BMW 3 Series E87 E90 E91 Vacuum Hose Pipe Line Diesel M47 7785449

BMW 3 Series E87 E90 E91 Vacuum Hose Pipe Line Diesel M47 is an original vacuum system component designed for BMW M47 diesel engines. It ensures stable vacuum pressure within the engine accessory control system, which translates into predictable engine performance. This is a practical solution for users seeking factory fitment and consistency with the vehicle's original configuration.

Specifications and technical data

• SKU: 7785449-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7798312
• Substitutable numbers: 11667798312, 7798312, 11667789391, 7789391, 11667785449, 7785449, 1166779725634336766087, 7797256, 6766087, 34337802676, 7802676
• Fuel type: Diesel
• Category: Other Interior Parts & Accessories

Purpose and function in the M47 diesel engine

The vacuum hose in a diesel engine plays a key role in transmitting vacuum to actuators and control valves for engine accessories. In M47 units, it is responsible for the proper operation of vacuum-dependent systems, which affects engine refinement, throttle response, and operational stability. Using a dedicated hose for this engine unit helps maintain consistency with the manufacturer's factory specifications.

Compatibility and reference numbers

The offered item is part of the original BMW system, which facilitates selection for specific vehicle configurations. The hose has an assigned OEM part number and a set of interchangeable numbers, allowing it to be precisely verified against the existing installation in the car. This identification method reduces the risk of ordering errors and helps maintain compliance with service documentation.

If you have any doubts regarding selection based on manufacturer or replacement numbers, it is worth using the practical tips included in the guide on verifying parts online – it is described in detail in the article how to safely select components by OEM numbers and avoid mistakes when purchasing BMW parts.

Technical characteristics and role in the vacuum system

The hose has been designed to operate in an environment typical for diesel engines, where variable loads, vibrations, and elevated temperatures occur. The hose construction is adapted to maintain the tightness of the vacuum system, which is important for stable control of accessory components. A properly selected vacuum hose helps reduce power drops resulting from leaks and unstable operation of vacuum-controlled systems.

The fuel type specified for this component is Diesel, meaning it is intended to work with the operating characteristics of diesel units, including specific vacuum values and operating conditions typical for M47 engines.

Product condition and service application

The item is offered in a used condition, making it a reasonable alternative for maintenance repairs when the priority is to maintain the original specification while optimizing costs. This type of hose is suitable both for replacing a damaged section of the vacuum installation and for the staged restoration of the accessory control system in a diesel engine.

Thanks to the retention of factory geometry and connections, the hose facilitates installation in the existing system without the need for modifications or fitting universal replacements. This solution is particularly beneficial for workshops aiming to maintain consistency with service documentation and for users who value original BMW components.

Expanding technical knowledge and parts selection

When working with diesel units, it is worth expanding your knowledge about the structural differences between individual engine lines and equipment versions. An interesting supplement may be the material comparing RS sports versions with standard models, which discusses, among other things, differences in engines, brakes, and chassis – more information can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?. Although it concerns a different brand, it clearly shows how important the proper selection of elements for a specific vehicle configuration is.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as vacuum hoses, vacuum control lines, or additional sections of the vacuum installation, check the available parts in the Other BMW category.