Description
Fuel pressure regulator Bosch for 1.4 HDi and 1.6 HDi/TDCi engines.
This Bosch fuel pressure regulator is a direct-fit replacement commonly used on Citroën and Peugeot 1.4 HDi and 1.6 HDi/TDCi engines. Supplied with original product references, it restores correct common-rail fuel pressure control to eliminate misfiring, poor acceleration and irregular idling. Frequently searched by OEM and supplier codes (for example 1634149380 and 0928400607), this part is aimed at professional workshops and experienced DIY mechanics who need a reliable, fast repair to get vehicles back on the road.
Technical Information
- Manufacturer: Bosch
- Model: Citroën Berlingo, Citroën C3, Citroën C3 Picasso, Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën C5 X7, Citroën Xsara, Citroën Xsara Picasso, Peugeot 307, Peugeot Partner
- Product Codes: 1634149380, 0928400607
- Additional Numbers: Stellantis Citroën Peugeot
Function
The fuel pressure regulator maintains the required pressure in the common-rail fuel system by controlling fuel return or regulating pressure upstream of the injectors. Correct rail pressure is essential for precise injection timing, optimal combustion, reduced emissions and consistent engine performance. A faulty regulator quickly affects drivability, fuel consumption and can trigger engine fault codes.
Common Failure Symptoms
- Hard Starting Or No Start
- Poor Acceleration And Loss Of Power
- Irregular Idle Or Engine Stalling
- Increased Fuel Consumption Or Black Smoke
- Fuel Smell Or Visible Fuel Leaks Around The Rail/Regulator
- Stored Fault Codes Related To Rail Pressure Or Fuel System
Why The Part Fails Most Often
Failures are most often caused by contamination from dirty fuel or a clogged fuel filter, which causes the regulator valve or internal seals to stick or leak. Ageing, varnish deposits from poor-quality fuel and mechanical wear of the internal valve or diaphragm also contribute. Electrical connector corrosion or damaged O-rings/seals can lead to leaks and pressure loss.
Replacement Procedure And Recommendations For Installation
- Depressurize The Fuel System Before Starting: Remove the fuel pump fuse or relay and crank the engine until it stalls, or follow the manufacturer procedure to relieve rail pressure.
- Disconnect The Negative Battery Terminal As An Extra Safety Precaution.
- Carefully Disconnect The Electrical Connector And Fuel Lines From The Regulator. Use Correct Fuel Line Tools To Avoid Damage.
- Remove The Old Regulator And Replace Any Sealing O-Rings Or Seals With New, Fuel-Resistant Parts.
- Install The New Regulator, Ensure Proper Seating And Torque To Manufacturer Specifications.
- Reassemble Fuel Lines And Reconnect The Battery, Then Prime The Fuel System By Cycling The Ignition Or Using The Fuel Pump Procedure.
- Check For Leaks With The Engine Running, Clear Any Stored Fault Codes And Verify Rail Pressure With Diagnostic Equipment If Possible.
Always Use New Seals When Replacing The Regulator. Inspect The Fuel Filter And High-Pressure Pump At The Same Time—contaminants That Damaged The Regulator May Have Affected Other Components.
Notes For Mechanics And DIYers
This component is a mechanical/electro-mechanical part of the common-rail system. It is often searched for by product number, so check the listed references before ordering to ensure fitment. If fault codes remain after replacement, confirm wiring, fuel pump operation and rail pressure sensor readings before replacing additional components.
Compatibility And Search Tips
Compatible With Many Citroën And Peugeot Models Equipped With 1.4 HDi And 1.6 HDi/TDCi Engines. Commonly Referenced By Codes 1634149380 And 0928400607—searching these numbers speeds up correct part identification.
Warranty And Quality
Supplied As An OEM-Equivalent Bosch Unit Intended For Professional Fitment. Replace O-Rings And Follow The Recommended Installation Steps To Ensure Long Service Life And Prevent Fuel Leaks.
