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 Skoda Octavia 1.8 TSI CDAB Bosch MED17.5 3T0907115F 0261S05743 1Z0907115F
Vendors's code: 0261S05743
Product code: 3T0907115F
Barcode:
Code 39:
ISBN:
€243.90
Price
€243.90
€300.00
Price
€300.00
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 1.8 TSI CDAB Bosch MED17.5 3T0907115F 0261S05743 1Z0907115F
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Looking for a 3T0907115F ECU for an Octavia 1.8 TSI CDAB?
This is a used, fully working Bosch MED17.5 unit, Bosch number 0 261 S05 743, with a second VW number, 1Z0907115F. Available locked for garages or unlocked by us before dispatch.
Engine Control Unit Skoda Octavia 1.8 TSI CDAB Bosch MED17.5 3T0907115F 0261S05743 1Z0907115F
Engine code CDAB here denotes the 1.8 TSI petrol engine in the Skoda Octavia. It is managed by a Bosch MED17.5 ECU, number 3T0907115F – a unit from the Motronic family for direct-injection engines. The casing also carries a second VW number, 1Z0907115F. The unit is used, fully working and in good condition.
Numbers from the sticker
- 3T0907115F – VW/Skoda part number
- 1Z0907115F – additional VW number on the same unit
- 0261S05743 – Bosch number, as shown on the label: 0 261 S05 743
- CDAB – 1.8 TSI engine code
Both VW numbers end in the letter "F", which indicates the version. If your unit has the same letter and a matching Bosch number, you can treat 3T0907115F as the correct replacement.
How a fault shows itself
- the engine warning light and a communication fault with the unit,
- rough running and misfires even though the coils are fine,
- no response from the engine when you try to start it,
- reduced power after a voltage surge or a failed programming attempt.
The first step is to check the power supply and earths – only then diagnose the ECU itself.
Unlocked or locked ECU?
The answer depends on who is fitting the unit. A garage with its own programming equipment usually chooses the locked version – with the data and immobiliser of the previous car – and unlocks, programs and adapts it itself. If you would like us to do this, choose the unlocked version; preparation before dispatch usually takes 1–2 working days.
PIN / CAR PASS, Virgin, IMMO OFF, auto-programming or clone are not always an option – it depends on the part number, software and immobiliser. Please ask before you buy. More on the engine control unit variants page.
Questions and answers
| Does the 3T0907115F ECU fit the CDAB engine? |
|---|
| This unit comes from an Octavia 1.8 TSI CDAB. Ultimately, what decides is whether the numbers match the label on your unit. |
| Why are there two VW numbers on the unit? |
| The ECU is marked with the numbers 3T0907115F and 1Z0907115F – both refer to the same part. |
| What condition is the unit in? |
| Used, fully working, in good condition. You will find the warranty period in the product specifications table. |
Email contact@auto24parts.com with the numbers from your ECU – we will check the available variants.
