Volkswagen engine control units – used ECUs for the Golf, Passat, Polo and T5
Golf, Polo, Passat or T5 – find your ECU by the number on its label
This category contains used engine control units for Volkswagen: mostly for the Golf, Polo and Passat, and also for the Transporter T4 and T5, Crafter, Caddy, Lupo and Sharan. Type the number from your ECU label into the shop search, e.g. 03G906021NG or 036906034BB. Not sure which unit fits? Send us a photo of the label – we will check the match before you buy.
List of products
How to read the numbers on a Volkswagen ECU
A Volkswagen ECU label usually carries two numbers. The first is the VW part number, e.g. 070 906 016 DS. The second comes from the module manufacturer: Bosch (0 281… for diesel engines, 0 261… for petrol engines), Siemens or Continental (5WP… numbers), Magneti Marelli (61600… numbers and IAW codes) or Delphi. The same VW number is sometimes also used in Audi, SEAT and Skoda cars – each listing names the vehicles given in our data. The letter at the end of the VW number identifies a specific version: 03G906016AL and 03G906016HK are different units, so always compare the full number.
Examples of ECUs in this category
- Passat 1.9 TDI: Bosch EDC16U34 03G906021NG / 0281013437
- T5 2.5 TDI: Bosch EDC16U31 070906016DS / 0281014252
- Polo 1.4 (petrol): Magneti Marelli IAW 4LV.K 6K0906034C
- Golf 1.6 FSI: Bosch MED9.5.10 03C906056AK / 0261S02071
ECUs for other makes are in the engine control units category.
Which version can you buy
Most units are offered locked or unlocked. A locked unit still holds the data and immobiliser of the previous car – the choice for a workshop that will program and adapt it itself. An unlocked unit is prepared by us before dispatch. Some listings also offer other options, such as IMMO OFF – these are named in the product description. All versions are explained on the ECU preparation options page.
Before you order an ECU
An engine that will not start, no connection with the diagnostic tester or limp mode can point to a faulty ECU. A weak battery, a corroded earth, a chafed wiring loom or water in a connector cause the same symptoms, though – check them before you buy.
Questions and answers
| Question | Answer |
|---|---|
| Which number matters most when choosing? | The VW number including the letter at the end, and the module manufacturer number. The same model and engine size do not guarantee that the unit will fit. |
| Can an ECU from an Audi, SEAT or Skoda fit a Volkswagen? | It can, if the numbers on the label are the same. If in doubt, ask us before you buy. |
| Will the ECU work straight after fitting? | A locked unit has to be programmed and adapted to the immobiliser. For the other versions it depends on the preparation method, which we agree with you before purchase. |
| What warranty do the ECUs have? | The warranty period is listed in the specifications of each product. |
Not sure which ECU fits your Volkswagen? Contact us and send a photo of the label.