Genuine 205-430-18-00 Brake Booster Check Valve

The Genuine 205-430-18-00 is an OEM brake booster check valve designed for Mercedes-Benz vehicles. This factory-original component maintains the vacuum seal within the brake booster assembly, ensuring consistent and reliable power-assisted braking performance.

The check valve acts as a one-way gate between the vacuum source and the brake booster. It holds vacuum in the booster even when the engine is off or vacuum momentarily drops, allowing for multiple assisted brake applications. A failed or leaking check valve can result in a hard brake pedal, increased stopping distances, or a hissing noise from the engine bay.

Key Features:

• Genuine OEM part — direct factory replacement, no modifications required
• Maintains vacuum integrity in the brake booster for consistent pedal feel
• One-way valve design prevents vacuum loss between the booster and engine intake
• Manufactured to original Mercedes-Benz specifications for fit, form, and function
• Helps eliminate hard pedal feel caused by vacuum leaks

Replacing this valve with a Genuine OEM part ensures proper sealing and long-term durability. This is a common maintenance item when diagnosing brake booster vacuum complaints on Mercedes-Benz vehicles.