The master cylinder reservoir is attached to the master cylinder, which is located under the hood on the left side of the vehicle.

The reservoir must be kept properly filled to ensure adequate reserve fluid for the hydraulic system. However, because of expansion due to heat absorbed from the brakes and engine, the reservoir must not be overfilled.

Thoroughly clean the reservoir cap before removal to avoid getting dirt into the reservoir.

A properly maintained brake system should not need fluid to be added. Fluid level under normal conditions will go below the max fill mark on the reservoir due to brake pad wear. Topping off the reservoir is not recommended in this instance because the reservoir will be over filled when the brake pads are replaced.