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 Skoda Octavia 1.6 TDI 03L906023NF 5WP42927AA
Vendors's code: 5WP42927AA
Product code: 5WP42927AA
Barcode:
Code 39:
ISBN:
€487.80
Price
€487.80
€600.00
Price
€600.00
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 Skoda Octavia 1.6 TDI 03L906023NF 5WP42927AA
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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 03L906023NF unit fit an Octavia 1.6 TDI?
Yes, if your current ECU has the same VW number – 03L906023NF – and the manufacturer number 5WP42927AA. This unit comes from an Octavia with the 1.6 TDI engine; it is used and fully working.
Engine Control Unit Skoda Octavia 1.6 TDI 03L906023NF 5WP42927AA
The 1.6 TDI engine in the Octavia will not run without a working engine control unit. The 03L906023NF unit receives sensor signals, controls injection and turbo boost, and checks immobiliser authorisation when the engine is started. The casing also carries the ECU manufacturer number: 5WP42927AA. A faulty unit can immobilise the car even when all the other components are working.
Numbers to compare
- 03L906023NF – VW/Skoda part number,
- 5WP42927AA – ECU manufacturer number, shown on the label as 5WP42927 AA.
The last letters of the VW number (here NF) indicate the software or hardware version. That is why a 03L906023 ECU with a different suffix will not always be a replacement.
Symptoms worth knowing
- the engine cannot be started,
- rough running and jerking with no injector fault,
- engine warning light on and an ECU fault message,
- the unit does not respond during diagnostics.
Before you buy another unit, rule out corrosion on the connector pins and damaged earth leads.
Unlocking and programming
We offer this ECU in a locked version – with the donor car's data and immobiliser intact – for workshops that carry out the unlocking, programming and matching themselves. The other option is the unlocked version: we will prepare it before dispatch, usually within 1–2 working days.
We choose the preparation method on a case-by-case basis. PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning – not every one of these methods will be available, as it depends on the part number, software and immobiliser. Ask us before buying. Description of the options: ECU preparation options.
Questions and answers
| Where are the numbers 03L906023NF and 5WP42927AA? |
|---|
| On the label on the ECU casing. The manufacturer number is written there as 5WP42927 AA. |
| What should I choose if I do not have programming tools? |
| The unlocked version. Before ordering, ask which preparation method is possible for this unit. |
| What condition is the ECU in? |
| Used, fully working and in good condition. You will find the warranty period in the product specification table. |
For help choosing the right part, email contact@auto24parts.com.
