Short answer: The VCU3000 is the central control unit in Fiat Topolino, Opel Rocks-e and Citroën Ami. Stefanel Performance is the only company worldwide that can read and write the VCU3000 in bench mode without opening the housing and without destroying the IP67 certification. This means that water and dust protection are fully maintained — typical interventions: VMAX increase, torque optimisation, firmware updates.
At Stefanel Performance, we are once again setting new standards in the field of modern electric vehicle optimisation.
We are now the only company worldwide that can read and write VCU3000 control units in bench mode without opening the housing or destroying the IP67 certification.
This technology allows us to make software adjustments directly to the engine control unit without compromising water or dust protection – a decisive advantage over conventional methods where the control unit has to be opened or damaged.
🔧 What is the VCU3000?
The VCU3000 (Vehicle Control Unit) is the central control unit for many modern electric micro-vehicles.
It controls all dynamic driving parameters – from torque management and power limitation to top speed (VMAX).
The following vehicles are equipped with the VCU3000:
Fiat Topolino
Opel Rocks-e
Citroën Ami
⚙ Our Innovation: Bench mode without risk
Other providers have to open the control units to make changes – often losing the IP67 sealing, which makes the control unit susceptible to moisture and corrosion.
With us, access is completely closed and residue-free, using a specially developed bench mode and a specially calibrated communication interface.
The result:
No opening, no risk
No loss of manufacturer's warranty due to housing damage
Secure read and write process
Compatible with all common VCU3000 software versions
Typical applications
VMAX optimisation: Increasing the speed, which is severely limited ex works
Torque optimisation: Noticeably better acceleration
Software updates: Elimination of restrictions due to faulty or outdated firmware
📦 Process
The control unit is sent to us.
We carry out the adjustments in bench mode.
After completion, we send the control unit back fully functional – with no visible interventions.
