This diesel fuel heater (part numbers 190434 / 9305-108C) is designed for PSA Group HDi engines and helps ensure reliable cold starts and stable idling in low-temperature conditions. Ideal for professional mechanics and experienced DIY enthusiasts who maintain Citroën and Peugeot diesel vehicles. Commonly searched by part number 190434 or 9305-108C, this unit replaces faulty or worn heaters in the fuel supply circuit to reduce waxing, improve fuel atomization during cold starts and prevent drivability issues caused by cold diesel.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Fuel Heater For 1.4 HDi 16V And 1.6 HDi Engines
• Product Codes: 190434, 9305-108C
• Additional Numbers: Stellantis Citroën Peugeot References 190434 / 9305-108C

Compatibility And Applications

Compatible With Multiple Citroën And Peugeot Models Equipped With 1.4 HDi 16V Or 1.6 HDi Engines, Including But Not Limited To:

• Citroën Berlingo
• Citroën C3
• Citroën C3 Picasso
• Citroën C4
• Citroën C4 Picasso
• Citroën C5
• Citroën Xsara Picasso
• Peugeot 207
• Peugeot 307
• Peugeot 308
• Peugeot 407
• Peugeot Partner

Function And Typical Symptoms Of Failure

The Fuel Heater Warms Diesel In The Fuel Supply To Improve Cold Starting Performance And Prevent Waxing Or Gelling At Low Temperatures. When The Heater Starts To Fail, Drivers May Notice Longer Cranking Times, Difficult Cold Starts, Rough Idle After A Cold Start, Or Increased Smoke During Warm-Up. Electrical Faults Or Loss Of Heating Will Directly Affect Cold-Weather Driveability.

Replacement Procedure

Basic Replacement Steps (General Guidance):

• Work In A Well-Ventilated Area And Observe Fire Safety When Working With Diesel System Components.
• Relieve Fuel-System Pressure According To Vehicle Service Manual Before Disconnecting Fuel Lines.
• Disconnect Electrical Connector To The Heater And Remove Any Retaining Clips Or Fasteners Securing The Unit.
• Replace The Heater Unit Along With Any Sealing Rings Or Gaskets To Prevent Leaks.
• Reassemble Fuel Lines, Prime The Fuel System If Required (Bleed Air), Start Engine And Check For Leaks And Proper Operation.

Installation Recommendations

• Always Replace Seals And O-Rings When Installing A New Unit To Ensure Leak-Free Operation.
• Use Clean Tools And Keep Dirt Out Of The Fuel System During Replacement; Contamination Is A Common Cause Of Subsequent Failures.
• After Installation, Prime The Fuel System And Check For Air Entrapment; Follow Manufacturer Procedures For Bleeding The System.
• Verify Electrical Connector Contacts Are Clean And Secure To Avoid Intermittent Faults.
• When In Doubt Or If Special Tools Are Required, Have Installation Performed By A Qualified Technician.

Most Common Failure Causes

• Fuel Contamination (Dirt, Water Or Microbial Growth) Leading To Blockage Or Corrosion.
• Corrosion Or Degradation Of Electrical Contacts Due To Moisture In The Fuel Or Connector Area.
• Thermal Cycling And Wear Over Time Causing Element Degradation.
• Fuel Filter Neglect Allowing Particles To Reach The Heater Component.

Buy With Confidence If You Require A Direct Replacement For Part Number 190434 / 9305-108C. Suitable For Workshop Fitment And For Experienced DIY Mechanics Who Follow Proper Safety And Fuel-System Procedures.