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 06A906019 5WP439503
Vendors's code: 5WP439503
Product code: 06A906019
Barcode:
Code 39:
ISBN:
€203.25
Price
€203.25
€250.00
Price
€250.00
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 06A906019 5WP439503
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Shipping
from
€30.00
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shipping
(Poland)
from
€30.00
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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 check whether the 06A906019 ECU will fit my Golf 1.6?
Check that the label on your unit shows VW number 06A906019 with no additional letter and Siemens number 5WP439503. If so, you can order this used, working ECU – locked or unlocked.
Engine Control Unit Volkswagen Golf 1.6 Siemens 06A906019 5WP439503
The VW number of this ECU – 06A906019 – has no letter at the end, which is worth checking when comparing. The unit was made by Siemens and given the number 5WP439503. It comes from a Volkswagen Golf with a 1.6 petrol engine, where it controlled fuel injection and ignition; it is used, working and in good condition.
Numbers to compare
- 06A906019 – VW part number, with no letter at the end
- 5WP439503 – Siemens number
In this family of VW numbers, the letter at the end denotes the software and hardware version. This unit has a number without a letter, so an ECU with an added letter is a different version.
Symptoms of a faulty 1.6 ECU
- the engine will not start despite a spark and fuel pressure,
- unstable idle speed with no sensor fault,
- the ECU does not respond to the diagnostic tester,
- internal module faults are stored in memory.
Start by checking the power supply and earths – it is the cheapest step in diagnosis.
Locked or unlocked – how does it work?
A locked ECU holds the data and immobiliser of the previous car in its memory. This type of unit is bought by workshops that will unlock, program and match it to the Golf themselves. We prepare an unlocked ECU in-house before dispatch – this usually takes 1–2 working days.
The preparation method depends on the part number, software and immobiliser. PIN / CAR PASS, Virgin, IMMO OFF, auto programming or a clone may be possible, but not every option is available for 06A906019 – please ask before you buy. Details: ECU preparation options.
Questions and answers
| My ECU has the number 06A906019 followed by a letter – will this one fit? |
|---|
| The letter denotes a different version, so do not assume compatibility. Send us a photo of the label. |
| Is 5WP439503 the Siemens number? |
| Yes, it is the manufacturer's (Siemens) number assigned to this unit. |
| What condition is the unit in? |
| It is a used, working part in good condition. You will find the warranty period in the product specification table. |
Not sure when comparing the numbers? Email us at contact@auto24parts.com.
