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 Skoda Continental 03L906023LL 5WP42687AA
Vendors's code: 5WP42687AA
Product code: 03L906023LL
Barcode:
Code 39:
ISBN:
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
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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.
Where can I find the number 03L906023LL on the ECU casing?
VW number 03L906023LL and Continental number 5WP42687AA are printed on the unit's sticker. This is a used, fully working diesel engine control unit from a Skoda – and it is these numbers that decide compatibility.
Engine Control Unit Skoda Continental 03L906023LL 5WP42687AA
This diesel engine control unit was made by Continental. The number 5WP42687AA comes from the 5WP numbering system used by Siemens VDO and later by Continental. In the VW/Skoda catalogue, the unit has the number 03L906023LL. We do not state the car model or engine size – the numbers on the label decide whether the unit fits. The ECU is used, fully working and in good condition.
Numbers on the label
- 03L906023LL – VW/Skoda part number
- 5WP42687AA – Continental number
The letters "LL" at the end of the VW number denote the software or hardware version, and the suffix "AA" in the Continental number is also part of the designation. Compare both numbers with your unit in full.
Symptoms that suggest the ECU
- the diesel engine will not start despite the fuel system working,
- limp mode and reduced power with no sensor fault,
- no communication with the unit,
- rough engine idling.
Start by inspecting the connector and measuring the supply voltage – this is often enough to rule out a unit failure.
Two versions to choose from
We offer the ECU locked or unlocked. The first retains the immobiliser and data from the previous car – it is bought by garages that will unlock, program and adapt it themselves. We prepare the second before dispatch, usually within 1–2 working days.
Available methods include PIN / CAR PASS, Virgin, IMMO OFF, auto-programming and clone, but not every one will work with every unit – it depends on the part number, software and immobiliser. Please ask before you buy. Description: engine control unit variants.
Questions and answers
| Which Skoda model does the 03L906023LL ECU fit? |
|---|
| We do not state the model – compare the number 03L906023LL and the Continental number with the label on your ECU. |
| Is this a petrol or diesel ECU? |
| Diesel. |
| What condition is the unit in? |
| Used, fully working, in good condition. You will find the warranty period in the product specifications table. |
| What should I send before ordering? |
| A photo of the label on your current ECU – we will use it to check the possible unlocking methods. |
Please send any questions to contact@auto24parts.com.