- Seals your brake master cylinder reservoir
- Helps protect brake fluid from moisture and debris
- Replace when broken or missing
Your Nissan's braking system includes a brake master cylinder that stores the brake fluid. The reservoir might hold the fluid, but your Nissan Brake Master Cylinder Reservoir Cap helps keep the fluid safe from contaminants and stop it from splashing out or leaking.
Most brake fluids absorb moisture from the air. If enough moisture is absorbed, it can lower the boiling point of your brake fluid and cause your brakes to become less effective. The Brake Master Cylinder Reservoir Cap helps keep this moisture out and prolong the life of your brake fluid. While you might be tempted to drive without a Brake Master Cylinder Reservoir Cap, it's not recommended for this reason.
If something's wrong with your Brake Master Cylinder Reservoir Cap, you might not realize it until it's too late. To help make sure the cap is in place and working right, it's a good idea to visually inspect it occasionally. You should check for cracks and make sure it's sealing the reservoir completely. After brake maintenance services or a brake fluid change, you should confirm that the mechanic remembered to replace the cap correctly.
When your Brake Master Cylinder Reservoir Cap is missing or damaged, a replacement is needed. Without it, you risk contaminants and moisture entering your brake fluid and potentially causing brake failure. The cap is easy to replace on your own — simply tighten it onto the reservoir. Still, it's also a good idea to take your Nissan into the nearest service center to check the moisture in your brake fluid, especially if you don't know how long your reservoir has been exposed to the elements. Normally, your brake fluid should have less than 3% water.
Don't jeopardize your brakes. Shop OEM-made parts to find a Brake Master Cylinder Reservoir Cap that fits your Nissan.
The Brake Master Cylinder Reservoir Cap, part 460204CU0A, works with Nissan Altima 2019-2022. Find more information under the What This Fits tab.
CAP ASSY-BRAKE OIL RESERVOIR TANK
Fits Altima