9665424480 21586539-8A – how to choose the right ECU
We offer a used Valeo J34P ECU intended for Peugeot and Citroën with a petrol engine. The unit is checked before it is sent.
Before fitting
The immobiliser in this ECU is disabled, so it is fitted without programming (plug & play).
- cloning of data from your ECU – free, once you send it to us,
- warranty – 6 months.
Possible symptoms of a faulty ECU
- the engine does not start, no injector control,
- no communication with the ECU during diagnostics,
- the ECU has no power supply although the fuses are fine,
- failure after water ingress or a short circuit in the wiring.
These symptoms can also come from a wiring, power supply or sensor fault, so run a diagnosis before buying.
Matching by part number
- Application: selected versions of Peugeot and Citroën with a petrol engine.
- Numbers to compare: 9665424480, 21586539-8A.
- Model and year do not decide compatibility – the label does.
- Not sure? Send us a photo of your ECU label.
ECU 9665424480 numbers
The label of this unit shows:
- PSA number: 9665424480
- Valeo number: 21586539-8A
- ECU type: Valeo J34P
More units in the Peugeot and Citroën categories and on the Valeo manufacturer page.
Frequently asked questions about ECU 9665424480
How can I check that 9665424480 will fit?
Look at the label on your ECU. It must show the numbers 9665424480, 21586539-8A – the car model and year are not enough.
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Is the ECU new?
No, it is a used ECU, tested before dispatch.
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Will 9665424480 work without programming?
Yes. The immobiliser is disabled (IMMO OFF), so after fitting the ECU needs no programming or pairing with the immobiliser.
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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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