Description
BOSCH Fuel Pressure Regulator for 1.4 e-HDi, 1.6 e-HDi and TDCi Engines for CITROËN, PEUGEOT and FORD Vehicles.
This Bosch fuel pressure regulator is designed to restore and maintain the correct fuel rail pressure for 1.4 and 1.6 e-HDi diesel engines and a range of TDCi diesel units. A correctly functioning regulator ensures stable injection timing, optimal combustion and fuel economy while preventing rich or lean running conditions that cause rough idle, loss of power and increased emissions. The unit is a direct-fit replacement for many PSA and Ford applications and is commonly searched by the OEM and Bosch reference numbers listed below.
Technical Information
- Manufacturer: Bosch
- Model: 1.4 e-HDi, 1.6 e-HDi, TDCi (compatible applications)
- Product Codes: 0928400788
- Additional Numbers: 1609343880, 9806448980
Compatibility And Typical Applications
Commonly fitted to diesel models within the Stellantis group and some Ford TDCi engines. Typical vehicle examples include:
- Citroën Berlingo B9
- Citroën C3 Picasso
- Citroën C4 II
- Peugeot 308
- Peugeot Partner Tepee
Installation Recommendations
Installing a fuel pressure regulator on modern diesel systems requires care and the correct sequence to avoid damage and ensure safe operation:
- Depressurize the fuel system before any work. Fuel under pressure can cause injury.
- Disconnect the battery as a safety precaution and follow manufacturer procedures while working on the fuel system and electrical connectors.
- Locate the regulator on the common rail or fuel distributor. You may need to remove intake covers or associated components for access.
- Unplug the electrical connector and any vacuum lines (if present). Remove mounting fasteners and extract the regulator carefully to avoid damaging the fuel rail or sealing surfaces.
- Replace sealing O-rings or gaskets with new parts and ensure proper seating. Use correct torque values on fasteners and avoid overtightening.
- After installation, prime the system and check for leaks. Start the engine and verify stable idle and correct fuel pressure with diagnostic tools if available.
- For high-pressure common-rail systems and electronic-regulated units, professional tools and experience are recommended. If uncertain, have the replacement performed by a qualified diesel technician.
Why The Part Most Often Fails
Fuel pressure regulators fail for several common reasons:
- Contaminated Fuel: Particles, water or degraded fuel can clog internal valves or damage the diaphragm/actuator, causing pressure drift or sticking.
- Wear And Age: Mechanical wear, seals and O-rings degrade over time, leading to leaks and loss of regulation accuracy.
- Electrical Faults: For electronically controlled regulators, connector corrosion or internal electronic failure can prevent correct control signals.
- Injector/Return Flow Issues: Blocked return lines or failing injectors can overload the regulator and accelerate failure.
Typical symptoms of a failing regulator include hard starting, unstable idle, loss of power, increased fuel consumption, black smoke from the exhaust and diagnostic trouble codes relating to fuel pressure. Replacing the regulator and addressing the root cause (fuel contamination, failing injectors, clogged filters) is essential to prevent repeat failures.
Choose this Bosch replacement when you need a reliable, direct-fit solution for the specified 1.4/1.6 e-HDi and compatible TDCi applications. Use correct installation practice and, where necessary, a qualified diesel specialist for safe and lasting results.
