Brake pads consist of friction material that is bonded to a solid steel backing plate. When you push on the brake pedal, the friction material on the brake pads is forced against the inner and outer surfaces of the steel brake rotor under enormous pressure. The resulting friction causes the wheels on your car to decelerate rapidly allowing for a quick, secure and controlled stop. After thousands of miles, this friction material in time wears away, and the brake rotor wears away as well, needing replacement.

A car battery is an energy storage device that depends on a chemical reaction within the battery to produce electricity. The stored electrical energy is used to start operating the starter motor, ignition system, and fuel system on your vehicle. Once your car engine is going, the alternator supplies the electricity needed for all vehicle systems and charges the battery to supplant the electric energy used when starting a car.

Engine oil is the lifeblood of the engine. The oil dwell in the oil pan, which is under the car attached to the bottom of the engine. All internal parts of the engine need to be greased by the engine oil. Inadequate lubrication will cause the parts to wear out faster and in the end leading the engine failure. An oil filter keeps the oil clean and free of debris. If the filter is not change out on a regular basis, it will get clogged and will not be able to pass oil into the engine.

The radiator performs a particular function, it keeps the engine from overheating. While running, the engine generate heat. Coolant flowing through the system absorbs and removes additional heat from the engine. The coolant then passes through the radiator where it cools off and is later flows back to the engine to absorb heat again.

The starter motor is a strong, compact electric motor that will turn a car’s engine over at about 200 RPM in order to start the engine. The starter is at the station of a circuit that includes the battery, the ignition switch, a neutral safety switch, relays and fuses.

The car's engine cooling system thermostat is a compact valve within a cooling system and a passageway that opens and closes in feedback to the temperature of the circulating engine coolant. When your car is first started and the coolant is cold, the valve in the thermostat will be in the lock position, circulating the coolant flow only within the engine instead of flowing to the radiator, then allows the engine to warm up fast, boosting fuel efficiency, low emissions, and reduced engine deposits.