1. Classify by functional nature

Vulnerable parts: brake pads, bearings, and other worn parts that require regular replacement.

Consumable parts: belts, hoses, and other aging accessories that are used with age.

Basic components: crankshafts, cylinder blocks, and other core components throughout their entire lifespan.

2. Classify by quality

Original parts: with brand logo, circulated through 4S stores, with guaranteed quality.

Genuine parts: Non original but of standard quality, with higher cost-effectiveness.