Audi Engine Control Units – ECU for TDI, TFSI and FSI

Audi Engine Control Unit – original used ECU and ECM modules

An Audi engine control unit ECU, also referred to as an ECM or engine computer, is responsible for managing engine operation and exchanging information with other electronic systems in the vehicle. Depending on the engine and ECU generation, it may control fuel injection, ignition, fuel pressure, electronic throttle operation, turbocharger boost and selected emissions-related functions.

Auto24Parts offers original used Audi engine control units for different generations of petrol and diesel vehicles. Audi models can use many different ECU families, including Bosch EDC, MED and ME systems as well as control units manufactured by Siemens and Continental. The most reliable way to select a replacement module is to compare all part numbers shown on the original ECU.

How to choose the correct Audi engine control unit

The same Audi model can use several ECU versions depending on engine code, model year, power output, transmission, emissions standard and vehicle configuration. For this reason, the vehicle model or engine capacity alone is not sufficient to confirm compatibility.

Before ordering, compare:

• the complete Audi / Volkswagen Group OEM number,
• the electronics manufacturer's part number,
• the ECU family, for example EDC17C46, EDC17C64, EDC17CP14, MED9.1 or ME7.1,
• hardware and software references when available,
• engine type and engine code,
• vehicle model and model year,
• transmission and relevant vehicle configuration.

Part numbers can also appear in different formats. For example, Bosch 0281019008 may be written as 0 281 019 008. Audi/VAG numbers such as 03L906018LT may also appear as 03L 906 018 LT. Both formats are useful when searching for the correct replacement ECU.

Audi OEM numbers and Bosch ECU numbers

Many Audi engine control units carry at least two important references: an Audi/VAG OEM number and a Bosch electronics number. Both should normally be considered when identifying the unit.

For example, the Bosch number 0281019008 is used together with the Audi/VAG number 03L906018LT and ECU family EDC17C46. Searching for all of these references together provides a much more precise result than searching only for “Audi ECU”.

Audi 0281019008 / 03L906018LT / EDC17C46

One of the available modules is the Audi Bosch 0281019008 / 03L906018LT / EDC17C46 engine control unit.

This ECU carries three important identification references: 0281019008, 03L906018LT and EDC17C46. The product is available in different preparation variants, so the required option should be selected according to the vehicle and the programming work that will be carried out after installation.

Audi 0281031012 / 04L906021CB / EDC17C64

Another available unit is the Audi Bosch 0281031012 / 04L906021CB / EDC17C64 ECU.

When searching for this module, the Bosch reference 0281031012, Audi/VAG number 04L906021CB and ECU family EDC17C64 should be compared with the original unit.

Audi 0281033072 / 04L906021HC / EDC17C64

The category also contains the Audi 0281033072 / 04L906021HC EDC17C64 engine ECU.

This example is particularly useful because both 0281031012 / 04L906021CB and 0281033072 / 04L906021HC belong to the EDC17C64 family, yet they carry different Bosch and Audi part numbers. The ECU family alone therefore does not confirm interchangeability.

Audi / Volkswagen 0261S02625 / 03H906032DQ / MED9.1

Some engine control units are used within more than one Volkswagen Group application. One example is the Bosch 0261S02625 / 03H906032DQ / MED9.1 ECU for Audi and Volkswagen.

The product carries the Bosch reference 0261S02625 together with VAG number 03H906032DQ. Where the same ECU family appears in several Volkswagen Group vehicles, compatibility should still be verified by the complete numbers and vehicle configuration.

Audi 0261207134 / 4Z7907551E / ME7.1

For older petrol applications, Auto24Parts also offers the Audi Bosch 0261207134 / 4Z7907551E / ME7.1 engine control unit.

The Bosch number can also be written as 0 261 207 134. When selecting this ECU, the Bosch reference and Audi number 4Z7907551E should be checked together.

Audi 8E0906018AH / 5WP40170 01

The catalogue also includes an Audi ECU 8E0906018AH / 5WP40170 01.

This type of numbering demonstrates why it is useful to search using both the Audi OEM reference and the electronics manufacturer's identification rather than relying only on a vehicle description.

Other Audi ECU numbers available in the catalogue

The Audi category contains many other Bosch and VAG references, including:

• 0281030910 / 04L906021BS,
• 0261203196 / 0261203197 / 8A0907311E,
• 0261201227 / 022906032HE / ME7.1.1,
• 0261206380 / 4B0907551G,
• 0281015236 / 03L906022HM / EDC17CP14,
• 0281018457 / 03L906018KK / EDC17C46,
• 0281031722 / 4G0907589D / EDC17CP44,
• 0261S02482 / 4F1910552H / MED9.1.

Searching by these exact references can help locate the required module much faster than searching only by Audi model or engine size.

Audi TDI engine control units

Audi diesel vehicles use several generations of electronic engine management systems. Examples in the current range include Bosch EDC17C46, EDC17C64, EDC17CP14 and EDC17CP44 control units.

Different diesel engines and model years may use different ECU hardware and software even when the vehicle has the same engine capacity. For this reason, phrases such as “Audi 2.0 TDI ECU” should always be followed by verification of the exact Bosch and Audi/VAG numbers.

Audi TFSI and FSI petrol engine ECUs

Petrol Audi applications include ECU families such as MED9.1, MED9.5.10 and ME7.1. These units manage functions associated with petrol engine operation such as injection, ignition, throttle control and, where applicable, turbocharger management.

The terms TFSI, FSI or petrol ECU are useful for narrowing the search, but the final selection should still be made using the full part numbers on the original module.

Bosch, Siemens and Continental Audi control units

The current Audi category includes control units from Bosch, Siemens and Continental. You can also browse other Bosch automotive control units and Siemens electronic modules available at Auto24Parts.

The manufacturer name alone does not confirm compatibility. Two Bosch or Siemens units may have identical connectors and similar housings while containing different hardware, software and immobiliser data.

Common symptoms of an Audi ECU problem

A faulty engine control unit can cause different symptoms, but similar problems can also be caused by wiring, sensors, actuators, power supply or other vehicle systems. Proper diagnosis should therefore be carried out before replacing the ECU.

• engine does not start,
• no diagnostic communication with the engine ECU,
• engine stalls or has difficulty restarting,
• limp mode or reduced power,
• injector or ignition control problems,
• incorrect throttle response,
• fuel pressure or boost-control faults,
• CAN communication errors,
• repeated fault codes after related components have been checked,
• internal memory or control-unit faults.

Before considering ECU replacement, check battery voltage, ECU power supply, grounds, fuses, relays, connectors and the vehicle wiring harness. A diagnostic trouble code alone does not prove that the control unit is defective.

Used Audi ECU – does it require programming?

A standard used engine control unit normally contains data from the previous vehicle. Depending on the Audi model and ECU generation, the replacement module may therefore require programming, adaptation, reset or transfer of the appropriate vehicle-specific data.

The exact procedure depends on the individual control unit. It is therefore incorrect to assume that every Audi ECU requires exactly the same programming process.

VIRGIN / prepared Audi engine control unit

For selected control units, it may be possible to prepare the ECU as VIRGIN / reset for subsequent adaptation to another vehicle.

After installation, additional programming, immobiliser synchronisation, coding or another diagnostic procedure may be required depending on the vehicle and ECU type.

For an explanation of the available solutions, see our ECU preparation options.

Audi ECU cloning

Another possible solution is Audi ECU cloning. If the required data can be correctly read from the original engine control unit, it may be transferred to a compatible replacement module.

Depending on ECU design, the transferred information may include the appropriate EEPROM or FLASH data, software, configuration, VIN and immobiliser-related information required for communication with the vehicle.

Cloning availability depends on the type and condition of the original ECU. If the necessary data cannot be read, another preparation method may be required.

Audi and Volkswagen ECU applications

Audi is part of the Volkswagen Group, and some control-unit references can appear across more than one VAG application. Examples in the Auto24Parts catalogue include units listed for both Audi and Volkswagen.

This does not mean that every Volkswagen ECU is automatically compatible with Audi. Full Bosch/VAG numbers, hardware, software and vehicle configuration must still be checked. Related products can be found in the Volkswagen engine control unit category.

Audi engine control units by part number

Searching for an Audi ECU by part number is one of the most accurate ways to find a replacement module. Examples from the Auto24Parts catalogue include:

• 0281019008 / 03L906018LT / EDC17C46 – Audi ECU
• 0281031012 / 04L906021CB / EDC17C64 – Audi ECU
• 0281033072 / 04L906021HC / EDC17C64 – Audi ECU
• 0261S02625 / 03H906032DQ / MED9.1 – Audi / Volkswagen ECU
• 0261207134 / 4Z7907551E / ME7.1 – Audi ECU
• 8E0906018AH / 5WP40170 01 – Audi engine control unit

Using exact Bosch, Siemens, Continental and Audi/VAG references creates a direct path from the number on the original ECU to the correct product page.

How to check Audi ECU compatibility before ordering

The best approach is to take a clear photo of the complete original ECU label. All Audi/VAG, Bosch, Siemens or Continental numbers and any additional hardware or software references should be visible.

If you need help selecting the correct module, contact Auto24Parts and send the ECU photo together with the Audi model, model year, engine capacity, power output and engine version.

You can browse the complete range in the Engine Control Unit – ECU category. Other Audi electronic parts can also be found in the Audi ABS pump category.

Before ordering, you can also read our How to Buy guide, Shipping & Delivery information and Returns, Warranty & Complaints conditions.

FAQ – Audi Engine Control Units