, it can cause a voltage fluctuation that can lead to a whining noise.
* Power steering pump: If the power steering pump is low on fluid or is damaged, it can also cause a high-pitched whine. This is because the power steering pump is responsible for providing hydraulic pressure to the power steering system, and if it is not working properly, it can cause a loss of power steering assist and a whining noise.
* Driveline: A high-pitched whine while accelerating can also be caused by a problem with the driveline. This includes the transmission, driveshaft, and differential. If any of these components are damaged or worn out, it can cause a whining noise.
* Turbocharger/supercharger: If your Intrepid is turbocharged or supercharged, a high pitched whine could indicate a problem with the turbocharger or supercharger. This could be caused by a number of issues including a low oil level, a faulty wastegate, or a damaged impeller.
If you hear a high-pitched whine while accelerating in your 2004 Intrepid, it is important to have the car inspected by a qualified mechanic to determine the cause of the noise and have it repaired if necessary.