This Bosch gearbox ECU is a direct-fit control module designed for the automatic transmissions used on Citroën C5 and Peugeot 607 2.2 HDi (4HX) engines producing 98 kW. It is commonly searched by OEM part numbers such as 0260002767 and 9641281180, making it easy to find for professional technicians and DIY mechanics alike. The unit manages gear selection, shift timing and torque converter lock‑up to ensure smooth, reliable shifting and optimal fuel efficiency.

Technical Information

• Manufacturer: Bosch (used on Stellantis Citroën/Peugeot vehicles)
• Model: Citroën C5, Peugeot 607 — 2.2 HDi (engine code 4HX), 98 kW
• Product Codes: 0260002767, 9641281180
• Additional Numbers: 9643703380, 9641281280, 260002767, 2529L8

Fitment And Compatibility

Fits automatic transmission variants of Citroën C5 and Peugeot 607 equipped with the 2.2 HDi 4HX 98 kW engine. Buyers frequently search by the listed part numbers (0260002767 / 9641281180 / 2529L8); always verify the part number on the old unit before installation to ensure perfect match.

Function And Benefits

The transmission control unit interprets sensors (speed, throttle position, engine load, temperature) and commands the transmission actuators accordingly. A functioning ECU improves shift quality, protects the gearbox from incorrect shifting and contributes to better drivability and fuel economy. Replacing a faulty unit restores correct shift logic and eliminates many transmission-related fault codes.

Replacement Procedure

1. Prepare Vehicle: Park on level ground, engage parking brake and isolate the electrical system.
2. Disconnect Battery: Always disconnect the negative battery terminal before starting to avoid damage to electronic modules.
3. Locate Unit: Consult the vehicle workshop manual or service documentation for the exact location of the gearbox ECU on the specific model.
4. Remove Connectors: Carefully unlock and unplug electrical connectors. Inspect pins and housing for corrosion or damage.
5. Unbolt And Replace: Remove mounting fasteners, swap the old unit with the new one and secure to the original torque recommendations.
6. Reconnect And Initialise: Reconnect connectors and battery. The unit may require coding or adaptation—perform diagnostics and adaptations using appropriate PSA diagnostic tools.
7. Test And Verify: Clear stored fault codes, carry out a road test and recheck for transmission faults and proper shift behavior.

Installation Recommendations

Before installation inspect connector pins and wiring harness for corrosion, mechanical damage or signs of water ingress. Always follow manufacturer procedures and torque settings. If coding or adaptation is required, use dedicated PSA diagnostic equipment (DiagBox/Lexia/PP2000) or an equivalent professional-level tool to initialise the unit and perform transmission adaptations. Before any handling of the ECU, disconnect the battery to prevent electrical damage.

Most Common Failure Reasons

Failures are typically caused by long-term exposure to heat and vibration, moisture ingress or corroded connectors, faulty solder joints, or electrical surges. Symptoms of a failing transmission ECU include erratic shifting, gear hunting, limp-home mode, stored transmission fault codes and warning lights. In many cases the root cause is connector/wiring issues rather than the ECU itself, so inspect the harness carefully when diagnosing.