BMW 1 3 Series E87 LCI E90 E91 N47 DDE 7811701 Engine Control Unit Diesel ECU

The BMW E87 LCI E90 E91 Diesel Engine Control Unit ECU is a factory module from the electronic control units and controllers group, designed for BMW 1 and 3 Series diesel engines. It is responsible for precise management of the engine's operation, ensuring stable power characteristics, fuel injection control, and cooperation with other vehicle systems.

Specifications and technical data

• SKU: 7811701-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811701
• Substitutable numbers: 13617809001, 7809001, 13618506281, 8506281, 13617812501136178100011361781170113617807143, 7812501781000178117017807143, 13617807204136178120011361780782813617807529, 7807204781200178078287807529, 136185087121361780840313617806700, 85087127808403780, 22316872019, 6872019, 22316772031, 6772031
• Fuel type: Diesel
• Category: ECUs & Computer Modules

Application and Function of the BMW Diesel Engine Controller

The engine controller in BMW E87 LCI, E90, and E91 models plays a crucial role in managing the operation of the diesel engine. It analyzes signals from sensors, controls fuel injection, boost pressure, and interacts with safety and comfort systems. This ensures the engine operates in an optimized manner, maintaining proper running smoothness and predictable response to the accelerator pedal.

The presented ECU module is an original BMW part, which translates to proper compatibility with the vehicle's electrical system, wiring harnesses, and electronic architecture. This is a particularly beneficial solution for repairs after controller failure, starting problems, or unstable engine operation.

Benefits of Using an Original ECU Controller

Choosing an original engine controller for BMW 1 and 3 Series diesel engines allows for maintaining software consistency and operating parameters with the manufacturer's factory specifications. This is important for both daily use and subsequent computer diagnostics – the module communicates correctly with service testers and other controllers in the vehicle.

The main advantages of this solution include:

• Full integration with the factory system – connectors, pinout, and communication protocols are consistent with the original.
• The ability to retain factory engine operating maps, without the need to adapt universal solutions.
• Simplified diagnostics and programming in specialized BMW service centers.
• Proper adaptation for diesel-powered engines, taking into account the specifics of the injection system and ancillaries.

Condition, Origin, and Installation Aspects

The offered controller is a used part from disassembly, allowing for economical repair of the engine control system while maintaining original manufacturing quality. This type of module is often chosen by workshops specializing in BMW, as it enables restoring vehicle functionality without the need to invest in a new, expensive component.

Before installation, standard procedures for BMW engine controllers should be considered, such as potential programming, adaptation to a specific vehicle instance, or synchronization with the immobilizer. In practice, this is usually carried out by a specialized service center or car electrician using appropriate diagnostic software.

Compatibility with Diesel Fuel System

This controller is designed for Diesel-powered engines, meaning its operating logic, injection maps, and control algorithms are tailored to the specifics of BMW diesel engines. This is important when selecting parts – the module should only be used in configurations intended by the manufacturer, with appropriate ancillaries and injection system.

In practice, this translates to proper control of fuel quantity, rail pressure, turbocharger operation, and cooperation with exhaust emission control systems. This allows the vehicle to maintain parameters close to factory specifications, and the powertrain operates in a stable and predictable manner.

Related BMW Electronic Control Units and Technical Knowledge

If you are looking for other BMW electronic control units and controllers, including solutions for different series and engine versions, check out our dedicated category: BMW electronic control units and controllers. You will find a wide selection of disassembled parts that allow for comprehensive servicing of electronic systems in your car.

When planning repairs or upgrades to electronic systems in BMW 3 and 5 Series models – including FRM modules, the iDrive system, or engine controllers – it is worth familiarizing yourself with practical tips described in the article: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models Using Disassembled Parts?. This is a valuable source of knowledge on the safe use of used electronic components in BMW cars.