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A Practical Auto Parts Classification List
Based on the auto repair shop's disassembly logic, we avoid textbook categorization and focus directly on core replaceable parts:
I. Powertrain (hardcore components within the engine compartment)
▸ Engine assembly
Cylinder block/cylinder head (primarily aluminum alloy die-cast)
Crankshaft/connecting rod (forged steel, pressure-bearing components)
Piston rings (critical for preventing oil burning)
▸ Respiratory system
Throttle body (carbon deposit-prone area, requires regular cleaning)
Turbocharger (high-wear component for German cars)
Intercooler (prone to deformation and air leakage during collisions)
▸ Lubrication and cooling
Oil pump (oil pressure alarm is a precursor to burning)
Water pump (water leakage directly causes cylinder damage)
Radiator (blockage by catkins leads to high temperatures)
II. Transmission (critical components under the chassis)
▸ Power transmission
Clutch three-piece set (manual transmission consumables)
Transmission valve body (ZF 8AT repair costs over 10,000 yuan)
Drive shaft (source of oil leaks and noise from the CVJ)
▸Suspension control
Shock absorbers (oil leaks must be replaced, affecting handling)
Control arm rubber bushings (caused by noise on bad roads)
Steering rod (deformation causes tire wear)
▸Brake safety
Brake rotors (replacement interval depends on groove depth)
ABS sensor (prone to failure after wading through water)
Vacuum booster pump (brakes become stiff when it fails)
III. Electrical nervous system (the real culprit behind the fault light)
▸Power supply module
Battery (three low charges are essentially unacceptable)
Alternator (noise from bearings is a sign of failure)
Fuse box (check for blown fuses when modifying circuits)
▸Control center
ECU board (highly vulnerable to flooding of cars)
Wiring harness assembly (highly vulnerable to rats and mice)
▸Lighting signal
Headlight assembly (aftermarket parts are prone to fogging and yellowing)
Combination switch Turn signal failure (common problem)
IV. Body skeletal system (key points for accident vehicle identification)
▸ Structural frame
Longitudinal/crossbeam (cut parts = irrefutable evidence of an accident vehicle)
ABC pillar reinforcements (hot-formed steel is a lifesaver)
▸ Coverings
Four doors and two hoods (aluminum hood sheet metal is difficult to repair)
Fenders (highly prone to minor scratches)
▸ Sealing system
Sunroof rails (blockage causes water leakage into the interior)
Door frame seals (aging increases wind noise)
V. Cabin comfort system (directly impacts user experience)
▸ Air conditioning system
Compressor (abnormal noise and cooling difference, replace immediately)
Evaporator (fluorine leakage requires center console removal)
▸ Interior features
Window lifts (wire breakage and seizure)
Seat rails (deformation causes adjustment failure)
▸NVH control
Sound insulation (must be replaced if it becomes smelly after being soaked in water)
Engine mounts (aging causes idling vibration)
