What are the major systems of a car?

[JulianaLee]

A car consists of five major systems: the fuel supply system, the lubrication system, the cooling system, the ignition system, and the starting system. Car fuel: The fuel of a car is the combustible mixture formed by the combination of gasoline and air. The fuel supply system includes the fuel tank, fuel pump, gasoline filter, fuel injector, air filter, and intake manifold. Lubrication system: The lubrication system ensures the normal circulation of engine oil within the engine. The lubrication system includes the oil pump, oil filter, and oil passages. Ignition system: The ignition system is responsible for igniting the combustible mixture inside the engine. The ignition system includes spark plugs and high-voltage coils. Starting system: The starting system is used to start the engine and includes the battery and starter motor. Cooling system: The cooling system is responsible for removing excess heat from the engine. The cooling system includes the radiator, water pump, fan, and thermostat.

[MacSteven]

When I first became an apprentice at the auto repair shop, my master taught me this: the structure of a car is mainly divided into five major parts. The most crucial is the powertrain system, including the engine and transmission—the heart components. The chassis system is responsible for transferring power to the road, encompassing the suspension, steering, and braking. The body system is like our mobile house, managing everything from the frame to the doors and windows. The electrical system is now incredibly complex, ranging from small components like lights and wipers to large ones like touchscreen infotainment systems. And the safety system is indispensable, from seat belts and airbags to electronic stability programs—all vital for survival. These systems are like human organs; without any one of them, the car won’t run.

[WalterAnn]

As a veteran taxi driver with over 20 years of experience, I believe a car is like building blocks divided into four parts: the engine and transmission are the source of power; the chassis with four wheels handles movement; the body shell and frame make up the car's body; and the electrical wiring is like the nervous system. Modern cars also require mentioning active safety systems, such as radar, cameras, and collision avoidance systems—these things didn't exist a decade ago. In fact, when you start the ignition, these systems begin working together, with the fuel system, power supply, and cooling system all operating behind the scenes.

[Dante]

Friends who are into car modifications are well aware of the five major systems: the powertrain driven by the internal combustion engine, chassis tuning that affects handling, the body frame which relates to passive safety, the electronic circuitry that controls the car's brain, and active safety features which are now a must-have. Modifying the suspension and chassis system, flashing the ECU to alter the powertrain, installing a digital dashboard to upgrade the electrical system—each modification project actually involves tinkering with different systems.

[DelAnastasia]

Professional automotive magazines often mention the five major modules: the fuel and cooling systems that power the vehicle, the drivetrain, suspension, and braking systems that enable movement, the body panels that form the cabin, the ignition and lighting systems that manage electrical distribution, and the proactive warning systems for prevention. Now, with new energy vehicles, specialized battery management systems have joined the mix, truly redefining traditional automotive architecture.