RSTuner Kit

RSTuner Diagnostics & Programmer kit
Close-up of standard RSTuner model.
Sales price 229,00 €
Pictured with USB and OBD cables.
LEDs showing connection status.
Top right: Pro / Premium model with detached I/O plug.

The RSTuner kit allows you to unlock your Renault's hidden power.

Simply plug the interface in between your laptop and your car's OBD diagnostics port, and within minutes you can upload one of our performance maps to give you additional engine horsepower. No cutting, wiring, or other such modifications, simply plug-and-play and enjoy the unlocked performance.


Fastchip Stage1 map is included with every purchase that will give instant performance gains between 1-40 Horsepower (depending on the car type) , over stock levels.
Our included Stage 1 map will NOT lock your ECU ! Unless you request us to do so (to prevent dealer overwriting for instance)


Also gives you the ability to easily change maps as you upgrade to new parts for your car. All possible with a few mouse clicks with the RSTuner kit!

Our staged maps are developed in house and tested on a Dynojet single roller rolling road, to guarantee top quality.


For details and images of the products included in this kit, please see:


RSTuner software project page


VCI hardware project page


User Requirements

  • Familiarity with standard Windows based software applications. [PC/laptop needed]
  • RSTuner is provided on the understanding that the user appreciates and understands the responsibilities in regards to reprogramming the ECU.
  • User must have a good knowledge of the English language as the software comes in an English version only !


RSTuner Pro

Our Pro model accepts up to 4 external sensors (0-5 V) such as Wide Band sensors, right into our auto-scaling Live Data datalogger. You will have real time data from those sensors integrated with your standard engine ECU Sensor Data for easier understanding.


RSTuner Premium

The Premium model comes with a built-in 'Flight Data Recorder' which can record many hours of engine live data without the use of a laptop, simply by pressing the control button. During trackdays all data can be recorded and later reviewed at home from your PC. External trigger port can be set to every available live data parameter. This way it can be set up to be a shift light, knock warning light or an IC waterspray trigger. Or anything else that you find useful.



RSTuner model comparison chart

RSTuner features Standard Pro Premium
OBD Protocol

ISO 8 / ISO 9141 / ISO 14230
CAN 15765 CAN

Reprogramming Y Y Y
Actuator test Y Y Y
DTC Fault codes Y Y Y
Performance analyzer Y Y Y
Performance calibration (single vehicle license) Y Y Y
Real-time datalogger
(csv export feature allows you to view via Excel)
Analog I/O connector
(connect wideband sensors or other)
  Y Y
Flight Data Recorder
(internal storage without the need for a laptop)
Other modules All other modules are compatible with all RSTuner variants. Visit the modules section of our shop to see all available modules to extend the functionality of your RSTuner!


What do you get? RSTuner Kit contents:

Standard Pro Premium
Fastchip VCI hardware Standard Pro with:
+analog I/O
Premium with:
+analog I/O
+internal storage
Firmware Updatable firmware
Software Latest RSTuner software
Map / calibration Fastchip Stage1 map - instant performance gains between 1-40 horsepower (depending on car type) over stock levels.
OBD-RJ45 cable Y Y Y
USB A/B cable Y Y Y
Quickstart Guide Y Y Y
Analog I/O   Y Y
Internal storage     Y
Auxillary USB car plug     Y


In short, all you need to get started with tuning your Renault!


Ordering help

Version: the type of RSTuner Kit you wish to purchase (see comparison chart above)
Vehicle: The vehicle model the RSTuner will be used on. The four characters you see listed (e.g. CB**) are the first four characters after "VF1" in the VIN. Example: VF1CB220605829478. Your VIN is your chassis number starting with 'VF1". Look onto your car registration or door sticker.
Modules: select the optional module you wish to purchase to extend the capabilities of your RSTuner (more modules are available, see the modules section in our shop for detailed information). Additional modules can also simply be added to your cart, the dropdown menu here is added for your convenience.


Friday, 21 February 2020
It's 2020 and Henk is still very much in full force. He has not only transformed the way my Clio 197 performs but has made me fall back in love with the car. For those of you who do not know who Henk is, he is the wizard behind the RSTuner. I know of his reputation from various Renault forums - His customer service is impeccable. He comes back to me within 24 hours or less and in some cases, within a few hours. His attention to detail and communication is excellent. Goes the 'extra mile' and his prices IMO are very cheap. All of this can be backed up, just check Renault forums (, etc). The Mapping - Very easy, all you need is a laptop and 10A or better battery charger. As long as you read instructions thoroughly and do everything right, you'll be fine. I initially came to Henk just before Christmas 2019 and expected to be sent a file and some instructions and I'd be on my way. Boy was I wrong! Henk required a data log (super easy to do) and then came back to me and told me that my car was already remapped. I pulled the map off the car and got it to Henk where he found the timing had been advanced (bad news!) amongst other things and supplied me with a stock map and the latest software for the ECU (free of charge!). I put the stock map and updated software on and the car was instantly better. This was not the end, though. I then supplied Henk with another data log which revealed further problems (that I was totally unaware of). Turns out my 2 of my coils were toasted as they were very old. Got these and the plugs changed and I have to say, I've had the car 2 years now, it has never performed this well! Henk then supplied me with the Stage 1 Performance map, which was applied and the result is genuinely breath taking. I'm limited to 2000 characters. To sum this up, if you have any doubts or fears about mapping, do not question the FastChip
Frank Perry
Wednesday, 26 December 2018
All the reviews are spot on. I am on my second honeymoon with my Clio IV RS again. Love your work Henk.
Joseph Samolej
Friday, 25 May 2018
First of all using RSTuner is easy and literally your kid can do it. With new calibration my clio is reborn. No flap spot, better throttle response and all together amazing results. Don't hesitate because this will change your car for better and put smile on your face. My best recommendation to everyone who ownes Renault
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