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 03E906033AK 5WP4423603
Vendors's code: 5WP4423603
Product code: 03E906033AK
Barcode:
Code 39:
ISBN:
€203.25
Price
€203.25
€250.00
Price
€250.00
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 03E906033AK 5WP4423603
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€30.00
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shipping
(Poland)
from
€30.00
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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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How does the 03E906033AK ECU differ from the 03E906033D?
Both share the same VW number prefix but have different endings (AK and D) and different 5WP numbers – they are different versions of the unit. This used, working unit is the 03E906033AK with the number 5WP4423603.
Engine Control Unit Volkswagen 03E906033AK 5WP4423603
The AK ending distinguishes this unit from other ECUs in the 03E906033 number family. Its label shows the VW number 03E906033AK and the number 5WP44236 03, and it works in a petrol-engined Volkswagen. It is responsible for injection and ignition. The unit is used, in working order and in good condition.
Numbers to check
- 03E906033AK – VW part number
- 5WP4423603 – 5WP… number (Siemens VDO / Continental numbering), written on the label as 5WP44236 03
Match the ECU by the full VW number including the letters AK. Versions with a different ending, e.g. D, differ in software or hardware and will not necessarily work in your car.
Signs that the unit may be faulty
- no start even though the fuel pump and ignition are fine,
- jerking and misfires not caused by any component,
- engine warning light and ECU memory faults,
- no communication with diagnostics.
Start by checking the earths and power supply – a quick test that often explains the problem.
Versions: locked and unlocked
You can buy the 03E906033AK ECU in one of two versions. If you choose locked, you get a unit with the donor car's data and immobiliser – for workshops that will unlock, program and match it themselves. We prepare the unlocked one before dispatch, usually in 1–2 working days.
The available methods (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone) depend on the part number, software and immobiliser – ask us before you buy. Details: ECU preparation options.
Questions and answers
| Can I fit the 03E906033AK instead of the 03E906033D? |
|---|
| Do not assume they are interchangeable – they are different versions. Choose a unit with the same number as in your car. |
| How is the 5WP number written on the label? |
| As 5WP44236 03 – with a space before the last two digits. |
| How long is the wait for the unlocked version? |
| Usually 1–2 working days. |
| What condition is it in? |
| Used, in working order, in good condition. You will find the warranty period in the product features table. |
Send the numbers from your ECU to contact@auto24parts.com and we will confirm compatibility.
