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 03F906070FB 5WP44777
Vendors's code: 5WP44777
Product code: 03F906070FB
Barcode:
Code 39:
ISBN:
$184.42
Price
$184.42
$226.84
Price
$226.84
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 03F906070FB 5WP44777
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$30.24
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shipping
(Poland)
from
$30.24
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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
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Looking for a 03F906070FB ECU for a petrol Volkswagen?
This unit has the VW number 03F906070FB and the number 5WP44777, and it runs a petrol engine. It is used, in working order and available in a locked or unlocked version.
Engine Control Unit Volkswagen 03F906070FB 5WP44777
The pair of letters FB at the end of the VW number is what sets this unit apart from other 03F906070 ECUs. The unit numbered 03F906070FB comes from a petrol-engined Volkswagen, and the second marking on its casing is 5WP44777. It controls fuel injection and ignition using sensor signals. Condition: used, working, good.
Numbers worth comparing
- 03F906070FB – Volkswagen part number (format 03F 906 070, ending FB)
- 5WP44777 – 5WP… number (Siemens VDO / Continental numbering)
Check that your unit has exactly the same FB ending. Other letters in this position mean different software or hardware.
When could the ECU be causing problems?
- the engine starts with a delay or not at all,
- loss of power and limp mode with no sensor fault,
- injector or ignition coil control faults,
- no communication with the unit after water ingress or a voltage surge.
Before you order a replacement, check the unit's plug and earth leads – they are the most common source of apparent failures.
Which version should you order?
The locked version suits a workshop with its own equipment: the unit has the previous car's data and immobiliser, and you carry out the unlocking, programming and matching yourself. If you would prefer a ready-to-use unit, choose unlocked – we prepare it before dispatch in 1–2 working days.
Not every method (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone) will necessarily be available for the 03F906070FB ECU – it depends on the part number, software and immobiliser. Ask us before you buy. Description of the options: ECU preparation options.
Questions and answers
| Will the 03F906070FB replace another 03F906070 ECU? |
|---|
| Only one with an identical ending. Other letters mean a different version. |
| Does the unit run a petrol engine? |
| Yes, it is a petrol engine control unit. |
| What should I send before buying the unlocked version? |
| A photo of the label or the full set of numbers from your current ECU. |
| What condition is the unit in? |
| Used, in working order, in good condition. You will find the warranty period in the product features table. |
Email contact@auto24parts.com – we will tell you whether this ECU fits and which variant to choose.
