Description
Description
Reliable Bosch Engine Control Unit (ECU) EDC16C34 designed for PSA diesel engines. Direct fit for Citroën C3 1.4 HDi 50 kW and compatible PSA models when matching part numbers. Ideal for professional workshops and experienced DIY mechanics searching by part number 0281012529 or 9663475880.
Function
The ECU manages fuel injection timing, turbo boost control, exhaust gas recirculation (EGR) and other emission-related functions to optimize performance and fuel economy. It reads sensors such as MAP, crankshaft and camshaft position, temperature and controls injectors and actuators accordingly.
Replacement & Installation
Typical replacement procedure: disconnect the negative battery terminal, remove any trim panels or glovebox to access the module, unplug the wiring harness connectors, remove mounting bolts and extract the ECU. Install the replacement unit in reverse order. After replacement, immobilizer pairing or ECU coding may be required; use appropriate diagnostic equipment (PSA tools or specialist bench programmers). Always follow safe battery isolation procedures and consider professional programming or cloning to avoid immobilizer or drivability issues.
Common Faults & Causes
Symptoms include no-start, rough idle, loss of power, increased fuel consumption, limp mode or stored fault codes. Common causes are water ingress, connector corrosion, thermal fatigue, voltage spikes or software corruption. There is no scheduled replacement interval; failure is typically age- or damage-related. Inspect connectors and mounting area for signs of moisture or heat damage before replacing the ECU.
Technical Information
- Manufacturer: Bosch
- Model: EDC16C34
- Product Codes: 0281012529, 9663475880
- Additional Numbers: 1943T3, 1677616480, 9657699480
- Fitment Example: Citroën C3 1.4 HDi 50 kW
