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 Caddy Continental 03L906023PB 5WP42936AA
Vendors's code: 5WP42936AA
Product code: 5WP42936
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
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Where on the Caddy ECU should I look for the number 03L906023PB?
VW number 03L906023PB is on the sticker on the casing, next to Continental number 5WP42936 AA. This used, working ECU for a diesel Caddy is available locked or unlocked.
Engine Control Unit Volkswagen Caddy Continental 03L906023PB 5WP42936AA
The 03L906023PB ECU for the Volkswagen Caddy was manufactured by Continental – 5WP… numbers are Siemens VDO / Continental numbering. The module manages the diesel engine: it receives signals from the sensors and controls fuel injection. We do not state the engine size, so matching is based on the numbers.
Numbers on the label
- 03L906023PB – VW catalogue number; the letter suffix indicates the version
- 5WP42936AA – Continental number (on the sticker: 5WP42936 AA)
The PB suffix in the VW number denotes the software or hardware version. Also compare the Continental number – on the label it is written with a space as 5WP42936 AA.
Most common symptoms of a fault
- the engine will not fire even though the starter turns and fuel is getting through,
- no response after water damage, a voltage surge or failed programming,
- software cannot be read or written via the diagnostic port,
- internal ECU faults stored in the fault memory.
Also check that the immobiliser or key is not to blame – in that case, replacing the ECU will not help.
Options for this ECU
You have a choice of two preparation versions. A locked module contains the data and immobiliser from the donor car. It is usually bought by workshops that have the equipment for unlocking, programming and adaptation. With the unlocked version, we carry out all the preparation before dispatch, usually within 1–2 working days.
Not every unlocking method is possible for every ECU. PIN / CAR PASS, Virgin version, IMMO OFF, auto programming or clone – what is possible is decided by the number, software and immobiliser. Ask us before buying.
We have set out how we prepare ECUs on the ECU preparation options page.
Questions and answers
| What should I send before ordering the unlocked version? |
|---|
| A photo of the label or all the numbers from your current ECU. Based on these, we will check which unlocking methods are possible. |
| How long does it take to prepare the unlocked version? |
| Usually 1–2 working days, after which we dispatch the ECU. |
| Are 5WP42936AA and 03L906023PB the same ECU? |
| Yes, they are two numbers of one module: 03L906023PB was assigned by Volkswagen, and 5WP42936AA by Continental. |
| What are the condition and warranty? |
| The ECU is used, 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 check the numbers and options.