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 1.6 Magneti Marelli IAW 4LVH 036906034BB
Vendors's code: 036906034BB
Product code: 036906034BB
Barcode:
Code 39:
ISBN:
406,50 zł
Price
406,50 zł
500,00 zł
Price
500,00 zł
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 1.6 Magneti Marelli IAW 4LVH 036906034BB
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(Poland)
from
120,00 zł
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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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Where should I look for the number 036906034BB on a Golf 1.6 ECU?
VW number 036906034BB is printed on the label on the unit casing, next to the IAW 4LVH marking. This used, working Magneti Marelli ECU comes from a Golf with a 1.6 petrol engine.
Engine Control Unit Volkswagen Golf 1.6 Magneti Marelli IAW 4LVH 036906034BB
The IAW 4LVH marking on the casing tells you that this is a Magneti Marelli ECU, and VW number 036906034BB tells you which version was fitted to the Golf with the 1.6 petrol engine. The unit sets the fuel quantity and ignition timing based on the sensors. When it stops working, the engine may not start or may run in limp mode.
How to identify this ECU
- 036906034BB – VW part number, the basis for matching
- IAW 4LVH – Magneti Marelli ECU type
The letters BB at the end indicate a specific version – 036906034 ECUs with other letters have different software or hardware. So check that your unit has exactly this number.
Symptoms of a faulty ECU
- no start with a good battery and a working fuel pump,
- engine warning light on with an ECU memory or processor fault,
- the engine hesitates when you press the accelerator,
- no connection to the unit during diagnostics.
First rule out a fault in the crankshaft position sensor and the power supply circuit – they produce symptoms deceptively similar to an ECU failure.
How we will supply this ECU
You can choose between a locked and an unlocked version. The locked unit holds the data and immobiliser of the previous car in its memory and is intended for workshops that will take care of the unlocking, programming and matching themselves.
We prepare the unlocked version before dispatch, usually within 1–2 working days. Please bear in mind that not every method – PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone – is possible for every ECU; it depends on the part number, software and immobiliser. Please ask before you buy. Details: ECU preparation options.
Questions and answers
| My ECU has a different manufacturer number – is that a problem? |
|---|
| The basis for matching is VW number 036906034BB. If in doubt, send us a photo of the label and we will check the other markings. |
| Will the locked version start the engine? |
| Not straight away – it has to be programmed and matched to the car's immobiliser. |
| What about condition and warranty? |
| The ECU is used, working and in good condition. You will find the warranty period in the product specification table. |
Send the numbers from the label to contact@auto24parts.com – we will confirm compatibility.
