Not everyone is a car buff
What is a car differential? We attempt to explain 10 car-related terms
Published on April 27, 2025
Credit: VANDER FILMS
As long as you aren’t directly involved in it, not being savvy with a certain profession’s lingo is usually not a problem. But alas, exceptions exist, and these situations can create confusion and anxiety for the uninformed party in a conversation. Just like a patient who struggles to understand the complex terms a doctor uses to explain their condition, many people feel unsure when a mechanic explains a problem with their car. Listed below are 10 words and phrases that car buffs and mechanics use frequently. How many of these do you know?
Banger
Credit: Tim Mossholder
In the context of cars, the term "banger" refers to traditional combustion engines. While many people are familiar with engine cylinders, not everyone knows how the term "banger" relates to them.
For example, some refer to four-cylinder engines as "four-bangers" because of the distinct "banging" sound they produce.
A, B, C Pillars
Credit: Alexandr Bormotin
When talking about pillars in a car context, we are referring to the structural divisions between the windows. The A-pillar typically denotes the section on each side of the windshield, the B-pillars are located between the driver and passenger windows, and the C-pillar is positioned toward the rear of the vehicle.
Limited-Slip Differential
Credit: Silvio Linz
A limited-slip differential reduces wheel slip with the least traction, by shifting a portion of the torque to the wheel with the most traction, therefore, improving the performance of a car. This results in better overall traction.
Brake Bias
Credit: Toby Hall
Brake bias refers to how braking power is distributed between the front and rear wheels. Brake bias can either reference the front of the car or the rear, depending on where it’s dispersed. Brake bias is often expressed as a percentage of braking power sent to the front brakes (e.g., 52%).
Camber
Credit: Luca Nicoletti
The camber is an adjustable element of the car’s wheels that sets the tilt angle. Depending on the direction of the tilt, camber is classified as either negative or positive. Each car’s camber setting is adjustable and varies based on the driver’s preference.
How a driver sets their camber affects how quickly the tires wear over time. When in doubt, always check with a specialist.
Bedding brake pads
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Another expression relating to the brakes is the action of "bedding the brake pads." All brake pads require a bedding process to enhance performance, which involves creating a thin transfer film between the pads and the rotor.
Diagnostic check
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A diagnostic check takes place when a mechanic connects a laptop or specialized equipment to a car to detect documented faults. Each fault is assigned a unique code, and by accessing the car's electronic control unit (ECU), the specific number will identify what the problem is.
Most modern mechanics use computers that can connect to a car’s electronic system and read the error log for problems.
Bushings
Credit: Myron Mott
In the automotive world, suspension bushings are small rubber components attached to suspension parts that help absorb shocks and vibrations from the road. Since they are made of rubber, they can deteriorate and wear out over time, requiring periodic replacement.
Spongy brakes
Credit: Hoyoun Lee
The third and final brake-related term on this list, "spongy brakes," is an expression used to describe an instance where the brake pedal offers little resistance when pressed down. This typically indicates a lack of brake fluid, which is fairly cheap to buy and add.
Differential
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A car differential is a set of gears that splits engine torque, allowing the wheels to rotate at different speeds. This is especially important when turning, as the outer wheels must rotate faster than the inner wheels to cover more ground in the same amount of time.
The front differential is located between the two front wheels and distributes the engine’s power to the front wheels. In the same manner, the rear differential is located between the two rear wheels and distributes the engine’s power to the rear wheels.