• Seals your brake master cylinder reservoir
• Helps protect brake fluid from moisture and debris
• Replace when broken or missing

The brake master cylinder is the part of your INFINITI's braking system that contains the brake fluid. This reservoir might be responsible for holding the fluid, but your INFINITI Brake Master Cylinder Reservoir Cap helps protect the fluid from pollutants 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 make your brakes less effective. The Brake Master Cylinder Reservoir Cap helps keep this moisture out and extend your brake fluid’s life. While you may think driving without a Brake Master Cylinder Reservoir Cap is fine, it's not recommended for this reason.

If something's wrong with your Brake Master Cylinder Reservoir Cap, you might not notice until it's too late. To help ensure the cap is in position and working correctly, you should visually inspect it occasionally. Keep an eye out for cracks and make certain it's sealing the reservoir all the way. After having your brakes serviced or the fluid changed, you should double-check that the mechanic didn't forget to replace the cap.

When your Brake Master Cylinder Reservoir Cap is damaged or missing, you need to replace it. Without it, you chance contaminants and moisture entering your brake fluid and potentially causing brake failure. It's easy to replace the cap on your own — simply twist it onto the reservoir. Nonetheless, it's also a good idea to bring your INFINITI into the nearest service center to have the moisture in your brake fluid checked, especially if you're unsure how long your reservoir has been exposed to the elements. Typically, your brake fluid should have no more than 3% water.

Don't jeopardize your brakes. Shop OEM-made parts to find a Brake Master Cylinder Reservoir Cap that fits your INFINITI.

The Brake Master Cylinder Reservoir Cap, part 46020AL500, is suitable for INFINITI Altima 2007-2010. Find more information under the What This Fits tab.