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 Golf 03F906070FJ 5WP44729
Vendors's code: 5WP44729
Product code: 03F906070FJ
Barcode:
Code 39:
ISBN:
€243.90
Price
€243.90
€300.00
Price
€300.00
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 Golf 03F906070FJ 5WP44729
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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.
Does ECU 03F906070FJ fit my Volkswagen Golf?
It does if the label on your unit shows the same VW number 03F906070FJ and manufacturer number 5WP44729. We ship this used, working petrol engine ECU locked or unlocked.
Engine Control Unit Volkswagen Golf 03F906070FJ 5WP44729
If the engine control unit in your Golf has stopped working, the key is to choose a unit with identical markings. This one has VW number 03F906070FJ with the FJ suffix and manufacturer number 5WP44729. It controls injection and ignition in a petrol engine; it is used, working and in good condition, with no damage to the casing.
Numbers of this ECU
- 03F906070FJ – VW part number, the FJ suffix indicates the version
- 5WP44729 – manufacturer number
The letters FJ define the software and hardware version. If your unit has a different suffix or a different manufacturer number, contact us before ordering.
Unit failure symptoms
- no start despite working ignition and fuel pump,
- internal ECU faults and engine warning light permanently on,
- no communication with the diagnostic equipment,
- intermittent engine running with no sensor fault.
Start by checking the earths and the contacts in the connector – the simplest step before a replacement. It is also worth reading the fault memory to rule out a faulty sensor or wire.
ECU preparation option
You can order ECU 03F906070FJ unlocked – we will prepare it before dispatch, usually within 1–2 working days. Which method is used (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone) depends on the part number, software and immobiliser; not every one is available, so please ask before you buy.
The second option is the locked version – with the data and immobiliser of the previous car, for workshops that will unlock, program and match the unit themselves. More information: Engine control unit (ECU) variants.
Questions and answers
| Does the engine capacity matter when matching? |
|---|
| We do not state the capacity – the numbers 03F906070FJ and 5WP44729 on the label are what decide. |
| Does anything need to be done after fitting the locked version? |
| Yes: the ECU must be unlocked, programmed and matched to the immobiliser. |
| What condition is unit 5WP44729 in? |
| It is a used part, working and in good condition. You will find the warranty period in the product features table. |
Email contact@auto24parts.com if you would like to confirm that the numbers match.
