Bosch and Continental engine ECUs for Volkswagen
We supply used engine control units for Volkswagen passenger cars and commercial vehicles, each tested before dispatch. The range covers TSI and FSI petrol engines – including the Golf V and VI, Jetta, Passat, Touran, Polo and Tiguan – and TDI diesels, from the 2.5 TDI in the Transporter T4 and LT, through the 2.0 TDI in the T5 and Amarok, to the 3.0 TDI in the Touareg. Most units are made by Bosch, complemented by selected Continental modules.
The engine control unit manages fuel metering, ignition on petrol engines, boost pressure and exhaust aftertreatment, and exchanges data with other modules in the vehicle. The exact scope depends on the engine and the ECU family.
How to choose the right Volkswagen engine ECU
The most reliable method is to compare the full numbers on the label of your original unit. Before ordering, check:
- the manufacturer number, e.g. Bosch 0281016384 or Continental 5WP4910101,
- the VW OEM number including the final letters, e.g. 03L906022CB or 074906018N,
- the ECU family, e.g. EDC16CP34 or MED17.5.5, if it is shown on the label,
- the software (SW) and hardware (HW) versions, if available,
- the engine code, power output and gearbox type,
- the preparation stated in the listing, e.g. IMMO OFF or for programming.
Numbers that differ by a single letter may indicate different software or configuration. The VW T4 and LT 2.5 TDI is a good example: we stock more than a dozen variants with the 074906018 number that differ only in the suffix. The VIN helps identify the vehicle version, but it does not replace the number on the ECU label.
Within the Volkswagen Group some ECUs are used across several brands, so this category also contains units listed for VW / Audi / Seat / Skoda. In these cases too, compatibility depends on the full part numbers rather than the car brand. Audi ECUs have their own category: Audi engine control units. If you are not sure, send us a photo of the original ECU label and your VIN and we will check compatibility before you order.
ECU families in our Volkswagen range
The table shows examples from our current stock. It is not a complete list of applications for each family.
IMMO OFF, programming and cloning of Volkswagen ECUs
The preparation method depends on the specific ECU platform. Not every method is available for every part number, so the preparation is always stated in the product description.
IMMO OFF units
On an IMMO OFF unit, the immobiliser function in the ECU is disabled. With a matching variant, the unit does not need to be paired with the car's immobiliser. IMMO OFF does not change hardware compatibility or the ECU configuration, however, so correct part-number matching is still essential. On newer platforms other modules may continue to check authorisation, so an immobiliser warning or stored fault may remain on the instrument cluster even though the engine runs normally.
Programming, cloning and VIRGIN
- Programming and adaptation – matching the ECU to the vehicle using suitable diagnostic equipment or a programmer.
- Cloning – transferring data from the original ECU to a compatible replacement unit. This requires the data to be read correctly from the old unit, which may not be possible after heavy corrosion or memory damage.
- VIRGIN – preparing selected units for fresh adaptation in the vehicle. Not every unit can be prepared this way.
ECUs for Volkswagen commercial vehicles
A large part of this category consists of ECUs for commercial vehicles. For the Transporter T4 and LT 2.5 TDI we stock many Bosch EDC15VM+ variants, for the T5 and Amarok 2.0 TDI Bosch units with 03L… numbers, and for the Crafter 2.5 TDI a Bosch EDC16CP34 unit. Selected ECUs for the T5 and T6 2.0 TSI are also available. On these models matching the full part number is especially important, because the same engine was produced with many software versions.
Examples of Volkswagen engine ECUs in stock
All available part numbers are shown in the product list above. Compare them with the label on your own ECU before ordering.
Symptoms of a faulty Volkswagen engine ECU
An ECU fault can show up in different ways. The most commonly reported symptoms are:
- the engine will not start,
- no diagnostic communication with the ECU,
- limp mode and reduced power,
- rough running or stalling,
- CAN communication faults stored in several modules,
- problems after interrupted programming,
- signs of moisture, corrosion or damaged connector pins.
Similar symptoms can be caused by faulty sensors, wiring, power supply, earths or fuses. No communication does not always mean the ECU is faulty, so we recommend diagnosing the vehicle before buying. You can read more in our guide to faulty ECU symptoms. If the fault codes point to ABS or ESP rather than the engine, see our Volkswagen ABS pumps.
Testing, warranty and delivery
Every ECU is bench-tested before dispatch, connected to a power supply and diagnostic tools outside the vehicle. Testing the unit does not, however, replace diagnosing your vehicle or finding out why the original ECU failed.
Warranty terms are stated in the product description, and the return and complaint procedure is on the returns and complaints page. Shipping information is on the delivery times and costs page, and the available payment options are listed under payment methods.
FAQ – Volkswagen engine ECUs
