Description
Fuel Pressure Regulator BOSCH For 1.4 HDI And 1.6 HDI Or TDCI Engines
This Bosch fuel pressure regulator is designed for PSA diesel applications and restores stable rail pressure for smooth idling, reliable cold starts and consistent engine performance. Ideal for professional garages and experienced DIY mechanics searching by OE numbers (0928400607, 1634149380), this regulator fits a range of Citroën and Peugeot models with 1.4 HDi and 1.6 HDi/TDCi engines. Replacing a faulty regulator resolves symptoms such as rough idle, loss of power, black smoke and irregular fuel consumption.
Key Benefits: Direct replacement form, OEM-referenced part numbers for fast identification, restores correct fuel rail pressure and reduces drivability issues caused by pressure fluctuations. Suited for workshop use and competent home mechanics familiar with fuel system safety procedures.
Technical Information
- Manufacturer: Bosch
- Model: 1.4 HDi, 1.6 HDi, TDCi Applications
- Product Codes: 0928400607, 1634149380
- Additional Numbers: Stellantis / Citroën / Peugeot References
Compatibility (Typical Applications)
Commonly fitted to a range of Citroën and Peugeot diesel models including but not limited to: 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. Always identify the part by OE/product code when searching.
Installation Recommendations
Follow safe workshop practice when replacing the fuel pressure regulator. Recommended procedure:
- Depressurize The Fuel System: Relieve fuel pressure before disconnecting lines to avoid spray and fire risk.
- Disconnect Battery: Isolate vehicle electrical system to reduce risk of sparks during work.
- Work In A Well-Ventilated Area: Avoid open flames and sources of ignition.
- Disconnect Connectors And Vacuum Lines: Carefully unplug electrical connector and any vacuum or reference hoses to the regulator.
- Remove Mounting Fasteners: Unbolt the regulator and remove it together with its sealing O-ring if present.
- Fit New Seals: Replace any O-rings or sealing washers with new parts to prevent leaks.
- Reassemble And Prime: Reconnect lines and connectors, restore battery power, prime the fuel system (turn ignition on to operate fuel pump) and check for leaks.
- Final Checks: Start engine, check idle stability and scan for fault codes. Clear codes if necessary and re-check for leaks and proper pressure behavior.
Most Common Failure Causes
Fuel pressure regulators typically fail due to the following reasons:
- Diaphragm Damage Or Internal Leakage: Ageing or mechanical damage causes loss of pressure control.
- Contamination: Dirty fuel, particulates or a clogged fuel filter can cause sticking valves or accelerated wear.
- Worn Or Cracked Seals And O-Rings: External leaks and pressure loss from degraded sealing components.
- Vacuum Or Reference Line Faults: Cracked or disconnected vacuum hoses change regulator reference and produce incorrect pressure.
- Corrosion Or Mechanical Wear: Long-term exposure to contaminants and moisture can impair operation.
Symptoms of a failing regulator include rough idle, difficulty starting, loss of power under load, increased fuel consumption, black smoke from the exhaust and occasional fuel smell or visible leaks. Replacing the regulator and associated seals/filters usually restores correct operation.
Order this Bosch-referenced fuel pressure regulator by OE numbers 0928400607 or 1634149380 to quickly locate the correct part for many Citroën and Peugeot 1.4/1.6 HDi/TDCi applications. Suitable for professional fitting or experienced DIY mechanics comfortable with fuel-system work.
