This fuel rail inlet pipe (part code 1570Q2) is a direct-fit component for the high-pressure common rail system used on a range of Citroën and Peugeot 1.4 HDi and 1.6 HDi e‑HDi engines. Designed for professional workshops and experienced DIY mechanics, the pipe restores proper fuel delivery to the fourth cylinder and helps eliminate leaks, pressure loss and related drivability issues. Key search terms: Fuel Rail Pipe, Fuel Injection Feed Pipe, 1570Q2, 1.4 HDi, 1.6 HDi e‑HDi, Citroën, Peugeot.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Vehicles equipped with 1.4 HDi and 1.6 HDi e‑HDi engines (examples: Citroën C3, C4, Berlingo; Peugeot 207, 208, 308, Partner)
• Product Codes: 1570Q2
• Additional Numbers: N/A

Function And Symptoms

The pipe carries diesel from the high-pressure fuel rail to the injector of the fourth cylinder. When the pipe or its seals fail, symptoms typically include visible fuel leaks near the rail or injector, strong diesel smell, rough idle, loss of power, difficult starting and potential illumination of engine management warnings related to fuel pressure. A leaking feed pipe can quickly reduce rail pressure and affect multiple cylinders.

Installation Recommendations

1. Relieve fuel system pressure before any work (follow manufacturer procedure to avoid spray and fire risk).
2. Work in a well-ventilated area, keep ignition sources away and use appropriate personal protective equipment.
3. Remove any engine covers and components that block access to the rail and injectors.
4. Disconnect the low-pressure feed lines and carefully undo the fittings at the rail and injector. Prepare to catch diesel.
5. Always replace sealing washers/olive seals and use new copper crush washers or O‑rings as specified by the manufacturer. Do not reuse old seals.
6. Fit the new pipe and tighten fittings to the manufacturer’s torque settings (do not overtighten). If torque values are unknown, consult official repair documentation.
7. After installation, prime the fuel system and check thoroughly for leaks at operating pressure. Start the engine and verify correct idle and absence of fault codes.

Why This Part Fails Most Often

• Corrosion and material fatigue from long-term exposure to diesel and environment, especially on older vehicles.
• Mechanical damage during road use or previous service (bent pipes, cracked fittings).
• Degraded or hardened seals and crush washers that no longer provide a leak‑tight connection.
• Improper assembly or overtightening in prior repairs leading to stress cracks or stripped threads.
• Contaminated fuel or debris that accelerates seal wear and damages sealing surfaces.

Suitable for replacement during fuel rail or injector service. Ideal for garages and competent DIYers who can follow safe fuel‑system procedures. Check visual condition of the rail and injector connections when replacing this pipe to ensure long‑term reliability.