EMS3XXX Chiptuning
The EMS3XXX is used in Car vehicles from makes such as RENAULT. 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 →Decat / Catalyst Delete
Software deactivation of catalyst monitoring and related codes.
View →Stage 2 Remap
Advanced software matched to hardware upgrades such as a sport exhaust or induction kit.
View →Pop & Bang
Software that creates exhaust crackle on lift-off.
View →Speed Limiter (Vmax) Removal
Removing the factory top-speed limiter from the software.
View →DTC / Fault Code Removal
Switching off selected diagnostic trouble codes (DTC) in the ECU software.
View →EMS3XXX chip tuning and remap solutions
The EMS3XXX is an engine control unit used in cars from makes such as Renault. Prime Chiptuning always builds EMS3XXX files from the original read of the vehicle; generic files are not used.
Solutions offered for this ECU family include Stage 1 Remap, Decat / Catalyst Delete, Stage 2 Remap, Pop & Bang, Speed Limiter (Vmax) Removal 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 EMS3XXX remap is done
- The EMS3XXX 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 EMS3XXX
Our service points tune the EMS3XXX for each vehicle individually, with support after delivery. Workshops with their own tools can order EMS3XXX files on the ECU Prime file platform.
Are you a tuner or dealer?
Verified Stage 1, DPF, EGR and AdBlue files for the EMS3XXX are available on the EcuPrime file service: upload your original file and compatibility is measured in seconds.
EMS3XXX files on EcuPrime →Notify me when a new EMS3XXX solution is released
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