Description
BOSCH control unit for 1.6 HDI engines for Citroën and Peugeot vehicles. It is from a Peugeot 407 (2007).
This Bosch ECU (EDC16C34) is designed for 1.6 HDi diesel engines used across several Citroën and Peugeot models. The unit manages fuel injection timing, turbo boost control, EGR and emission-relevant functions to ensure smooth running, fuel efficiency and compliance with engine management protocols. Ideal for professional workshops and experienced DIYers who service PSA Group diesel engines, this ECU is commonly identified by multiple OEM and software codes — technicians often search by these numbers when sourcing a replacement.
Compatibility And Application
Compatible With 1.6 HDi Petrol Engines: Primarily used on Peugeot 407, Peugeot 307 and Citroën C4 families (check vehicle application by model year and engine specification). Common in vehicles from the mid-2000s that use the Bosch EDC16C34 platform. Frequently referenced by part numbers and software/hardware codes listed below.
Technical Information
- Manufacturer: Bosch
- Model: EDC16C34 (ECU for 1.6 HDi)
- Product Codes: 0281013332, 9664257580, 9653958980, 1677624580
- Other Numbers: 1942NZ, 1942PF, 1942NX, 1942NY, 1939AL, 1943NW
How The Part Is Replaced
- Disconnect The Negative Battery Terminal Before Any Work To Prevent Short Circuits.
- Locate The ECU (Location Is Vehicle-Specific; Often Mounted In The Engine Bay Or Behind The Glovebox/Dashboard). Refer To Service Manual For Exact Position.
- Remove Mounting Fasteners And Carefully Unplug The Multi-Pin Connectors. Inspect Connectors For Corrosion Or Bent Pins.
- Install The Replacement Unit, Refit Fasteners And Reconnect All Plugs Securely.
- Reconnect The Battery And Clear Any Fault Codes With A Diagnostic Tool. Immobilizer Pairing Or ECU Coding May Be Required Using Dealer-Level Or Compatible Diagnostic Equipment (For Example Diagbox/Lexia Or Equivalent) To Ensure Proper Communication And Engine Start.
Installation Recommendations
- Work In A Clean, Static-Free Environment. Avoid Touching Exposed Pins And Circuitry.
- Always Inspect Wiring Harness And Ground Points; Repair Any Corrosion Or Damaged Insulation Before Installing The New ECU.
- Use A Suitable Diagnostic Tool After Installation To Read Clear Fault Codes, Update Software If Needed, And Perform Immobilizer/Key Pairing When Required.
- If You Are Unsure About Coding Procedures, Seek A Professional Workshop Equipped With PSA-Compatible Diagnostic Tools.
Why This Part Fails Most Often
ECUs typically fail due to electrical and environmental stresses rather than wear. Common causes include:
- Water Ingress Or Moisture Causing Corrosion Or Short Circuits.
- Damaged Or Corroded Connectors Leading To Intermittent Signals.
- Voltage Spikes, Poor Grounding Or Faulty Charging Systems Causing Electronic Component Failure.
- Thermal Stress And Aging Of Electronic Components Or Solder Joints.
- Software Corruption Following Failed Updates Or Power Loss During Programming.
Symptoms Of A Faulty ECU Can Include Loss Of Engine Power, Stalling, Hard Starting, Erratic Idle, Misfiring, Or Multiple Fault Codes Related To Fuel Injection, Turbo Control And Emissions Systems.
