The automatic transmission control unit (often designated as TCU or TCM) is a crucial electronic component responsible for smooth and trouble-free gear shifting. Its failure, most often caused by overheating, short circuits, or water damage, results in jerking, an inability to shift gears, or the vehicle entering limp mode. Purchasing a new module at an authorized dealership is a massive expense, which is why replacing it with a fully functional, used original is the most reasonable solution.
Engine Control Unit Volkswagen Golf 1.6 TDI 03L906023MK 5WP42690AA
Vendors's code: 5WP42690AA
Product code: 5WP42690AA
Barcode:
Code 39:
ISBN:
€243.90
Price
€243.90
€300.00
Price
€300.00
Select a product option:
Individual variants may differ in price
product option
Important: Depending on the ECU type and vehicle model, not all of the options listed below may be available.
To select the correct option for your vehicle and ECU, please contact us before purchasing:
contact@auto24parts.com
1. Locked
This option is intended for professional workshops with the required specialist equipment and technical knowledge.
The ECU has been removed from a vehicle intended for recycling and still contains the immobilizer data and other information from the previous vehicle. Before it can be used in another car, it must be unlocked and then programmed using specialist automotive diagnostic equipment.
2. Unlocked
Several preparation methods may be available. The possible options depend on the ECU type, vehicle model and immobilizer system. Please contact us before purchasing, as some preparation methods are not available for every ECU.
Our electronics specialists can prepare the ECU in one of the following ways:
a) ECU with PIN code (Car Pass)
The PIN code is supplied, but programming with a suitable diagnostic tool is still required. After installing the ECU, it must be reset using the supplied PIN code and then programmed to the vehicle’s immobilizer system.
b) VIRGIN ECU
The data from the previous vehicle is removed and the ECU is restored to a clean, factory-like state. After installation, it must be programmed to the vehicle using a compatible specialist diagnostic tool. Unless another preparation method is specified in the product description, this is the standard unlocking option for most of our ECUs.
c) Plug & Play – IMMO OFF
The immobilizer function is disabled in the ECU. After installation, the engine can start without additional immobilizer programming. Please note that the vehicle will no longer have an active immobilizer function, and an immobilizer warning light or fault code may remain, depending on the vehicle model.
d) Plug & Play – Automatic Programming
After installation, the ECU automatically learns and saves the required vehicle data. No additional programming is normally required.
e) Plug & Play – 1:1 Clone
The data from your original ECU is copied to another fully functional ECU. The cloned unit is then ready for installation without additional programming.
You must send us your original ECU so that we can transfer its data to the replacement unit.
The original ECU must have working communication with the vehicle, a diagnostic tool or our programming equipment. If the required data cannot be read, a complete 1:1 clone may not be possible.
3. Complete Plug & Play Set
A complete matched set containing the ECU, immobilizer components and all other parts required to start the vehicle without additional programming. All components supplied in the set must be installed in the vehicle.
Important:
Dispatch time depends on the selected option. If an unlocked or specially prepared version is ordered, the preparation service usually requires an additional 1–2 business days.
Ask about the product
Engine Control Unit Volkswagen Golf 1.6 TDI 03L906023MK 5WP42690AA
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Shipping
from
€30.00
-
shipping
(Poland)
from
€30.00
-
shipping
(Poland)
Price 30 euros applies shipments to 5 kg on worldwide. Above this weight, please contact us by email to check price
Shipping cost for the selected product
The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
Will the 03L906023MK ECU fit your Golf 1.6 TDI?
It will if the label on your module shows VW number 03L906023MK and the number 5WP42690AA (written on the label as 5WP42690 AA). This is a used, fully working engine ECU from a Golf 1.6 TDI.
Engine Control Unit Volkswagen Golf 1.6 TDI 03L906023MK 5WP42690AA
The Golf 1.6 TDI uses an engine control unit with VW number 03L906023MK. The module controls common rail injection and boost, and uses sensor data to keep the diesel engine running properly. The second number, 5WP42690AA, comes from the Siemens VDO / Continental numbering system.
Numbers to compare
- 03L906023MK – Volkswagen part number; MK denotes the version
- 5WP42690AA – Siemens VDO / Continental number, shown on the label as 5WP42690 AA
The 03L906023 format exists in many versions. Choose this module if both numbers match, including the letters MK.
Fault symptoms in the 1.6 TDI
- the engine will not fire although the starter works,
- the car goes into limp mode for no obvious reason,
- diagnostics cannot connect to the engine computer,
- rough idling even though the injectors are fine.
Start by checking the ECU's power supply and earths – this rules out the simplest causes and helps avoid an unnecessary purchase.
Locked or unlocked?
Two versions are available. A locked ECU holds the data and immobiliser from the previous vehicle – this is for workshops that will unlock, program and adapt the module themselves.
We will prepare an unlocked one before dispatch, usually within 1–2 working days. The method – PIN / CAR PASS, Virgin, IMMO OFF, auto programming or clone – depends on the part number, software and immobiliser, so not every one is possible. Ask before you buy and see the ECU options page.
Questions and answers
| Are 5WP42690AA and 03L906023MK the same ECU? |
|---|
| Yes, they are two numbers of one module. |
| Will a module with a different letter after 03L906023 also fit? |
| Do not assume so – the letter denotes the version. |
| Will the engine run after fitting the locked version? |
| No, it needs to be unlocked, programmed and adapted. |
| What condition is the ECU in? |
| Used, fully working, in good condition. You will find the warranty period in the product features table. |
Send a photo of the label to contact@auto24parts.com – we will compare the numbers before you buy.
