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 Passat 1.8 Bosch 8D0906018G 0261206044
Vendors's code: 0261206044
Product code: 0261206044
Barcode:
Code 39:
ISBN:
€142.28
Price
€142.28
€175.00
Price
€175.00
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Engine Control Unit Volkswagen Passat 1.8 Bosch 8D0906018G 0261206044
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How can I check whether the 8D0906018G module will fit my Passat?
Read the sticker on the casing of your current ECU: it should show VW number 8D0906018G and Bosch number 0261206044. We offer a used, working unit for a Volkswagen Passat with a 1.8 petrol engine.
Engine Control Unit Volkswagen Passat 1.8 Bosch 8D0906018G 0261206044
8D0906018G is Volkswagen's designation for the engine control unit from the Passat 1.8 petrol. The module was designed by Bosch, which gave it its own number, 0261206044. The ECU manages fuel injection and ignition, and when it fails the car is most often immobilised or runs in limp mode.
Numbers on the label
- 8D0906018G – Volkswagen (VW) part number
- 0261206044 – Bosch number, written on the label as 0 261 206 044
The last letter of the number – here G – indicates a specific module version. So compare the whole VW number, not just the beginning.
How to recognise an ECU fault
- no spark or injection when cranking,
- the engine goes into limp mode on its own,
- hunting idle speed,
- stored internal ECU faults.
First check the fuses, power supply and earths – a loose earth produces very similar symptoms.
Preparation for fitting
You can choose between two versions. If your workshop has programming equipment, the locked version is enough – with the data and immobiliser from the donor car, to be unlocked and adapted by the workshop. We prepare the unlocked version in-house before the parcel is sent, which usually takes 1–2 working days.
The available method (PIN / CAR PASS code, Virgin, IMMO OFF, auto programming, cloning) depends on the part number, software version and type of immobiliser, so for the 8D0906018G module we confirm it before you order. More information: ECU preparation options page.
Questions and answers
| Can I fit an ECU with a different letter at the end of the number? |
|---|
| We do not recommend it without checking with us. The letter indicates the software or hardware version, so the safest choice is a module with an identical VW number. |
| How long does it take to prepare the unlocked version? |
| Usually 1–2 working days before dispatch. Beforehand we confirm which unlocking method is possible for this unit. |
| Are 0261206044 and 8D0906018G the same ECU? |
| Yes, they are two numbers of one module: 8D0906018G is the VW number and 0261206044 is the Bosch number. |
| Is the module working and covered by a warranty? |
| Yes – the ECU is used, working and in good condition. You will find the warranty period in the product features table. |
If in doubt, write to us at contact@auto24parts.com. Give us the numbers from the casing of your current module and we will advise on the version.
