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 1.4 Magneti Marelli IAW 4AV.V9 036906014AL
Vendors's code: 036906014AL
Product code: IAW4AV.V9
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
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, Seat 1.4 Magneti Marelli IAW 4AV.V9 036906014AL
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(Poland)
from
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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 on the ECU casing is the number 036906014AL?
Look for it on the unit's label – next to the VW number you will find the type designation IAW 4AV.V9. This used Magneti Marelli ECU in working order comes from a 1.4 petrol engine used in Volkswagen and Seat models.
Engine Control Unit Volkswagen, Seat 1.4 Magneti Marelli IAW 4AV.V9 036906014AL
The Magneti Marelli IAW 4AV.V9 is a petrol engine ECU which, in Volkswagen and Seat vehicles, works with the 1.4 engine. The unit, VW number 036906014AL, manages injection, ignition and idle speed. When it stops working, the engine usually won't start or runs roughly.
Part numbers
- 036906014AL – VW part number
- IAW 4AV.V9 – Magneti Marelli ECU type designation
We do not give a separate Marelli number for this unit, so match it by the VW number. The AL suffix identifies a specific version – a unit with a different letter may have different software.
Symptoms that may point to the ECU
- the engine starts briefly and then dies,
- no connection to diagnostics despite a working OBD socket,
- incorrect control of the ignition coils or injectors,
- the engine shutting down by itself while driving.
Before replacing it, measure the power supply and the continuity of the wires between the ECU and the components.
ECU option
We offer two options. The first is an unlocked ECU – prepared by us before dispatch (usually 1–2 working days). The second is a locked ECU, with the data and immobiliser of the previous car, for workshops that carry out unlocking, programming and matching themselves.
The possible unlocking method – PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning – is determined case by case, as it depends on the part number, software and immobiliser. For the 036906014AL we will confirm it before you buy. See also: ECU preparation options.
Questions and answers
| What does IAW 4AV.V9 mean? |
|---|
| It is the Magneti Marelli ECU type designation. It helps identify the unit family, but the full number 036906014AL remains the most important thing when matching. |
| Will the 036906014AL start the engine straight after fitting? |
| Not in the locked version – it needs to be programmed and matched to the immobiliser. With the unlocked version, it depends on the preparation method, which we agree before dispatch. |
| Is there a warranty on the ECU? |
| Yes. You will find the warranty period in the product features table. The unit is used, in working order and in good condition. |
Send any questions about the numbers or ECU preparation to contact@auto24parts.com.
