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 1.6 Siemens 3B0907557C 5WP433204
Vendors's code: 5WP433204
Product code: 3B0907557C
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
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Engine Control Unit Volkswagen Passat 1.6 Siemens 3B0907557C 5WP433204
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How does the 3B0907557C ECU differ from the version without a letter?
The letter C indicates a different software or hardware version from the 3B0907557 module without a letter – the Siemens number (5WP4332 04) is different too. This is a used, working engine control unit for a petrol Volkswagen Passat 1.6.
Engine Control Unit Volkswagen Passat 1.6 Siemens 3B0907557C 5WP433204
Version C of the 3B0907557 ECU is a Siemens module numbered 5WP433204. It was used in the Volkswagen Passat with a 1.6 petrol engine, where it controls fuel delivery and ignition based on signals from the sensors. You can tell it apart from other 3B0907557 variants by the letter and the Siemens number.
Numbers on the label
- 3B0907557C – VW part number, version C
- 5WP433204 – Siemens number, written on the label as 5WP4332 04
Order this module if your ECU shows exactly 3B0907557C. If the letter is different, ask us whether a swap is possible.
When to suspect the ECU
- no spark and no injection with working sensors,
- fluctuating revs that new spark plugs and leads do not cure,
- an internal module fault stored in memory,
- the tester cannot see the engine ECU.
First check the voltage at the connector and the condition of the earths – corroded connections produce very similar symptoms. It is also worth reading the fault memory: sensor faults with a working module usually point to the wiring loom, not to the ECU electronics.
Choosing the ECU version
We offer the 3B0907557C module locked or unlocked. The locked one contains the data and immobiliser of the car it came from and needs unlocking, programming and adaptation in a workshop. We prepare the unlocked one before dispatch – normally within 1–2 working days.
Which method is available – PIN / CAR PASS, Virgin, IMMO OFF, auto programming or clone – depends on the number, software and immobiliser. Please ask before ordering. Full description on the ECU preparation options page.
Questions and answers
| Are 5WP4332 04 and 5WP433204 the same number? |
|---|
| Yes, on the label the Siemens number is split by a space. |
| Does this ECU fit a Passat 1.6? |
| According to our data, yes, if the VW number on your module is 3B0907557C. |
| What condition is the module in? |
| It is a used part, working and in good condition. You will find the warranty period in the product features table. |
Email contact@auto24parts.com and we will check the numbers from your label.
