The brake fluid reservoir is usually located in the engine bay, near the back of the compartment on the driver’s side, mounted on or directly above the brake master cylinder and brake booster, close to the firewall.

Typical location under the hood

  • In most modern cars, the brake fluid reservoir sits at the rear of the engine bay, roughly in line with where the brake pedal is on the other side of the firewall.
  • It is commonly on the driver’s side, under the hood, attached to or just ahead of the brake master cylinder and the round brake booster.

What it looks like

  • The reservoir is usually a small, semi‑translucent plastic container with “MIN/MAX” level markings and a black cap, often marked with a brake warning symbol.
  • On some older vehicles, the reservoir may be a metal box-type master cylinder with a removable lid instead of a plastic canister.

If you’re not sure

  • Exact placement can vary by make and model, so the owner’s manual will usually show the precise location and cap markings.
  • If you still cannot find it, many manufacturer or parts-store websites and videos show model‑specific under‑hood diagrams you can match to your car.