A properly functioning ABS system is the foundation of road safety. Its main task is to prevent wheel lock-up during emergency braking, which allows the driver to maintain full control of the vehicle. The heart of this system is the electronic ABS pump controller. When it fails, the system stops working. A proper diagnosis of the problem allows you to avoid unnecessary costs and quickly restore brake efficiency.
Engine Control Unit Citroën Magneti Marelli IAW 48P2.31 9648636580 9644955480
Vendors's code: IAW48P231
Product code: 9648636580
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
Ask about the product
Engine Control Unit Citroën Magneti Marelli IAW 48P2.31 9648636580 9644955480
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What do the numbers 9648636580 and 9644955480 on this ECU mean?
9648636580 is the PSA software number and 9644955480 the hardware number, both printed on the white Magneti Marelli sticker next to the IAW 48P2.31 type marking. This used, working engine control unit comes from a Citroën and is matched by these numbers rather than by car model.
Citroën engine control unit 9648636580 – Magneti Marelli IAW 48P2.31
If your Citroën will not start or shows injection faults that point to the ECU, the label on the unit is the place to start. This Magneti Marelli IAW 48P2.31 is a petrol engine control unit from the IAW 48P2 family used in PSA group cars. It reads the engine sensors and controls fuel injection and ignition. The sticker carries three numbers: Citroën software, hardware version and Marelli's own part number.
Numbers on the sticker
- 9648636580 – PSA software number (SW) – the main number for matching
- 9644955480 – PSA hardware number (HW)
- 16588004 – Magneti Marelli number, printed as 16.588.004
- IAW 48P2.31 – Magneti Marelli ECU type
PSA often pairs the same hardware (HW 9644955480) with different software, so the SW number is the one that must match. If your unit shows a different SW number, ask us before ordering.
When could the ECU be the cause?
Typical signs of a failing engine control unit include:
- the engine does not start although the battery and starter are fine,
- no communication with the ECU through the diagnostic socket,
- engine warning light with injection or ignition circuit fault codes,
- rough running that persists after the sensors have been replaced.
Before replacing the unit, check the fuses, earth leads and connectors – corroded pins can produce exactly the same symptoms. A used PSA engine control unit normally has to be matched to the car's immobiliser, and it may also need programming with a diagnostic tool or a data transfer from the old ECU.
Questions about this ECU
| What is the difference between 9648636580 and 9644955480? |
|---|
| 9648636580 is the software number (SW) and 9644955480 the hardware number (HW). The SW number matters most when matching a replacement. |
| Which Citroën does this ECU fit? |
| We match it by the sticker numbers, not by model. If your unit shows SW 9648636580 and HW 9644955480, this one is its equivalent. |
| Will the car start straight after fitting? |
| Usually not – the ECU has to be matched to the immobiliser (BSI) with a diagnostic tool, or the data from the old unit has to be transferred. |
| What condition is the ECU in? |
| This ECU is used, has been tested and works correctly. Warranty details are listed in the product specifications. |
Different SW number, or not sure where to find it? Send us a photo of the sticker on your ECU and we will check whether this unit will fit.
