| System Categories |
| 1. Engine System |
Cylinder head, piston, connecting rod, crankshaft, camshaft, valves, valve springs, valve guides, cylinder head gasket, oil pan, oil pump, oil filter, fuel filter, fuel injectors, throttle body, intake manifold, exhaust manifold, turbocharger (if applicable), timing chain/belt, flywheel, starter, alternator, engine mounts, water temperature sensor, oil pressure sensor, crankshaft position sensor, air flow meter, etc. |
| 2. Brake System |
Brake discs, brake drums, brake pads, brake shoes, brake calipers, master cylinder, slave cylinders, brake hoses, brake booster (vacuum booster), ABS pump (anti-lock braking system), parking brake cable/electronic parking brake module, brake fluid reservoir, brake pedal, etc. |
| 3. Drivetrain |
Clutch plate, clutch pressure plate, clutch master cylinder/slave cylinder, transmission (manual/automatic), drive shaft (front/rear), universal joints (croClutch plate, clutch pressure plate, clutch master cylinder/slave cylinder, transmission (manual/automatic), drive shaft (front/rear), universal joints (cross shaft/constant vel ocity joint), final drive, differential, differential gears, axle shafts, power take-off (PTO, select models), transfer case (four-wheel drive models), etc.ss shaft/constant velocity joint), final drive, differential, differential gears, axle shafts, power take-off (PTO, select models), transfer case (four-wheel drive models), etc. |
| 4. Drivetrain |
Drive axle (front/rear), axle housing, wheel hubs, tires, rims, inter-wheel differential lock (if applicable), inter-axle differential lock (four-wheel drive models), suspension springs (leaf springs/air springs), shock absorbers, thrust rods, stabilizer bars, drive shaft boots, etc. |
| 5. Steering |
Steering wheel, steering column, steering gear (rack and pinion/recirculating ball), steering rod, steering knuckle, tie rods, trailing rods, power steering pump (hydraulic/electric), steering fluid reservoir, ball studs, steering universal joints, etc. |
| 6. Electrical and Electronic Systems |
Battery, starter, alternator, ignition coil, spark plugs, onboard computer (ECU), sensors (such as water temperature sensor, oil pressure sensor, tire pressure sensor, ABS sensor, etc.), relays, fuse box, wiring harness, instrument panel, central control display, speaker, wiper motor/wiper blades, air conditioning compressor, condenser, evaporator, blower, etc. |
| 7. Body Systems |
Cab (including doors, windows, seats, interior panels), cargo compartment (tailgate/box/railing), frame (beam), bumpers (front/rear), fenders, mudguards, wiper arms, headlight housings, door locks, hinges, handles, body weatherstripping, chassis armor (protective layer), tow hook (trailer hook), footrests, access ladder, etc. |
