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 Volkswagen, Seat Altea Siemens Simos 7.1 06A906033DA 5WP4028604
Vendors's code: 5WP4028604
Product code: 5WP4028604
Barcode:
Code 39:
ISBN:
$83.18
Price
$83.18
$102.31
Price
$102.31
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, Seat Altea Siemens Simos 7.1 06A906033DA 5WP4028604
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
$30.69
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shipping
(Poland)
from
$30.69
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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 Siemens 5WP4028604 ECU for a Seat Altea?
This Simos 7.1 unit with VW number 06A906033DA comes from a 2005 Altea. It is used and in working order – before ordering, make sure your label shows 5WP40286 04.
Engine Control Unit Volkswagen, Seat Altea Siemens Simos 7.1 06A906033DA 5WP4028604
Siemens number 5WP40286 04 distinguishes this ECU from other Simos 7.1 units bearing the same VW number, 06A906033DA. This unit comes from a 2005 Seat Altea, and the VW number was also used in Volkswagen models. The Simos 7.1 is a Siemens petrol engine ECU that controls injection and ignition.
What to compare before buying
- 5WP4028604 – Siemens number, as shown on the label: 5WP40286 04
- 06A906033DA – VW part number
- Simos 7.1 – ECU type
The letters DA at the end of the VW number indicate the software or hardware version, while the Siemens number specifies the build of the unit. Both markings should match.
Symptoms of a faulty engine control unit
- the engine won't start even though the starter turns and fuel is getting through,
- no communication with the diagnostic tester,
- the engine warning light is on and injection or ignition faults keep returning despite working components,
- rough running or stalling at idle.
First check the ECU's fuses, power supply and earths – faults there produce similar symptoms.
Locked or unlocked
We sell this ECU in two versions. Locked – untouched, with the previous vehicle's data and immobiliser; chosen by workshops that do the unlocking, programming and matching in-house. Unlocked – prepared before dispatch, usually within 1–2 working days.
Which method is an option (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, cloning) depends on the part number, software and immobiliser. Contact us before buying and we'll check. You will find the full description on the page ECU preparation options.
Questions and answers
| I have a 06A906033DA with a different Siemens number – will this one work too? |
|---|
| We can't promise that without checking. Send a photo of the label and we'll compare the two units and advise what to choose. |
| How long does it take to prepare the unlocked version? |
| Usually 1–2 working days before the parcel is sent. Beforehand, we confirm which unlocking method is possible for this unit. |
| What condition is this ECU in? |
| It is a used part, in working order and in good condition. You will find the warranty period in the product features table. |
We're happy to help you choose – email contact@auto24parts.com and give us all the numbers from the casing of your current unit.
