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, Audi, Seat, Skoda Magneti Marelli IAW 4LU.RA 036906034BA 6160054301
Vendors's code: 6160054301
Product code: IAW4LURA
Barcode:
Code 39:
ISBN:
€121.95
Price
€121.95
€150.00
Price
€150.00
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Engine Control Unit Volkswagen, Audi, Seat, Skoda Magneti Marelli IAW 4LU.RA 036906034BA 6160054301
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How does the 036906034BA ECU differ from other 036906034 versions?
By its BA suffix and Magneti Marelli number 61600.543.01 – this is the IAW 4LU.RA version, different from, for example, 036906034E or 036906034KA. The unit is used, in working order and fits Volkswagen Group petrol vehicles with this number.
Engine Control Unit Volkswagen, Audi, Seat, Skoda Magneti Marelli IAW 4LU.RA 036906034BA 6160054301
The 036906034 number range covers many Magneti Marelli ECUs, and this unit is the BA version from the IAW 4LU.RA family. According to the data, it was used in Volkswagen, Audi, Seat and Skoda vehicles with petrol engines. The ECU controls injection, ignition and idle speed, and stores fault codes. The manufacturer number is 6160054301. The 036906034BA is easily confused with neighbouring versions because the casings look similar – so always compare the label before buying. When the unit fails, the vehicle usually won't start or runs in limp mode.
Numbers to verify
- 036906034BA – VW part number
- 6160054301 – Magneti Marelli number, shown on the label as 61600.543.01
- IAW 4LU.RA – ECU family
The 61600.xxx.xx format is Magneti Marelli numbering. For a replacement, choose a unit with an identical VW number, including the BA suffix – that is what identifies the software matched to a specific engine and specification.
Symptoms of a faulty unit
- no injection or spark when cranking,
- stalling when coming to a stop at traffic lights,
- sensor faults that keep coming back after replacement,
- no communication with the diagnostic tester.
Before deciding to replace it, inspect the ECU connector and the engine earth leads.
Locked and unlocked – how they differ
An unlocked unit is prepared before dispatch, usually within 1–2 working days. A locked one retains the data and immobiliser of the previous vehicle and is intended for workshops that unlock, program and match it themselves.
Whether PIN / CAR PASS, Virgin, IMMO OFF, auto programming or cloning can be used depends on the part number, software and immobiliser. Please ask before buying. More: ECU preparation options.
Questions and answers
| Will 036906034BA replace a version with a different letter? |
|---|
| Not without checking – different letters usually mean different software. |
| Will the locked version start the engine straight away? |
| No, it needs to be programmed and matched to the immobiliser. |
| What condition is the ECU in? |
| It is a used part, in working order and in good condition. You will find the warranty period in the product features table. |
Send your unit's numbers to contact@auto24parts.com – we'll confirm the match.
