ABS ESP pump Bosch Citroën Peugeot 9666199180 0265951253

Description

Hydraulic brake control block, ABS ESP pump, unit, Bosch ABS cube
For CITROEN C4 PICASSO cars

Part description

This used Bosch part is intended for the brake system of Citroën C4 PICASSO cars and serves as an ABS ESP pump with hydraulic block and control part. It is an important part of the ABS and ESP system, which is involved in the regulation of the braking effect and the stability of the car while driving.

The advantage is specific identification by production numbers, which makes it easier to find the part when repairing or replacing the original unit. This type of part is often searched not only by name, but also by Bosch numbers and PSA OE codes.

Technical information

• Manufacturer: Bosch
• Model: Citroën C4 PICASSO
• Other numbers: 9666199180, 0265951253, 4541JH, 4541JJ, 4541QE

This is part of the ABS and ESP / brake system / ABS ESP modules category.

Product codes

• Product codes: 9666199180, 0265951253, 4541JH, 4541JJ, 4541QE
• Models: Citroën C4 PICASSO

Installation recommendations

Generally/typically, when replacing an ABS/ESP module with a hydraulic block, the exact procedure depends on the specific design of the car and the brake system. Below is a safe general procedure for this type of part.

1) Before assembly

• Compare the used part with the old one by all the numbers on the label and by the design of the connectors.
• Check whether the body is damaged, cracked, deformed or dirty.
• Check the condition of the electrical connector, contacts and brake pipe connection threads.
• Before disassembling the original part, mark the lines and the position of the individual connections to avoid confusion during assembly.

2) Necessary tools and materials

• Common hand tools
• Suitable wrenches for disassembling the fixing and connecting the line
• Cleaning agent for technical components
• Clean lint-free cloths
• Protective gloves
• Diagnostic equipment suitable for subsequent control of system function

3) Step-by-step assembly procedure

1. Park the vehicle in a safe place and secure it against movement.
2. Disconnect the battery and wait until the electrical systems are completely disconnected.
3. Get access to the original ABS/ESP unit according to the car design.
4. Disconnect the electrical connector carefully, without force and without damaging the latches.
5. Mark the individual connections if the design requires it, then carefully disconnect the wiring.
6. Disassemble the fixing of the old part and remove it in such a way as not to contaminate the surrounding parts.
7. Compare the old and new part again just before assembly, especially the numbers, connectors and connection layout.
8. Sit the used part in place and secure it in the correct position without crossing or straining.
9. Reconnect all wiring and electrical connector carefully and sensitively to avoid damaging threads or contacts.
10. Check that nothing is loose, crossed or mechanically stressed.
11. Restore power to the vehicle by connecting the battery.
12. Perform a basic system function check and follow-up service actions typically associated with this type of intervention.
• 4) Post-assembly checks and test drive/function verification
  • Inspect for signs of leakage or poor connection fit after assembly.
  • Verify that the electrical connector is properly seated and not loose.
  • Check system status and unit functionality using diagnostics.
  • During the test drive, observe the behavior of the braking system and the ABS/ESP warning light.
  • After driving, perform a visual inspection of the connection and fastening again.

  5) The most common assembly mistakes + how to avoid them

  • Part exchange based on incorrect number – always compare all product numbers listed.
  • Damage to the connector or contacts – disconnect and connect the connector carefully, without using force.
  • Impurity around the connection – keep the work area and the part clean before assembly.
  • Incorrect wiring or connection confusion – mark the individual points before disassembly.
  • Skip the output check – always perform a function check and verification of the system behavior while driving after assembly.

  Reasons why the part is damaged

  • long-term load and normal wear and tear during vehicle operation,
  • intrusion of moisture or dirt into the electrical or hydraulic part,
  • damage to the connector, wiring or contacts,
  • mechanical stress, vibration and corrosion,
  • improper handling during previous disassembly or assembly,
  • defect in downstream parts of the brake or electrical system.