Original Piaggio Wiring Harness 580688 – Vespa ET4 125 / X9 250 4T
Codice: 580688
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The original Piaggio 580688 electrical system wiring harness is the OEM spare part indicated for the complete overhaul of the electrical system on Vespa ET4 125 4T and Piaggio X9 250 according to Piaggio's historical catalogs from 1998-2005. It is the main cable assembly that connects the control unit, voltage regulator, ignition coil, key switch, indicators, lights, and auxiliary components, ensuring the electrical integrity of the entire vehicle.
✓ Strengths
- 100% original Piaggio spare part – same wiring harness installed at the factory
- OEM code 580688 – interchangeable with the original factory wiring harness
- Standard cables and connectors – color-coded pins according to the Piaggio electrical diagram
- Definitive solution for problems with short circuits, leaks, and intermittent contacts
- Specific compatibility – Vespa ET4 125 4T and Piaggio X9 250 (historical catalogs 1998-2005)
- OEM traceability – Piaggio code also reported on SIP, Ponzi Racing exploded diagrams and official catalogs
Technical specifications
| Brand | Piaggio (Piaggio Group) |
| OEM Code | 580688 |
| Type | Wiring harness / Main electrical system |
| Function | Connects control unit, regulator, coil, key switch, lights, indicators |
| Reference Exploded Diagram | Panel EY53 – Regulator, Control Unit, Ignition Coil & Electrical System (Vespa ET4 125/150) |
| Related OEM Numbers | 294136 – 580305 – 580688 (Piaggio) |
| Spare part type | Original Piaggio (OEM) |
| Quantity per vehicle | 1 piece |
| Product weight | ~0.9 kg (source SIP Scootershop) |
• The compatibility indicated here is from the official Piaggio B2B catalog: Vespa ET4 125 and Piaggio X9 250 (historical catalogs 1998-2005).
• Piaggio sources from various manufacturers in Europe and Asia, so photographic material may differ slightly from the goods delivered.
• Always verify the correspondence of the code stamped on the used wiring harness (580688) and/or the vehicle identification number (VIN) before purchasing.
• Replacing the complete wiring harness requires dismantling the under-seat / fairings and should be performed by qualified personnel with an electrical diagram at hand.
• Before removal, always disconnect the battery to avoid short circuits.
Vehicle compatibility
| Brand | Model | Years (historical catalogs) |
|---|---|---|
| Vespa | Vespa ET4 125 4T | 1998 – 2005 |
| Piaggio | X9 250 | 1998 – 2005 |
Recommended spare parts in combination
- Original Piaggio voltage regulator – if old or with leaks
- Ignition control unit (CDI) – check functionality if the system is being redone
- Ignition coil – frequent pairing with wiring harness replacement
- Key switch/ignition lock – if contacts are oxidized
- New battery – replacement is recommended after work on the electrical system
- Fuses and fuse holders for replacement
Who it's perfect for
This wiring harness is the ideal choice for owners of Vespa ET4 125 and Piaggio X9 250 who are experiencing electrical system problems (short circuits, intermittent contacts, insulation deteriorated by age) or want to perform a complete restoration of the vehicle, bringing it back to original Piaggio specifications. It is also the right component for specialized Vespa/Piaggio workshops that need a guaranteed OEM spare part, with a traceable official code and full interchangeability with the standard wiring harness.
Moon Bike S.r.l. is an official Piaggio Group dealer (Piaggio, Vespa, Aprilia, Gilera, Moto Guzzi) based in Cercola (NA). The 580688 wiring harness is an original Piaggio spare part supplied directly from the official B2B network, with full OEM traceability and covered by the manufacturer's warranty. We ship throughout Italy and abroad with professional packaging.
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