BMW 1 3 E81 E87 E90 E91 E92 N43 N47 Brake Servo Unit Vacuum Pipe Hose 8678618

The BMW 1 / 3 Series E81 E87 E90 E91 E92 N43 N47 Brake Servo Vacuum Hose is an original brake system component designed to work with the brake servo and brake force regulator. Maintaining stable vacuum is crucial for effective brake assistance, therefore a properly selected hose significantly impacts driving safety. This genuine BMW OEM part has been specifically designed for N43 and N47 engines, ensuring a precise fit to the factory installation.

Specifications and technical data

• SKU: rhd-8678618
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8678618
• Substitutable numbers: 11668678618, 8678618, 11667601007, 7601007, 11667556619, 7556619, BG
• Category: Brake Servos

Purpose and Function in the Braking System

The brake servo vacuum hose is responsible for transporting vacuum from the engine to the servo, enabling the correct operation of brake assistance. In BMW 1 and 3 Series models with N43 and N47 engines, this component is precisely matched to the engine bay geometry, minimizing the risk of chafing and leaks.

As part of the brake servo and force regulator group, this hose works directly with the servo, influencing:

• brake force stability under various engine loads,
• brake pedal comfort,
• repeatability and predictability of the braking system's response.

Original BMW Origin and Replacement Numbers

This part comes from the BMW OE parts line, meaning it complies with the manufacturer's factory standards regarding material, inner diameter, shape, and mounting method. The hose has a dedicated OEM part number and assigned replacement numbers, making it easy to verify its compatibility with a specific vehicle configuration.

The presence of reference numbers allows for:

• checking compatibility with a specific engine and body variant,
• comparison with the currently installed part,
• selecting the hose based on BMW catalogs and professional service tools.

Condition, Application, and Benefits of Installation

The offered hose is used, allowing for an economical replacement while maintaining the original BMW specifications. This is a practical solution in situations where:

• the old hose shows signs of aging, micro-cracks, or leaks,
• problems with a hard brake pedal or uneven assistance operation occur,
• replacement is necessary as part of brake system repair or after a collision.

Choosing an OEM hose for the E81, E87, E90, E91, and E92 series with N43/N47 engines reduces the risk of installation issues, and maintaining the original hose geometry promotes trouble-free operation.

Professional Selection and Integration with Other Components

When working on the braking system, it's advisable to treat the vacuum hose as an integral part of the entire system. Hose replacement often goes hand-in-hand with checking the servo, flexible hoses, and brake force regulator. In our store, you will also find other components from the brake servo and force regulator category, facilitating comprehensive vehicle servicing.

If you are planning more extensive vehicle maintenance – including other systems – our guide on selecting and operating parts may be helpful. It discusses, among other things, principles of working with used OEM components, service procedures, and practical comparison tables: check the practical guide to selecting and maintaining vehicle components.

Summary

The BMW 1 3 E81 E87 E90 E91 E92 N43 N47 Brake Servo Vacuum Hose is a functional, original brake system component designed specifically for selected BMW models. It ensures the proper operation of brake assistance, maintains consistency with the factory installation, and is a sensible choice for users who expect compliance with manufacturer solutions while optimizing repair costs.