Audi A4 B7 3.0 TDI BKN 204HP Quattro Engine Automatic 8E0907401AJ Key + Ignition

Description

Audi A4 B7 3.0 TDI BKN 204HP Quattro Engine Automatic Key + Ignition with ignition switch and key is a complete set from the Electronic control modules and controllers group, designed for vehicles with all-wheel drive and an automatic transmission. This solution allows for a coherent replacement of the engine control electronics, ensuring proper cooperation with the diesel powertrain and factory security systems.

Specifications and technical data

• SKU: 8E0907401AJ-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0907401AJ
• Substitutable numbers: 8E0907401AJ, 8E0 907 401 AJ, 0281011760, 0 281 011 760, 8E0910401F, 8E0 910 401 F
• Fuel type: Diesel
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and configuration of the set

The presented set includes the Engine Control Unit along with the components necessary for operation in a specific Audi A4 B7 3.0 TDI BKN 204HP model with Quattro drive and an automatic transmission. Combining the engine controller with a matched ignition switch and key allows for maintaining the consistency of the immobilizer system and starting logic, which is particularly important in modern electronic systems.

The solution is dedicated to diesel units, ensuring that the control logic for fuel dosage, boost pressure, and accessory operation is consistent with the requirements of the diesel engine in this model configuration.

Function of the engine controller in the powertrain

In this Audi model, the controller from the Electronic control modules and controllers family is responsible for:

• managing the operation of the diesel engine (control of injection, boost, combustion parameters),
• cooperation with the automatic transmission in terms of transmitting key load data,
• handling OBD diagnostic functions, including recording and sharing error codes,
• communication with other comfort and safety modules via vehicle data buses.

Thanks to this set, it is possible to restore the correct operation of the engine control system in the event of damage to the existing module or communication problems between the controller and the vehicle’s security system.

Integration with Quattro drive and automatic transmission

The version intended for the Audi A4 B7 3.0 TDI BKN 204HP Quattro has been designed to work with all-wheel drive and an automatic transmission. This means that the control maps and communication algorithms take into account the specifics of the drivetrain, which is important for:

• smooth gear shifting in automatic mode,
• engine response to load under varying traction conditions,
• stability of driver assistance systems.

A controller configured in this way allows for maintaining the driving characteristics factory-intended for this engine and drivetrain version, which is significant both from the point of view of comfort and component durability.

Characteristics of the used ECU + ignition switch + key set

The offered set is a used item, sourced from dismantling, which allows for economical repair while maintaining the original manufacturer’s specifications. A set of this type is particularly useful in situations where it is necessary to replace the controller along with related security system components, and manual programming from scratch would be time-consuming or expensive.

For workshops specializing in automotive electronics and for informed users, this is a practical solution enabling the restoration of vehicle efficiency while maintaining compliance with the factory electrical architecture.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as controllers, engine management modules, or systems cooperating with the ECU, check the available parts in the Audi electronic control modules and controllers category.

Technical support and knowledge about electronic modules

When working with advanced vehicle electronics, such as engine controllers, it is worth using reliable sources of knowledge regarding diagnostics, programming, and the selection of used modules. Practical tips on working with control systems and electronic modules can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?, which discusses good practices when using components from dismantling in modern cars.

If you are considering a choice between new and used electronic components, the cost and quality comparison described in the entry New or used? Comparison of costs and quality of car parts may also be helpful, which will facilitate making an informed purchasing decision in the context of controllers and ECU modules.