Description
BOSCH Engine Control Unit for Citroën and Peugeot Vehicles With 1.6 HDi 80 kW Engine.
This Bosch EDC16C34 engine control unit is designed for PSA Group diesel applications with the 1.6 HDi (80 kW) powerplant. It manages fuel injection timing, common‑rail pressure control, boost management and emissions strategies to ensure smooth running, optimal fuel economy and compliance with emissions regulations. Frequently searched by OE and Bosch part numbers, this ECU is suitable for mechanics and DIY enthusiasts looking for a direct engine management replacement for compatible Citroën and Peugeot models.
Technical Information
- Manufacturer: Bosch
- Model: Citroën / Peugeot 1.6 HDi (80 kW)
- Product Codes: 0281013872, 9664843780
- Additional Numbers: 1677633280, 1943K7, HW 9653958980, 1943K8, NFP
- Type: EDC16C34 Engine Control Unit (Diesel)
Compatible Models (Examples)
Fits Citroën and Peugeot vehicles equipped with the 1.6 HDi 80 kW engine — for example Citroën C4 Picasso and other PSA models that use the EDC16C34 platform. This list is illustrative; verify exact part number cross‑reference before installation.
Function And Benefits
The ECU controls injection quantity and timing, common‑rail pump control, turbocharger boost and exhaust gas recirculation, as well as diagnostic communication with the vehicle network. Replacing a faulty ECU restores drivability, removes limp‑home modes, and clears engine management faults that cause poor fuel economy, rough idle or loss of power.
How Replacement Is Performed
Typical replacement steps: disconnect the negative battery terminal, locate the ECU (engine bay or passenger footwell depending on model), carefully release electrical connectors and retaining screws, swap units and secure connectors. After physical installation the unit usually requires cloning or coding to the vehicle immobilizer and key data — see the important coding section below. Avoid contaminating connectors and protect the ECU from static discharge during handling.
Installation Recommendation
Always Disconnect The Battery Before Starting Work. Use Proper Tools And ESD Protection. Inspect Connector Pins For Corrosion Or Damage And Clean As Necessary. Replace Mounting Hardware Grommets If Damaged To Prevent Water Ingress. After Mounting, Perform Full Diagnostic Check And Clear Codes Where Appropriate.
Installation And Coding – Important
– The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
– Options To Commission The Unit:
1) Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
2) Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
– Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
– Before Removal/Installation Always Disconnect The Battery And Follow The Manufacturer’s Procedure To Avoid Damaging The Unit.
Why This Part Commonly Fails
Common failure causes include Water Ingress And Connector Corrosion, Electrical Surges Or Voltage Spikes, Thermal Stress And Ageing Leading To Solder Joint Failures, And Mechanical Damage From Improper Handling. Symptoms Of ECU Problems Include Persistent Engine Fault Codes, Intermittent Stalling, Loss Of Power, Or Complete No‑Start Conditions.
Notes For Professionals And Enthusiasts
This ECU is commonly searched by OE numbers (0281013872, 9664843780) — include the part number when looking up cross references. For reliable commissioning use cloning or DiagBox coding to ensure immobilizer and engine functions are fully restored. If you are not equipped with PSA diagnostic tools, arrange professional coding after physical installation.
