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 Siemens 037906025J 5WP4206
Vendors's code: 5WP4206
Product code: 5WP4206
Barcode:
Code 39:
ISBN:
€162.60
Price
€162.60
€200.00
Price
€200.00
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 Golf 1.6 Siemens 037906025J 5WP4206
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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.
Looking for ECU 037906025J for a 1996 Golf 1.6?
This Siemens unit, number 5WP4206, comes from a 1996 Golf 1.6. It is used and working, and we offer it locked or unlocked – compare the numbers with your label before buying.
Engine Control Unit Volkswagen Golf 1.6 Siemens 037906025J 5WP4206
1996 and a 1.6 petrol engine – that is the Volkswagen Golf this Siemens ECU comes from. It has VW number 037906025J and manufacturer number 5WP4206. It controls injection and ignition, and we rate its condition as used, working and good.
ECU markings
- 037906025J – VW part number
- 5WP4206 – Siemens number
- 1996 – year of manufacture of the car the unit comes from
The letter J at the end of the VW number indicates the software and hardware version, so compare it with the label on your unit. The year of manufacture is only a guide – matching is decided by the numbers.
ECU failure symptoms
- no start despite working ignition and fuel,
- the engine stalls once warm with no other visible cause,
- the engine warning light is on and an ECU fault is stored in the memory,
- no communication with the diagnostic tool.
In older cars, corroded contacts are a frequent culprit – inspect them before replacing the unit.
Locked and unlocked versions
We will prepare ECU 037906025J before dispatch if you choose the unlocked version – this usually takes us 1–2 working days. In the locked version we ship it with the data and immobiliser of the previous car; this is intended for workshops that will unlock, program and match the unit themselves.
Please note that the available methods – PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone – vary depending on the part number, software and immobiliser. Ask before you buy what can be done in your case. More: engine control unit variants page.
Questions and answers
| Does a unit from a 1996 Golf fit a different model year? |
|---|
| The model year does not determine compatibility. Compare the numbers 037906025J and 5WP4206 with the label on your ECU. |
| Does the locked version need programming? |
| Yes. It has to be unlocked, programmed and matched to the car's immobiliser. |
| What condition is this unit in? |
| It is a used part, working and in good condition. You will find the warranty period in the product features table. |
Have an older Golf and not sure which ECU to choose? Email contact@auto24parts.com.
