A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Engine Control Unit Skoda Roomster Siemens 03D906023B 5WP4040004
Vendors's code: 5WP4040004
Product code: 5WP4040004
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
Engine Control Unit Skoda Roomster Siemens 03D906023B 5WP4040004
Administratorem danych osobowych jest Auto24parts. Przetwarzamy je w celu przesłania odpowiedzi na zapytanie. Więcej informacji dotyczących przetwarzania danych osobowych znajduje się w polityce prywatności.
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.
Looking for a 03D906023B ECU for a Skoda Roomster?
This Siemens unit, with the number 5WP40400 04 on its label, comes from a Roomster with a petrol engine. It is used and fully working; choose the locked version for a garage or have it unlocked by us.
Engine Control Unit Skoda Roomster Siemens 03D906023B 5WP4040004
The Skoda Roomster with a petrol engine uses an ECU that continuously adjusts the fuel quantity and ignition to the operating conditions. This unit was made by Siemens, and its number 5WP4040004 belongs to the Siemens VDO / Continental numbering system. In the VW/Skoda catalogue, the unit has the number 03D906023B. We do not state the engine size – the numbers are what you use to match the part. The ECU is used, fully working and in good condition.
Numbers from the sticker
- 03D906023B – VW/Skoda part number
- 5WP4040004 – Siemens number, shown on the label as 5WP40400 04
The letter "B" at the end of the VW number denotes the software or hardware version. 03D906023 units with a different letter are different versions, so compare the full number with your ECU.
Symptoms of a faulty ECU
- the engine will not start or stalls straight after starting,
- rough running and fluctuating revs,
- no connection with the engine module during diagnostics,
- the engine warning light is on despite the sensors working.
First check the unit's power supply and earths – this is the most common cause of similar symptoms.
Version to choose: locked or unlocked
When buying this ECU, you decide who will prepare it. If your mechanic has programming equipment, choose locked – with the data and immobiliser of the previous car, for unlocking, programming and adaptation on their own. If you would rather our specialists did it, choose unlocked: we prepare it before dispatch, usually within 1–2 working days.
With this unit, not every method – PIN / CAR PASS, Virgin, IMMO OFF, auto-programming, clone – will necessarily be possible; it depends on the part number, software and immobiliser. Please ask before you buy. Description: engine control unit variants.
Questions and answers
| Does the 03D906023B ECU fit every Roomster? |
|---|
| No. Match the unit by the number on the label, not by the car model. |
| Is this an ECU for a diesel engine? |
| No, this unit comes from a Roomster with a petrol engine. |
| What condition is the unit in? |
| Used, fully working, in good condition. You will find the warranty period in the product specifications table. |
Email contact@auto24parts.com with the numbers from your ECU – we will check compatibility.
