Description
Complete engine wiring harness for CITROËN PEUGEOT vehicles with 2.0 HDi 120 kW RHE engine
Engine electrical harness
Description
This complete engine wiring harness is designed for PSA 2.0 HDi (RHE) 120 kW engines and provides reliable electrical connectivity for all engine sensors and actuators. Manufactured to fit Citroën and Peugeot applications, the harness ensures proper signal routing and secure connector interfaces for systems essential to engine management, diagnostics and emissions control. Ideal for professional garages and experienced DIY mechanics looking for an exact-fit replacement using the original equipment part numbers 9670135380 and 658556.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 Picasso; Citroën C5 X7; Peugeot 3008 I; Peugeot 5008 I
- Product Codes: 9670135380, 658556
- Additional Numbers: NFP
Function And Scope
The engine wiring harness routes power and communication between the engine control unit and critical components such as injectors, temperature and pressure sensors, crank/cam sensors, glow plug circuits, alternator and starter circuits, and various actuators. A correctly routed and secured harness prevents electrical faults, intermittent signals and diagnostic trouble codes that can lead to poor running, reduced fuel economy or failed emissions tests.
Installation Recommendations
Always disconnect the battery before starting removal or installation. Recommended procedure for replacement:
- Park the vehicle on a level surface and allow the engine to cool.
- Disconnect the battery negative terminal to avoid short circuits.
- Label or photograph connectors and routing to ensure correct reinstallation.
- Remove any obstructing components (airbox, intake plenum, engine covers) to access harness clips and connectors.
- Unclip the old harness from brackets and detach connectors from sensors and actuators; take care with fragile plastic clips and pins.
- Route the new harness following original clips and grommets, secure with new clips if necessary, and reconnect all plugs firmly.
- Reconnect the battery and perform a full system check: clear fault codes, run engine and verify sensor readings and charging system operation.
Use dielectric grease on exposed connectors where appropriate to reduce corrosion. Replace damaged clips, grommets or protective tubing to avoid chafing against hot or moving parts.
Why This Part Most Commonly Fails
Engine wiring harnesses fail primarily due to mechanical and environmental stress. Common causes include vibration and repeated flexing, heat exposure from exhaust components, chafing against sharp edges, water or salt ingress leading to connector corrosion, and rodent damage. Connector pin corrosion or broken insulation often produces intermittent faults that manifest as misfires, sensor errors or communication loss with the engine control module.
Signs Of Failure
Typical symptoms indicating a faulty harness include illuminated check engine light, intermittent misfires, loss of communication with specific sensors or actuators, difficulty starting, unexpected engine behavior and diagnostic trouble codes pointing to sensor circuits or injector banks.
Compatibility Notes
This harness is intended for vehicles equipped with the 2.0 HDi RHE 120 kW engine. Confirm the part numbers 9670135380 or 658556 against the vehicle’s build specification before ordering. Fitting the correct harness ensures plug-and-play connectivity with factory harness routing and mounting points.
Recommended For
Professional workshops and experienced DIYers performing engine electrical repairs, wiring replacement after accident damage, rodent-related repairs or full engine swaps where the original harness is damaged or unreliable.
