Description
Electric engine wiring harness for Citroën and Peugeot vehicles with 1.6 e-HDi 68 kW engine.
The Engine Wiring Harness 9803029180 / 9678305680 is a direct-fit electrical assembly designed for the 1.6 e-HDi 68 kW common-rail diesel engines used in selected Citroën and Peugeot models. This harness routes power and signal lines between the engine control unit, injectors, sensors, glow plugs and other engine peripherals. Designed for professional workshops and DIY mechanics, the harness restores reliable signal transmission, reduces intermittent faults and helps eliminate check-engine warnings caused by damaged wiring or corroded connectors.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C4 II (1.6 e-HDi 68 kW); Peugeot 308 (1.6 e-HDi 68 kW)
- Product Codes: 9803029180, 9678305680
- Additional Numbers: 9803029180 / 9678305680
Application
Intended For Vehicles Equipped With The 1.6 e-HDi 68 kW Engine. Common Fitment Includes Citroën C4 II And Peugeot 308 Models. Always Confirm Engine Type And Part Number Before Ordering.
Function And Typical Symptoms
The engine wiring harness transmits electrical power and sensor signals between the engine management system and engine components (injectors, sensors, glow plugs, alternator, etc.). When The Harness Is Damaged Or Connections Are Corroded, Symptoms May Include Intermittent Engine Misfires, Hard Starting, Loss Of Sensor Signals, Warning Lights On The Dashboard, Or Complete No-Start Conditions.
Common Causes Of Failure
- Heat And Vibration Leading To Insulation Cracking Or Wire Breakage.
- Connector Corrosion From Moisture Ingress Or Road Salt.
- Abrasion From Contact With Engine Components Or Mounting Points.
- Previous Poor Repairs Or Aftermarket Modifications.
- Rodent Damage Causing Chewed Wires.
Replacement Procedure
Recommended For Experienced Technicians Or Competent DIY Mechanics:
- Disconnect The Battery Before Starting To Prevent Short Circuits.
- Remove Engine Covers And Any Components Blocking Access To The Harness Route.
- Label Or Photograph All Connectors To Ensure Correct Reconnection.
- Unplug Connectors Carefully, Release Retaining Clips And Remove Old Harness From Mounting Points.
- Install The New Harness Along The Same Route, Securing All Clips And Fasteners To Prevent Rubbing Or Contact With Hot Parts.
- Reconnect All Connectors Firmly; Check For Bent Pins Or Debris In Connector Housings.
- Reconnect The Battery, Clear Fault Codes If Present, And Run Engine Tests To Verify Function (idle Stability, Sensor Readings, No Warning Lights).
Installation Recommendations
- Always Disconnect The Battery Before Removing Or Installing The Harness.
- Use Original-Style Mounting Clips And Fasteners To Prevent Movement And Abrasion.
- Inspect Connector Pins For Corrosion; Clean With Appropriate Contact Cleaner If Needed.
- Protect Exposed Sections With Heat-Resistant Sleeving Where Near Exhaust Or Turbo Components.
- Avoid Excessive Pulling Force On Wires; Support The Harness During Routing To Prevent Stress On Connectors.
- After Installation, Clear Engine Fault Codes And Perform A Road Test To Confirm Repair.
Why The Part Most Commonly Fails
Engine Bay Conditions Combine Heat, Movement And Contaminants, Which Gradually Degrade Insulation And Connector Integrity. Corrosion From Moisture And Road Salt, Mechanical Abrasion Against Other Components, And Rodent Damage Are The Most Frequent Causes Leading To Harness Failure.
Notes For Buyers
Check The Part Numbers 9803029180 And 9678305680 Against Your Vehicle Documentation To Ensure Fitment. This Harness Is Supplied For Vehicles With The 1.6 e-HDi 68 kW Engine And Is Intended To Replace Worn Or Damaged Original Wiring Assemblies.
