5WS40025E-T 9646801080 – how to choose the right ECU
We offer a used Siemens SID801 ECU intended for Peugeot and Citroën with the 2.0 HDi engine. The unit is checked before it is sent.
Diagnose first
Before you order an ECU, make sure it is really the cause. Typical symptoms of a faulty unit are:
- the engine does not start and the injectors are not controlled,
- no communication with the diagnostic tester,
- no power to the ECU despite good fuses,
- a fault after water ingress or a short circuit in the wiring.
Wiring, power supply or sensors can cause similar symptoms.
ECU 5WS40025E-T numbers
The label of this unit shows:
- Siemens number: 5WS40025E-T
- PSA number: 9646801080
- ECU type: Siemens SID801
What you get
- IMMO OFF plug & play version – no programming and no immobiliser pairing after fitting.
- Free cloning of data from your ECU (once you send it to us).
- EGR OFF and DPF OFF on request – DPF OFF only for cars with a DPF.
- Warranty: 6 months.
Vehicle compatibility
The ECU fits selected versions of Peugeot and Citroën with the 2.0 HDi engine. The numbers on the label (5WS40025E-T, 9646801080) decide the match, not just the car model and year. If you are not sure, send us a photo of your ECU label.
See also
You will find more engine ECUs in the Peugeot and Citroën categories. All units from this manufacturer are listed on the Siemens page.
Frequently asked questions about ECU 5WS40025E-T
Can I order EGR OFF or DPF OFF?
Yes, on request. DPF OFF is only done if the car is fitted with a DPF.
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What is the warranty on ECU 5WS40025E-T?
The warranty is 6 months.
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How can I check that 5WS40025E-T will fit?
Look at the label on your ECU. It must show the numbers 5WS40025E-T, 9646801080 – the car model and year are not enough.
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How do I know the ECU is faulty?
Typical symptoms are no start, no communication in diagnostics or no power to the ECU. However, wiring, power supply or sensors can cause them too, so run a diagnosis before buying.
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