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The turbocharger cartridge, also known as the center housing rotating assembly (CHRA), houses the turbine and compressor wheels along with their shafts. It allows these components to rotate at high speeds within the turbocharger housing.

Signs include excessive exhaust smoke, unusual noises from the turbocharger, and noticeable loss of engine power.

In some cases, replacing the cartridge can be a cost-effective solution if the rest of the turbocharger components are in good condition. However, it's essential to consult with a professional mechanic to determine the best course of action.

Maintaining the cartridge involves ensuring proper lubrication by using high-quality oil and adhering to recommended oil change intervals to prevent premature wear.