9661700480 21585900-1 – 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.
Fitting without programming
ECU 9661700480 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: 9661700480
- Valeo number: 21585900-1
- ECU type: Valeo J34P
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.
Vehicle compatibility
The ECU fits selected versions of Peugeot and Citroën with a petrol engine. The numbers on the label (9661700480, 21585900-1) decide the match, not just the car model and year. If you are not sure, send us a photo of your ECU label.
Looking for a number other than 9661700480? Browse the Peugeot and Citroën categories or the Valeo manufacturer page.
FAQ – ECU 9661700480 (Valeo J34P)
Does ECU 9661700480 fit my car?
Compare the label of your ECU with the numbers 9661700480, 21585900-1. If they match, the ECU fits – the car model alone does not decide this.
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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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Is the ECU new?
No, it is a used ECU, tested before dispatch.
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What is the warranty on ECU 9661700480?
The warranty is 6 months.
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