Compatibility of 55245644 with Fiat 500X MultiAir
Original, used Magneti Marelli control unit for the C635 DDCT dual-clutch gearbox. The key numbers to compare are 55245644 and CFC8TDW.01. Every unit is bench-tested before shipping.
Numbers on the label
| Label | Number (different formats) |
| Fiat number | 55245644 |
| BC code | BC.0112522.A / BC0112522A |
| Control unit type | CFC8TDW.01 / CFC8TDW01 / CFC 8TDW.01 |
| Label code | UW05F029 |
| Label code | A3M05CD5T |
| Application code | C635 DDCT CUSW |
Application
Confirmed application of this number: Fiat 500X MultiAir. The list is not closed: if your car is missing, it may still fit, and a listed model is no guarantee. What matters is that numbers 55245644 and CFC8TDW.01 match the label of your original unit – a different ending of the number means a different version. The label carries the application code: C635 DDCT CUSW.
Other versions in stock
Similar control units with different numbers – the number on your label decides: 55246930 / CFC319F.03, 51864449 / CFC328F.05, 51800536 / CFC228F.04, 55271242 / CFC328F.13, 55201376 / CFC208F.09.
Fitting
The module does not need programming. Before ordering, compare the numbers with the label of your unit.
Symptoms of a faulty gearbox control unit
- the gearbox goes into limp mode,
- no communication with the gearbox control unit in diagnostics,
- gearbox warning light or fault message,
- the gearbox will not engage a gear or stays in neutral (N).
Similar symptoms can be caused by the clutch or gear-shift actuator, so a gearbox diagnosis before buying is worthwhile.
Warranty and contact
The control unit comes with a 6-month warranty. More control units: Fiat Transmission Control Units (TCU). Question about a number? Contact us.
Frequently asked questions about control unit 55245644
| Question |
Answer |
| How do I check whether the unit fits my car? |
Compare numbers 55245644 and CFC8TDW.01 with the label of your unit – they must match, including the ending. |
| Does the module need programming? |
No, the module does not need programming. |
| Which cars does this control unit fit? |
Confirmed application: Fiat 500X MultiAir. The label number has the final say. |
| Is this a dual-clutch gearbox control unit? |
Yes – the C635 DDCT is an electronically controlled 6-speed gearbox with two clutches. It is not a torque-converter automatic. |