Car Parts That Start With The Letter O

16 Car Parts That Start With The Letter O

Have you ever wondered what car parts start with H? Wonder no more, you have come to the right place.

In this article, I will explore 16 different car parts that start with O, providing you with detailed information on their function and importance.

So, without any further delay, let’s explore the world of car parts that start with O!


Car Parts That Start With The Letter O

Below are some car parts starting with the letter O (In alphabetical order):

1. Odometer

The odometer is a device that measures the distance a vehicle has traveled. It’s a critical component in determining the vehicle’s maintenance schedule and overall value. The odometer is usually located on the dashboard and is often combined with the speedometer.

2. Oil Cooler

The oil cooler is responsible for keeping the engine oil cool, preventing it from overheating and breaking down. It works by passing the oil through a heat exchanger, where it is cooled by the surrounding air or liquid.

3. Oil Filter

The oil filter is a crucial component of the engine’s lubrication system. It’s responsible for removing contaminants from the engine oil, ensuring that it stays clean and free from debris that could damage the engine.

4. Oil Gasket

The oil gasket is a seal that prevents oil from leaking out of the engine. It’s located between the engine block and the oil pan and is designed to withstand the high pressure and temperature of the engine.

5. Oil Level Sensor

The oil level sensor is a device that measures the level of oil in the engine. It sends a signal to the car’s computer system, which can then alert the driver if the oil level is too low.

6. Oil Pan

The oil pan is a container that holds the engine oil. It’s located at the bottom of the engine and is designed to allow for easy draining and filling of the oil.

7. Oil Pressure Gauge

The oil pressure gauge is a device that measures the pressure of the engine oil. It’s usually located on the dashboard and can alert the driver if the oil pressure is too low, indicating a problem with the engine.

8. Oil Pressure Sensor

The oil pressure sensor is a device that measures the pressure of the engine oil. It sends a signal to the car’s computer system, which can then alert the driver if the oil pressure is too low.

9. Oil Pressure Switch

The oil pressure switch is a device that sends a signal to the car’s computer system if the oil pressure drops below a certain level. This can indicate a problem with the engine, allowing the driver to take action before serious damage occurs.

10. Oil Pump

The oil pump is responsible for circulating the engine oil throughout the engine. It’s usually driven by the engine itself and is essential for keeping the engine lubricated and running smoothly.

11. Oil Suction Filter

The oil suction filter is responsible for removing contaminants from the oil before it enters the oil pump. It’s an essential component of the engine’s lubrication system and helps to prevent damage to the engine.

12. Outer Tie Rod

The outer tie rod is a critical component of the car’s steering system. It connects the steering knuckle to the steering gear and is responsible for transferring the force from the steering gear to the wheels.

13. Outlet Pipe

The outlet pipe is an essential part of a car’s exhaust system. Its primary function is to carry the exhaust gases from the engine to the muffler and then to the tailpipe. The outlet pipe also helps to reduce engine noise and emissions.

14. Output Shaft

The output shaft is a component of the transmission system. It’s responsible for transferring power from the transmission to the wheels, allowing the car to move forward or backward.

15. Overdrive Unit

The overdrive unit is a component of the transmission system that allows the car to achieve higher speeds while using less fuel. It’s usually engaged when the car reaches a certain speed, reducing the RPMs of the engine and improving fuel efficiency.

16. Oxygen Sensors

Oxygen sensors are a critical component of the car’s emissions control system. They measure the amount of oxygen in the exhaust gases and send a signal to the car’s computer system, which can adjust the air-fuel ratio to reduce emissions.


In conclusion, car parts that start with O may seem insignificant, but they play a critical role in keeping your car running smoothly and efficiently.

From the odometer to the oxygen sensors, each of these parts is essential for ensuring that your car stays on the road and performs at its best.

Do you know any other car parts that start with the letter O that are not in the list? Share your answers in the comment section below and I’ll update the list as soon as possible.

And, if you are looking for other car parts that starts with other letters, make sure you check my blog posts related to car parts starting with other letters. Such as:

  • Car Parts Start With Letter M
  • Car Parts Start With Letter N
  • Car Parts Start With Letter P
  • Car Parts Start With Letter Q

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