Description
Bosch Fuel Pressure Regulator for 1.4 HDi and 1.6 HDi/TDCi Engines
Product Overview
This Bosch fuel pressure regulator (part number 0928400607) is designed for PSA Group diesel engines in the 1.4 HDi and 1.6 HDi / TDCi families. It controls the fuel rail pressure by regulating return flow and vacuum actuation, ensuring stable common-rail pressure for reliable injection timing and optimal engine performance. Ideal for professional workshops and DIY mechanics repairing Citroën and Peugeot diesel models.
Key Benefits
- Direct Fit For Many PSA Diesel Engines: Simple replacement using OE-style mounting and connections.
- Restores Fuel Pressure Stability: Helps eliminate rough idle, poor acceleration, hard starting and black smoke related to pressure control faults.
- OE-Sourced Component: Bosch design and specifications for long-term compatibility with common-rail systems.
- Searchable By Part Number: Commonly listed under 0928400607 and 1634149380 for quick identification.
Technical Information
- Manufacturer: Bosch
- Model: Citroën Berlingo; Citroën C3; Citroën C3 Picasso; Citroën C4; Citroën C4 Picasso; Citroën Xsara Picasso; Peugeot 307; Peugeot 308; Peugeot 407; Peugeot Partner (1.4 HDi / 1.6 HDi / TDCi Applications)
- Product Codes: 0928400607
- Additional Numbers: 1634149380
How It Works
The regulator modulates the pressure in the common-rail system by adjusting the amount of fuel returned to the tank or low-pressure side based on vacuum actuation and internal spring/diaphragm balance. Correct rail pressure is essential for accurate injector timing and spray pattern, affecting power, emissions and fuel economy.
Replacement Procedure (Overview)
- Relieve Fuel System Pressure Before Starting Work To Prevent Fuel Spray.
- Disconnect Battery Before Removing Any Fuel System Components To Reduce Fire Risk.
- Locate The Regulator On The Fuel Rail Or High-Pressure Pump (Depends On Model) And Remove Vacuum/Electrical Connections.
- Unscrew The Mounting Fasteners, Remove The Old Unit And Replace Any Seals Or O-Rings With New Ones.
- Fit The New Regulator, Reconnect Hoses/Connectors And Re-pressurize The System; Check For Leaks.
- Start Engine And Verify Correct Operation. Follow Manufacturer’s Torque Specs And Procedures.
Installation Recommendations
Always use new sealing rings or gaskets when installing a replacement regulator. Work In A Well-Ventilated Area And Keep Fire Extinguishing Equipment Nearby When Working On Fuel Systems. If The Vehicle Has A History Of Fuel Contamination, Inspect And Replace The Fuel Filter And Clean The Fuel System To Prevent Premature Failure Of The New Regulator.
Most Common Cause Of Failure
Failures Are Usually Caused By Fuel Contamination (Debris Or Water), Diaphragm Fatigue Or Damage, And Degraded Vacuum Hoses Or Fittings. Symptoms Include Rough Idle, Hard Starting, Loss Of Power, Increased Fuel Consumption, Black Smoke And Fuel Odor. There Is No Fixed Lifespan — Life Expectancy Depends On Fuel Quality And Maintenance History; Regular Fuel Filter Replacement Reduces Risk.
Compatibility And Search Tips
Mechanics Often Search By Part Number (0928400607, 1634149380) Or By Engine Family (1.4 HDi / 1.6 HDi / TDCi). Use These Identifiers When Looking Up Fitment For Citroën And Peugeot Models.
Notes For Professional Use
Recommended For Professional Workshops And Experienced DIY Mechanics. If You Are Unsure About The Correct Installation Procedure For A Specific Model, Consult The Manufacturer Workshop Manual For Detailed Steps And Safety Instructions.
