DELPHI DCM3.4 Chiptuning
The DELPHI DCM3.4 is used in Car, Truck & Bus vehicles from makes such as RENAULT, DACIA, CITROEN, PEUGEOT. Our library holds verified solution files for this ECU family.

Available operations
Stage 1 Remap
Software that optimises the engine's power and torque maps within safe limits.
View →DPF Delete
Software deactivation of the diesel particulate filter (DPF/FAP) functions and fault codes.
View →EGR Delete
Software deactivation of the exhaust gas recirculation (EGR) valve control and fault codes.
View →DTC / Fault Code Removal
Switching off selected diagnostic trouble codes (DTC) in the ECU software.
View →DCM3.4 chip tuning and remap solutions
The Delphi DCM3.4 is an engine control unit used in cars and commercial vehicles from makes such as Renault, Dacia, Citroen, Peugeot and Nissan. Prime Chiptuning always builds DCM3.4 files from the original read of the vehicle; generic files are not used.
Solutions offered for this ECU family include Stage 1 Remap, DPF Delete, EGR Delete and DTC / Fault Code Removal. Which ones apply to your vehicle depends on the exact ECU variant, software version and engine; we check this from the read file before the work starts.
How a DCM3.4 remap is done
- The DCM3.4 is read by OBD, bench or boot depending on the variant, and the original software is backed up.
- The original file is modified for the vehicle, engine and requested solution; the checksum is corrected.
- The file is written, fault codes are checked and the vehicle is road tested.
- The original backup is kept, so the vehicle can be returned to factory software at any time.
Why Prime Chiptuning for DCM3.4
Our service points tune the DCM3.4 for each vehicle individually, with support after delivery. Workshops with their own tools can order DCM3.4 files on the ECU Prime file platform.
Are you a tuner or dealer?
Verified Stage 1, DPF, EGR and AdBlue files for the DELPHI DCM3.4 are available on the EcuPrime file service: upload your original file and compatibility is measured in seconds.
DELPHI DCM3.4 files on EcuPrime →Notify me when a new DELPHI DCM3.4 solution is released
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