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 Polo 1.6 GTI Siemens 036906033 5WP4330702
Vendors's code: 5WP4330702
Product code: 5WP43307
Barcode:
Code 39:
ISBN:
1 300,81 zł
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1 300,81 zł
1 600,00 zł
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1 600,00 zł
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Engine Control Unit Volkswagen Polo 1.6 GTI Siemens 036906033 5WP4330702
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from
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(Poland)
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How can I check whether the 036906033 ECU is right for my Polo GTI?
Compare the sticker: VW number 036906033 (with no letter at the end) and Siemens number 5WP43307 02. This used, working module comes from a Volkswagen Polo 1.6 GTI with a petrol engine.
Engine Control Unit Volkswagen Polo 1.6 GTI Siemens 036906033 5WP4330702
The Volkswagen Polo 1.6 GTI with a petrol engine uses a Siemens engine ECU with VW number 036906033. On the Siemens label you will find 5WP43307 02, which is the number 5WP4330702. The module is responsible for fuel injection and ignition, so any fault in it quickly shows in the engine's performance and running.
Numbers on the label
- 036906033 – Volkswagen (VW) part number
- 5WP4330702 – Siemens number, written on the label as 5WP43307 02
This VW number has no letter at the end, which makes it all the more important to compare the Siemens number as well, including the 02 ending – it indicates the module version.
When might the ECU be faulty?
- 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 036906033 module we confirm it before you order. More information: ECU preparation options page.
Questions and answers
| Can a workshop handle the locked version? |
|---|
| Yes, if it has equipment for programming and immobiliser adaptation. Without such equipment, it is better to choose the unlocked version. |
| Will the engine start straight away after fitting the 036906033? |
| Not with the locked version – the ECU must be programmed and adapted to the immobiliser. With the unlocked version it depends on the preparation method we agree before dispatch. |
| 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. |
| Is there a warranty on the ECU? |
| Yes. We sell it used, working and in good condition. You will find the warranty period in the product features table. |
Want to confirm compatibility before ordering? Send a photo of the label to contact@auto24parts.com.
