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 4MVF 036906034BH
Vendors's code: 036906034BH
Product code: 3A42-28740
Barcode:
Code 39:
ISBN:
325,20 zł
Price
325,20 zł
400,00 zł
Price
400,00 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 4MVF 036906034BH
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Shipping
from
120,00 zł
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shipping
(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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How can I make sure the IAW 4MVF 036906034BH ECU will fit?
Compare VW number 036906034BH with the label on your ECU – it must match down to the last letter. This used, working Magneti Marelli unit comes from a Golf with a 1.6 petrol engine and is available in three versions.
Engine Control Unit Volkswagen Golf 1.6 Magneti Marelli IAW 4MVF 036906034BH
This Magneti Marelli ECU from the IAW 4MVF family has VW number 036906034BH and was fitted to a Golf with a 1.6 petrol engine. What sets it apart is the availability of three versions, including IMMO OFF. The unit controls fuel injection, ignition and the throttle, and if it fails, the result is most often a no-start.
Number to compare
- 036906034BH – VW part number
- IAW 4MVF – Magneti Marelli ECU family
The final letters of the number, here BH, denote the software or hardware version. 036906034 units with other letters will not necessarily work with your engine.
Possible failure symptoms
- no start even though the starter is cranking,
- the engine runs rough and loses power,
- engine warning light with an internal module fault,
- no communication with the diagnostic tool.
First check the ECU power supply and the crankshaft and camshaft position sensors – their failures look similar.
Three versions: locked, unlocked, IMMO OFF
The locked version holds the data and immobiliser of the previous car – it is bought by workshops that will unlock, program and match the ECU themselves. We will prepare the unlocked version before dispatch, usually within 1–2 working days.
The third option is IMMO OFF: an ECU prepared before dispatch with the immobiliser function disabled in the software. Before you buy, we will confirm whether this solution suits your car. Please also bear in mind that not every method (PIN / CAR PASS, Virgin, auto programming, clone) is possible for every ECU – it depends on the part number, software and immobiliser. Description: ECU preparation options.
Questions and answers
| What does the IMMO OFF version involve? |
|---|
| The ECU has the immobiliser function disabled in the software. Before you buy, we confirm whether this solution suits your Golf. |
| Which version should I choose for programming it myself? |
| The locked version – it is intended for workshops that unlock and match ECUs themselves. |
| What condition is the unit in? |
| Used, working, in good condition. You will find the warranty period in the product specification table. |
Not sure which version to choose? Email us at contact@auto24parts.com.
