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 Ibiza 1.4 Magneti Marelli IAW 4HV.H 03C906024H 6160136304
Vendors's code: 6160136304
Product code: IAW4HVH
Barcode:
Code 39:
ISBN:
$124.06
Price
$124.06
$152.59
Price
$152.59
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 Ibiza 1.4 Magneti Marelli IAW 4HV.H 03C906024H 6160136304
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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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Does the 03C906024H ECU fit a Seat Ibiza 1.4?
Yes, if your current unit carries VW number 03C906024H and Marelli number 61601.363.04. This is a used IAW 4HV.H ECU in working order for the 1.4 petrol engine, used in the Ibiza and in Volkswagen models.
Engine Control Unit Volkswagen, Seat Ibiza 1.4 Magneti Marelli IAW 4HV.H 03C906024H 6160136304
The Seat Ibiza with the 1.4 petrol engine is a typical application for the Magneti Marelli IAW 4HV.H ECU with VW number 03C906024H; the unit was also fitted to Volkswagen models. Number 61601.363.04 is the designation in Magneti Marelli numbering. The ECU controls injection, ignition and idle speed, and when it fails the result is often a no-start.
Numbers to compare
- 03C906024H – VW part number
- 6160136304 – Magneti Marelli number, shown on the label as 61601.363.04
- IAW 4HV.H – ECU type
The single letter H at the end of the VW number denotes the software or hardware version. 03C906024 units with other suffixes, such as AS or AF, are separate versions – don't swap them without checking.
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.
Locked or unlocked version?
There are two versions to choose from. The locked one reaches you with the data and immobiliser of the previous vehicle – an option for workshops that unlock, program and match the unit themselves. The unlocked one is prepared before dispatch, which usually takes 1–2 working days.
The preparation method (PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning) depends on the part number, software and immobiliser – not every method is available for the 03C906024H ECU, so please ask us before buying. Description of the options: ECU preparation options.
Questions and answers
| Is the Marelli number enough for matching? |
|---|
| Not always. The same Marelli number can appear with different VW numbers, so compare both markings, including 03C906024H. |
| Is adaptation needed after replacing the ECU? |
| Usually, yes – after fitting, it is worth carrying out the matching and checking the fault memory. The scope of work depends on the version you choose; we'll advise before you buy. |
| 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. |
Questions about matching? Email contact@auto24parts.com and attach a photo of your ECU's label.
