Engine control unit 9663717680 21585984-5 (Valeo J34P)
Used Valeo J34P module for Peugeot and Citroën with a petrol engine – we check it before dispatch.
Fitting without programming
ECU 9663717680 has its immobiliser disabled (IMMO OFF). Once connected in the car, it does not need programming or pairing with the immobiliser. Want to transfer the data from your old ECU? Send it to us – cloning is free. The warranty is 6 months.
Numbers on the label
- PSA number: 9663717680
- Valeo number: 21585984-5
- ECU type: Valeo J34P
How to check compatibility
The most reliable way is to compare labels. Your ECU should show the numbers 9663717680, 21585984-5. This unit was used in selected versions of Peugeot and Citroën with a petrol engine, but the number decides compatibility, not the model or year. If in doubt, send us a photo of the label.
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.
Other part numbers are in the Peugeot and Citroën categories, and Valeo units are on the manufacturer page.
Common questions about ECU 9663717680
Does ECU 9663717680 fit my car?
Compare the label of your ECU with the numbers 9663717680, 21585984-5. If they match, the ECU fits – the car model alone does not decide this.
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Is the ECU new?
No, it is a used ECU, tested before dispatch.
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Is cloning charged?
No, cloning is free. Send us your ECU and we will transfer the data from it.
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Will 9663717680 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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