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 Golf Volkswagen Polo Audi Siemens 030906021A 5WP6002
Vendors's code: 5WP6002
Product code: 5WP6002
Barcode:
Code 39:
ISBN:
€101.63
Price
€101.63
€125.00
Price
€125.00
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 Volkswagen Polo Audi Siemens 030906021A 5WP6002
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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
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Looking for a 030906021A ECU for a Golf, Polo or Audi?
We offer a used, working Siemens engine control unit with VW number 030906021A and Siemens number 5WP6002. According to our data, it comes from a petrol Volkswagen Golf, Volkswagen Polo or an Audi.
Engine Control Unit Volkswagen Golf Volkswagen Polo Audi Siemens 030906021A 5WP6002
Siemens is the manufacturer of this ECU, and in the Volkswagen catalogue it is listed under the number 030906021A. The unit runs a petrol engine and was used in the Volkswagen Golf, the Volkswagen Polo and Audi models. The number beginning with 5WP follows the Siemens VDO / Continental numbering system, and you will find it next to the VW number.
Numbers worth comparing
- 030906021A – VW part number
- 5WP6002 – manufacturer number (Siemens)
The letter A after the number 030906021 is the version designation. ECUs with the same base and a different letter may have different software, so when buying, a match of the entire number is what counts.
How to recognise a faulty ECU?
- the car will not start and there is no spark at the plugs despite a working coil,
- engine warning light on with a module fault,
- intermittent loss of communication with the tester,
- the symptoms appeared after water ingress or a voltage surge in the electrical system.
Check the ECU power supply and earth and the condition of the plug first – it is quicker and cheaper than replacing the unit.
Locked or unlocked?
If you would like us to prepare the 030906021A unit before dispatch, choose the unlocked version (usually 1–2 working days). The locked version contains the data and immobiliser of the car it came from – it is bought by workshops that unlock, program and match ECUs themselves.
Possible methods include PIN / CAR PASS, Virgin, IMMO OFF, auto programming and cloning, but their availability depends on the part number, software and immobiliser. Please ask us before you buy. More on the ECU preparation options page.
Questions and answers
| Are 5WP6002 and 030906021A one and the same ECU? |
|---|
| Yes, 5WP6002 is the Siemens number and 030906021A is the VW part number of the same unit. |
| Which Audi does this ECU fit? |
| Our data does not include a specific Audi model. You can confirm compatibility by comparing the numbers with the label on your ECU. |
| What condition is this ECU in? |
| It is a used, working part in good condition. You will find the warranty period in the product specification table. |
Send a photo of the label to contact@auto24parts.com and we will check whether this is the right unit.
