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 1.4 Magneti Marelli IAW 4LV.M 036906034AG
Vendors's code: 036906034AG
Product code: IAW4LV.M
Barcode:
Code 39:
ISBN:
€182.93
Price
€182.93
€225.00
Price
€225.00
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 1.4 Magneti Marelli IAW 4LV.M 036906034AG
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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
The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
Does the IAW 4LV.M 036906034AG ECU fit a Volkswagen 1.4?
This Magneti Marelli unit comes from a Volkswagen with the 1.4 petrol engine. It fits if your ECU has the same VW number, 036906034AG, and the designation IAW 4LV.M.
Engine Control Unit Volkswagen 1.4 Magneti Marelli IAW 4LV.M 036906034AG
Magneti Marelli IAW 4LV.M – this is the family to which this ECU for the Volkswagen 1.4 petrol engine belongs. The VW part number 036906034AG has the 0xx 906 0xx format typical of engine control units. The unit manages fuel injection and ignition based on sensor signals. It is used, in working order and in good condition.
Numbers and markings to check
- 036906034AG – Volkswagen part number, ending AG
- IAW 4LV.M – Magneti Marelli ECU type
- 1.4 – the petrol engine the unit comes from
Various ECUs were used with 1.4 engines, so the VW number decides, not the engine size alone. The letters AG define the software or hardware version, so a 036906034 ECU with a different ending is not a guaranteed replacement.
Symptoms of a faulty IAW 4LV.M ECU
- the engine will not start, although there is fuel and the starter motor cranks,
- hunting revs and stalling when stationary,
- misfires even though the spark plugs and coil are fine,
- no communication with the unit.
Before replacing it, check the connector, earths and power supply – corroded contacts are a common cause of faults. It is also worth reading the fault memory before you decide to buy a new unit.
Locked or unlocked?
We offer the 036906034AG ECU unlocked – prepared before dispatch, usually in 1–2 working days – or locked, with the data and immobiliser of the previous car. The latter variant is chosen by workshops that will unlock, program and match it themselves.
The possible methods (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone) depend on the part number, software and immobiliser, so ask before you buy. Description: ECU preparation options.
Questions and answers
| Is every Volkswagen 1.4 ECU interchangeable? |
|---|
| No, match it by the number 036906034AG. |
| Who is the manufacturer? |
| Magneti Marelli, IAW 4LV.M family. |
| How long does it take to prepare the unlocked version? |
| Usually 1–2 working days. |
| What condition is it in? |
| Used, in working order, in good condition. You will find the warranty period in the product features table. |
Send any questions about this unit to contact@auto24parts.com.
