4723020040 Toyota CAP ASSY, BRAKE MASTER CYLINDER RESERVOIR FILLER, Price: 8.04$, Weight: 0.024kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Toyota |
4723020040 |
CAP ASSY, BRAKE MASTER CYLINDER RESERVOIR FILLER |
30 |
0.024 |
2-3 |
8.04$ |
Originals
| Make | Number | Name | Availability | Weight, kg | Processing, days | Price | |
|---|---|---|---|---|---|---|---|
| Toyota |
CAP ASSY, BRAKE MASTER CYLINDER RESERVOIR FILLER
|
30 |
0.024
|
|
9.65$
|
? Toyota Brake Fluid Reservoir Cap
This small but important part seals the brake fluid tank on the master cylinder. It helps keep clean brake fluid inside the system and protects it from dust, water, and road dirt. For safe braking, the hydraulic system must stay closed and clean at all times.
⚙️ Why This Part Is Needed
The brake system works under hydraulic pressure. When you press the brake pedal, brake fluid transfers force from the master cylinder to the wheels. A good reservoir cap keeps the fluid level stable and prevents contamination that can damage seals, valves, ABS parts, and calipers.
? How It Works
The cap fits tightly on top of the brake fluid reservoir. Its seal blocks outside moisture, while the internal design allows safe pressure balance as the fluid level moves during normal brake use. This helps the master cylinder operate smoothly and reliably.
⚠️ If It Is Broken or Missing
A cracked, loose, or worn cap can let water and dirt enter the brake fluid. This may cause soft pedal feel, rust inside brake lines, ABS warning lights, fluid leaks, and reduced braking power. In severe cases, the vehicle may become unsafe to drive. Replace it quickly to protect the braking system and maintain proper road safety.