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 6K0906025 5WP4233
Vendors's code: 5WP4233
Product code: 5WP4233
Barcode:
Code 39:
ISBN:
€162.60
Price
€162.60
€200.00
Price
€200.00
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 6K0906025 5WP4233
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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.
What does the number 6K0906025 on the engine control unit mean?
It is the VW part number, while 5WP4233 is the ECU manufacturer's number. You will find both on the unit's label – if they match yours, this used, working ECU for a Volkswagen or Seat is the same version.
Engine Control Unit Volkswagen, Seat 6K0906025 5WP4233
Volkswagen and Seat cars with petrol engines used the engine control unit with VW number 6K0906025. The unit manages the engine: it meters the fuel, sets the ignition timing and controls idle speed. The second marking on the casing, 5WP4233, is the ECU manufacturer's number.
Numbers on the label
- 6K0906025 – VW part number, with no letter at the end
- 5WP4233 – ECU manufacturer number
This unit's VW number does not end in a letter. If your ECU shows a letter after 6K0906025, it is a different version – send us a photo of the label and we'll compare the markings.
When the ECU may be faulty
- the car cuts out straight after starting or won't start at all,
- no spark or injection on one or more cylinders despite working coils and injectors,
- intermittent communication with diagnostics,
- signs of moisture, corrosion or a voltage surge at the connector.
Before ordering the unit, inspect the plug and wiring loom – corroded contacts can mimic an ECU failure.
Two options to choose from
If you have a workshop with your own programming equipment, choose the locked version: the ECU retains the data and immobiliser from the vehicle it came from, and you carry out the unlocking, programming and matching yourself. The unlocked version is prepared in-house before dispatch – this usually takes 1–2 working days.
Not every method can be used on every unit: PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning. It depends on the part number, software version and type of immobiliser, so before buying, ask what is possible for the 6K0906025. More on the page ECU preparation options.
Questions and answers
| Is the 6K0906025A ECU the same unit? |
|---|
| Not necessarily. A letter at the end of the VW number denotes a different software or hardware version, so compare the full number together with 5WP4233. |
| What should I send before ordering? |
| A clear photo of your current ECU's label showing all the numbers, and which version you want to order. We'll use this to check the available options. |
| Is the ECU new? |
| No – it is a used unit, in working order and in good condition. You will find the warranty period in the product features table. |
If in doubt, email contact@auto24parts.com. We'll tell you whether this unit matches yours and which option to choose.
