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 1.6 Siemens 6K0906025A 5WP4340
Vendors's code: 5WP4340
Product code: 5WP4340
Barcode:
Code 39:
ISBN:
€142.28
Price
€142.28
€175.00
Price
€175.00
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, Seat 1.6 Siemens 6K0906025A 5WP4340
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 6K0906025A ECU for a 1.6 engine?
This used Siemens unit in working order, number 5WP4340, comes from a vehicle with a 1.6 petrol engine – this ECU was used in Volkswagen and Seat models. Before buying, compare both numbers with the label on your unit.
Engine Control Unit Volkswagen, Seat 1.6 Siemens 6K0906025A 5WP4340
The 1.6 petrol engine in Volkswagen and Seat vehicles may work with the Siemens ECU bearing VW number 6K0906025A. The unit controls fuel injection and ignition, and its failure can immobilise the car completely. The 5WP4340 marking is the Siemens number in the 5WP… range used by Siemens VDO / Continental.
How to identify this ECU
- 6K0906025A – VW part number with the letter A
- 5WP4340 – Siemens number
The letter A distinguishes this unit from the 6K0906025 version without a suffix and from other variants. It matters when matching, because it indicates a specific software or hardware version.
Typical fault symptoms
- the engine warning light stays on and cleared faults return immediately,
- the engine jerks, loses power or goes into limp mode,
- the tester cannot see the ECU,
- starting problems after water ingress or a voltage spike.
The first step should be measuring the supply voltage and checking the earths – only then replace the unit.
How we prepare the ECU for dispatch
The unlocked version is prepared before the parcel is sent, usually within 1–2 working days. The method depends on the number 6K0906025A, the software and the vehicle's immobiliser – options include PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning, but not every one is feasible for this unit. Please ask before buying.
The other option is the locked version – with the previous vehicle's data and immobiliser, intended for workshops that unlock, program and match the ECU themselves. Details of both options: ECU preparation options.
Questions and answers
| Will 6K0906025A replace an ECU without the letter A? |
|---|
| Don't assume so. The versions differ in software or hardware – send us a photo of the label and we'll check compatibility. |
| Can any workshop program the locked version? |
| It requires equipment for programming and immobiliser matching. If your mechanic doesn't have it, the unlocked version is the more sensible choice. |
| What warranty covers this unit? |
| You will find the warranty period in the product features table. The ECU itself is used, in working order and in good condition. |
Before buying, get in touch: contact@auto24parts.com. Send the numbers from the label and we'll confirm the available preparation options.
