Tips Sahabat

10 Complete Components of Car Brake Master and Their Functions

10 April 2025
10 Komponen Master Rem Mobil dan Fungsinya Terlengkap

Talking about car braking systems, it cannot be separated from the function of the car's master brake. This component plays a significant role in the performance of the braking system in reducing speed. Considering its important function in the braking system, it turns out that this component has other components within it. To satisfy your curiosity, let’s learn about some components of the car's master brake along with their functions.

Types of Components in the Car Master Brake and Their Functions

The following will explain in detail the components within the car's master brake, complete with their functions.

1. Master Cylinder Body

As the name suggests, this component can be considered the housing for several components of the car's master brake such as the piston, reservoir tank, and seal. These components will work within the master cylinder body. As a result, hydraulic pressure can be generated by these components by converting mechanical movement.

2. Reservoir Tank

This car master brake component functions as a reservoir for brake fluid in the car. The brake fluid will later be used to push the piston towards the caliper. This condition will cause the brake disc to be clamped by the brake pads.

Read Also: How to Detect a Leaking Master Brake

3. Diaphragm

This component serves as a protector for the brake fluid to prevent it from being directly contaminated by outside air. It can also be referred to as a cover for the reservoir component so that the master brake can be protected from corrosion. 

4. Level Sensor

This master brake component functions as a signal giver when the brake fluid capacity starts to deplete or run out. If the amount of brake fluid begins to diminish, signs will appear such as the brake warning light turning on, brake fluid dripping on the floor, and the brakes becoming ineffective when going down a slope.

5. Inlet Port

This master brake component serves as the entry point or filling hole for brake fluid coming from the reservoir tank. The fluid will then move to the pressure chamber.

6. Outlet Port

The outlet port is the opposite of the inlet port. This master brake component functions as the exit point or outlet hole for brake fluid. Later, the brake fluid from the pressure chamber will be channeled to the caliper piston or wheel cylinder. 

7. Return Port

This component plays an important role in the risk of brake fluid leakage. If this component functions well, the risk of brake fluid leakage can be prevented. This component serves to close the valve part of the pressure chamber, allowing the brake fluid to return to the reservoir tank.

Read Also: How to Properly Replace the Car Master Brake Seal

8. Primary Piston

As the name suggests, the primary piston is the main piston of the car's master brake. This component is responsible for compressing the brake fluid within the master brake.

The primary piston channel is located at the front wheels of the car. For FR type vehicles, conventional pipes are usually used as the primary piston channel. Meanwhile, diagonal pipe channels are typically used by FF type vehicles. 

9. Secondary Piston

The secondary piston has a channel located at the rear wheels of the car. The function of this component is the same as that of the primary piston.

10. Return Spring

This component functions to return the primary and secondary pistons to their original position when the brake pedal is released. 

Thus, these are some components found in the car's master brake. To ensure that the braking system functions well and your safety is always maintained, it is advisable to regularly check and maintain the car's braking system.

Others Tips Sahabat
Kode Plat G Daerah Mana? Cek di Sini dan Pajaknya!
What Area is License Plate Code G? Check Here and Its Tax!
Have you ever seen a vehicle with the plate code G on the streets? If so, which region do you think the vehicle is from? Let's find out more by paying attention to the following review.

Which Regi

kode plat nomor belakang kendaraan
Vehicle License Plate Code and Its Region in Indonesia
License plates are a type of motor vehicle identification issued by the police (Korlantas Polri). Every vehicle such as motorcycles and cars must have a corresponding license plate. This is regulated
Jadwal SIM Keliling Kota Tasikmalaya 2026
Update the Mobile SIM Schedule for Tasikmalaya City 2025, Check the Location!
The Driver's License (SIM) must be renewed periodically every five years. Renewing your SIM on time is very important to avoid being ticketed while driving. If you are late, the SIM becomes inactive a
Apa itu Gearbox Mobil? Ini Fungsi, Penyebab Rusak & Solusinya
What is a Car Gearbox? Its Functions, Causes of Damage & Solutions
The car gearbox is one of the important components that support the performance of the car. However, not many people understand this component. To get to know it better, you need to pay attention to t
© Copyright 2026 PT Astra Daihatsu Motor. All rights reserved
Privacy Policy
Contact Us