BMW E87 LCI E90 E91 120d 320d Diesel N47 Turbocharger Pressure Vacuum Valve

The BMW E87 LCI E90 E91 120d 320d Diesel N47 Turbo Vacuum Valve is an original turbocharger and parts component designed for BMW 1 and 3 Series diesel engines with the N47 unit. It enables precise control of turbine vacuum, resulting in stable boost operation and predictable throttle response.

Specifications and technical data

• SKU: 8506893-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506892
• Substitutable numbers: 11658506894, 8506894, 11657810203, 7810203, 8506893
• Fuel type: Diesel
• Category: Turbos & Parts

Purpose and function in the supercharging system

The turbine vacuum valve is responsible for controlling the turbocharger actuator in N47 diesel engines, used in models such as the BMW E87 LCI and E90/E91 120d and 320d. A properly functioning valve ensures adequate boost pressure throughout the entire rev range, resulting in smooth acceleration, stable power, and reduced risk of overcharging or undercharging.

Replacing a worn valve with a working OEM component is particularly important when experiencing symptoms such as power loss, limp mode, unstable boost pressure, or engine controller errors related to turbine operation.

Benefits of using the original vacuum valve

Choosing the original turbo vacuum valve for a BMW with an N47 engine ensures:

• Proper cooperation with the factory engine controller – operating parameters consistent with the ECU maps.
• Stable control of turbine geometry or wastegate actuator – predictable build-up of boost pressure.
• Reducing the risk of diagnostic errors related to incorrect vacuum control.
• Better engine refinement – smoother acceleration and a more linear torque curve.

By adapting it to a specific diesel engine family, the valve operates within the parameters specified by the manufacturer, which is crucial for the durability of the turbocharger and the entire intake system.

Condition, origin and use in a diesel engine

This part comes from the original BMW line and is classified as a used component in the Turbocharger and Parts category. These valves, which are removed from the exhaust system, are a popular choice as a cost-effective alternative to new components, while maintaining factory specifications and compatibility with diesel engine management systems.

Designed for diesel engines, the valve is adapted to the operating characteristics of engines with a high compression ratio, higher thermal load and specific requirements for turbocharger control in modern N47 engines.

Selection and technical compatibility

To properly select a turbocharger vacuum valve for your BMW, it's worth verifying compatibility with the specific N47 engine version and body generation (E87 LCI, E90, E91) based on the manufacturer's catalog data or the part numbers shown in the technical specifications. Using a component from the appropriate reference group simplifies installation and minimizes the risk of problems with matching connectors, vacuum ports, and mounting brackets.

If you have any doubts about the selection, it may be helpful to compare the shape of the body, the arrangement of the ports and the type of electrical connector with the valve currently installed in the vehicle.

Expanding the offer and knowledge about used parts

If you're looking for other turbochargers and parts for BMW, check out our dedicated BMW turbochargers and parts section. There, you'll find a wide selection of turbocharger components tailored to popular BMW models.

When planning to buy a used vacuum valve or other turbocharger components, it's worth familiarizing yourself with practical tips for choosing original components. Our guide will be helpful: The Best Used Car Parts – A Guide to the Most Popular Original Parts for Popular Car Makes and Models , where we discuss what to look for when purchasing aftermarket components.