Part description

Used brake pipe to the ABS/ESP module for Citroën and Peugeot vehicles, identified in the documentation by numbers 4887T0 and 4887T1. The listed models are the Citroën C4 and Peugeot 307. The pipe is part of the hydraulic braking system and carries brake fluid between the module and the connected parts of the system.

When selecting a replacement for a damaged or leaking pipe, it is important to compare not only the product numbers but also the routing shape, fittings and mounting points with the original part. The same vehicle model alone does not guarantee that the pipe version is the same. Choosing the correct part helps preserve the appropriate routing of the braking system without improvised modifications.

Technical information

• Manufacturer: Stellantis – CITROEN PEUGEOT, according to the documentation
• Model: Citroën C4, Peugeot 307
• Part type: brake pipe to the ABS – ESP module
• Condition: used part
• Other numbers: not specified
• Other designation in the documentation: NFP
• Model years and engine variants: not specified

Product codes

• Product codes: 4887T0, 4887T1

These numbers serve as the basic identification when searching for the part. The documentation does not specify whether these designations are interchangeable or what the delivery includes; when selecting a part, therefore, also take into account the configuration of the original pipe.

Installation recommendations

The following procedure is a general guide to replacing a brake pipe. The exact steps, access to the connections and bleeding procedure depend on the specific model and vehicle configuration. This is a safety-critical component: installation should be carried out by someone experienced in brake repairs and equipped with the appropriate tools.

1) Before installation

• Compare the product numbers, length and routing shape, threads, fitting contact surfaces and mounting points with the old part.
• Inspect the pipe along its entire length, especially at bends, around the fittings and at mounting points. Look for corrosion, cracks, dents, abrasions and signs of leakage.
• Check that the openings are clean and that the threads are in good condition. Do not install a pipe with a damaged surface, deformation or damaged connections. A visual inspection alone does not guarantee pressure tightness.
• Find out in advance the prescribed procedure for opening the hydraulic circuit and bleeding the brakes for the specific vehicle.

2) Tools and materials required

• Flare nut wrenches for brake pipes and standard installation tools.
• Suitable equipment for safely lifting and supporting the vehicle, if needed for access.
• A collection container, clean protective caps for open connections and supplies for cleaning the area around the joints.
• Protective gloves and glasses, and products to protect painted surfaces.
• Brake fluid specified by the manufacturer of the specific vehicle and brake bleeding equipment; diagnostic equipment may also be required, depending on the service procedure.

3) Installation procedure step by step

1. Secure the vehicle against movement and ensure safe access to the pipe. When working under a raised vehicle, use appropriate supports.
2. Prepare the braking system for service according to the manufacturer’s instructions. Protect painted surfaces from brake fluid.
3. Record the original pipe route and the positions of its mounting points, for example with photographs.
4. Clean the area around the connections before opening them to prevent dirt from entering the hydraulic circuit.
5. Place a collection container under the joints. Carefully loosen the connections with a suitable wrench without twisting the pipe or applying force to the module.
6. Release the pipe from its brackets and remove it. Protect open connections with clean, suitable caps; do not allow the reservoir to empty unnecessarily.
7. Compare the two parts side by side again. If the replacement pipe does not match or needs to be forcibly reshaped, stop the installation.
8. Position the replacement pipe along the appropriate route without tension. Start threading the fittings by hand to avoid cross-threading.
9. Secure the pipe in its brackets and tighten the connections according to the manufacturer’s service instructions. Check that the pipe does not touch moving parts, sharp edges or heat sources.
10. Top up with the specified brake fluid and bleed the system using the procedure for the specific vehicle. If the procedure requires activation of the ABS module using diagnostic equipment, do not skip this step.
11. Clean and dry the joints, check the fluid level, and carry out a static leak check and check the brake pedal response.

4) Post-installation checks and function verification

Press the brake pedal and check that no fluid is leaking, the pedal does not sink, and the pipe remains securely mounted. Also check the brake system warning indicators. Do not drive the vehicle if there is a leak, the pedal feels spongy or a brake fault remains unresolved. Only after a successful static check should you carefully test the brakes at low speed in a safe place away from normal traffic. Then inspect the connections and fluid level again; checking brake performance on a test bench is also recommended.

5) Common installation errors and how to avoid them

• Incorrect version: compare the codes, fittings and the entire pipe route before installation.
• Cross-threading or overtightening: start threading the connections by hand and follow the manufacturer’s instructions.
• Forcing bends or installing under tension: the pipe must follow the route and fit the brackets without being forced into place.
• Contamination of the circuit: clean the connections before disconnecting them and protect open ports.
• Insufficient bleeding: follow the procedure for the specific braking system, including the use of diagnostic equipment if required.
• Skipping the leak check: check the joints under pressure before driving and again after the functional test.

Reasons why the part gets damaged

The following are common causes of damage to brake pipes in general; they do not describe any defects identified on this particular part:

• Corrosion caused by moisture, road salt and damage to the protective surface coating.
• Chafing at the mounting point or against nearby components if a bracket is missing or loose.
• Mechanical damage caused by improper work, an accident or handling of the pipe.
• Fatigue cracking due to vibration and prolonged stress in an incorrectly routed pipe.
• Damage to threads and contact surfaces caused by using unsuitable tools, cross-threading or overtightening.