The automatic transmission control unit (often designated as TCU or TCM) is a crucial electronic component responsible for smooth and trouble-free gear shifting. Its failure, most often caused by overheating, short circuits, or water damage, results in jerking, an inability to shift gears, or the vehicle entering limp mode. Purchasing a new module at an authorized dealership is a massive expense, which is why replacing it with a fully functional, used original is the most reasonable solution.
Engine Control Unit Volkswagen Passat, Volkswagen Golf, Volkswagen Jetta, Audi 3C0907427
Vendors's code: 3C0907427
Product code: 3C0907427
Barcode:
Code 39:
ISBN:
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 Passat, Volkswagen Golf, Volkswagen Jetta, Audi 3C0907427
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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
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.
Will the 3C0907427 ECU fit your Passat, Golf or Jetta?
It will if the label on your current unit shows the same number, 3C0907427 – the car model alone is not enough. This unit, with the second marking AU70005381Y, comes from a Volkswagen (Passat, Golf, Jetta) or Audi and is used and in working order.
Engine Control Unit Volkswagen Passat, Volkswagen Golf, Volkswagen Jetta, Audi 3C0907427
Volkswagen Passat, Golf and Jetta, as well as Audi – these are the cars in which you will find the unit numbered 3C0907427. We do not state the engine size or type here, because only matching part numbers decide whether it fits. The ECU is used, in working order and in good condition, and alongside the VW number its casing carries a second number: AU70005381Y.
Numbers on the label
- 3C0907427 – Volkswagen part number (VW number)
- AU70005381Y – additional marking on the same unit
Compare both strings of characters with the sticker on your own ECU. If the VW number on your unit ends with an extra letter, it is a different software or hardware version – such a unit is not a 1:1 replacement.
When to suspect an ECU fault?
- the car will not start even though the battery and starter motor are fine,
- the diagnostic tester cannot connect to the unit,
- warning lights come on on the dashboard for no obvious reason,
- the problem appeared after water ingress, a voltage surge or a failed programming attempt.
Check the fuses, earth connections and wiring loom connectors first – damage to these can cause exactly the same symptoms.
Locked or unlocked – which to choose?
The locked version reaches you with the data and immobiliser of the previous car. It is chosen by workshops that will unlock, program and match the unit themselves. We prepare the unlocked version before dispatch – this usually takes 1–2 working days.
The preparation method (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone) depends on the part number, software and immobiliser, so not every method is possible for the 3C0907427 ECU – ask us before you buy. We describe the details on the ECU preparation options page.
Questions and answers
| Are AU70005381Y and 3C0907427 the same unit? |
|---|
| Yes, both markings appear on this one unit. Use both when comparing. |
| Does this ECU fit Audi? |
| Audi is among the cars that units with this number come from. What decides, however, is whether the number matches the label on your ECU. |
| How long does it take to prepare the unlocked version? |
| Usually 1–2 working days before dispatch, once the method has been confirmed. |
| What condition is the ECU in? |
| Used, in working order, in good condition. You will find the warranty period in the product features table. |
Not sure about the number? Send a photo of the label to contact@auto24parts.com – we will compare the markings before you order.
