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 Bosch MED17.5 06J906026EJ 0261S05556
Vendors's code: 0261S05556
Product code: 0261S05556
Barcode:
Code 39:
ISBN:
£370.74
Price
£370.74
£456.01
Price
£456.01
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 Bosch MED17.5 06J906026EJ 0261S05556
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from
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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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Where on the casing can you find the number 06J906026EJ?
On the ECU sticker, next to the Bosch number written as 0 261 S05 556. If both numbers on your unit match these, this used Bosch MED17.5 is its equivalent.
Engine Control Unit Volkswagen Bosch MED17.5 06J906026EJ 0261S05556
The ECU with the VW number 06J906026EJ is a Bosch MED17.5, i.e. a Motronic unit for a direct-injection petrol engine. It differs from other 06J906026 versions in its EJ ending and the Bosch number 0261S05556. This unit is used, in working order and in good condition.
Numbers to compare
- 06J906026EJ – VW number
- 0261S05556 – Bosch number (on the sticker: 0 261 S05 556)
- MED17.5 – Bosch Motronic family
The letters EJ denote the hardware or software version. An ECU without this ending or with a different one will not automatically be a replacement.
Symptoms that point to the ECU
- the engine cranks but will not start – no spark or injection even though the coils and injectors are fine,
- limp mode with reduced power that the sensor readings do not explain,
- fuel pressure control faults even though the high-pressure pump and sensor are fine,
- the fuel pump or radiator fan is not switched on, although the components themselves work.
Start by inspecting the wiring loom and connector pins; a chafed wire often mimics an ECU failure.
Which to choose: the locked or unlocked version?
The locked version of the 06J906026EJ ECU is the choice for a workshop – the unit has the previous vehicle's data and immobiliser stored, and the unlocking, programming and matching are done by the mechanic. We prepare the unlocked one before dispatch; this normally takes 1–2 working days.
Not every method can be used with every ECU: PIN / CAR PASS, Virgin, IMMO OFF, auto programming and clone depend on the part number, software and immobiliser. Ask about the available options before you order. Full description: ECU preparation and variants.
Questions and answers
| What needs to be done after fitting this unit? |
|---|
| With the locked version: unlock it, program it and match it to the immobiliser. With the unlocked one, the scope of work depends on the preparation method, which we confirm before purchase. |
| What should I prepare before contacting you about unlocking? |
| Write down all the numbers from the sticker on the old unit or take a photo of it – this is the basis for checking the possible methods. |
| Do 0261S05556 and 06J906026EJ refer to the same ECU? |
| Yes. 0261S05556 is the number assigned by Bosch, and 06J906026EJ is the Volkswagen part number – both describe the same unit. |
| What condition is the unit in and does it have a warranty? |
| The unit is used, in working order and in good condition. You will find the warranty period in the product features table. |
If you have any doubts about the number, email contact@auto24parts.com.
