Hyundai H350 2015–2021
2.5 CRDi170PS·422Nm·Diesel
We don’t tune the H350 2.5 CRDi yet.
One email the day it lands. Nothing else.
It’s deep engineering — and the hard part is unpredictable, so we can’t promise a date.
The ECU is locked down by security and signature checks — we have to get past them before it will accept a map that isn’t the manufacturer’s. It’s the least predictable part of the job.
Developing and dyno-proving the tune for your engine — never a generic file.
Safe by design, reversible by default
Tuning isn’t risky when it’s done right — the same calibration a good workshop would load, with the same safety margins.
- Your factory file, always on handWe keep a database of original OEM files, so your factory file is always there to restore — even if your ECU’s memory can’t be read.
- An interrupted flash is recoverableIf a write is interrupted, the ECU simply stays in programming mode, ready to resume. Once the flash completes, your vehicle starts normally — no permanent damage.
- One-tap return to stockRestore your factory file anytime — for a service, an MOT, or selling the vehicle.
- Within safe limitsYour tune is built by experienced engineers to stay inside your engine, turbo and clutch tolerances — never past what your hardware can take long-term.
Every map is calibrated by ActiveMotion, a professional tuning house that has tuned tens of thousands of vehicles. Available right in the app.
- 10+ yearsin engine software & calibration
- Every enginedeveloped on the dyno
- Custom-builtnever a generic file
- Reversibleback to stock anytime
Order, install, drive — anytime, anywhere
Order & get the dongle
Select what you need, check out. Your OBD dongle ships within a working day.
Plug in & install
Plug it into the OBD port and install your tune from the app — minutes, no workshop.
Drive — revert anytime
Enjoy the gains, and go back to stock whenever you like.
Drivers like you, already on it
“Great product, attentive — I recommend this company, truly very professional. The system is fabulous.”
“An easy, effective and fast remap. I'm very happy and don't regret my purchase.”
“Very easy to set up. Reprogramming your car with your smartphone is now possible, and you can restore the original map in 2 minutes if you want, without going back to a remapping shop. I recommend.”
“Really great! Effective, fast and affordable. Responsive team. The torque gained on my Touran lets me tow my caravan much more serenely for holiday departures.”
“Incredible — someone had to think of it: with a simple dongle, like a USB key, you can program your car, go back to stock, and so on, and it works perfectly well. Child's-play easy. Thank you.”
“Very good experience — the system is very well made. Keeping the original car and being able to change the programming as you wish is great. Still lacks a bit of punch off the line, which comes in later. Staff very available and attentive. Thanks.”
“Not convinced right away, but the change is real — the car overtakes much more easily even loaded, and consumption is lower driving the same way.”
“A team that listens, with real know-how at the service of others. The process is simple and effective. I recommend it to anyone who wants to perform……”
“Very good company with exemplary responsiveness! Thanks Théo for your precious advice, always attentive! I recommend 200%!!! Thanks again, team! 👍”
“Despite a delivery delay on the dongle, the remap is top-notch — blown away by the technology. I recommend.”
“I was looking for a simple way to boost my Porsche 718, 300 hp. I first looked at piggyback boxes, but quickly gave up: engine access is far from easy (about an hour of removal and refitting), I want to be able to return the car to stock quickly if needed, and that solution is frequently criticized. The second option was taking the car to a specialist for a Stage 1 — but having to book again to restore stock before each dealership visit felt heavy and costly. I finally stumbled on this solution, which lets me do the whole thing autonomously and quickly. This innovative approach intrigued me and, of course, raised questions… what if it didn't work? I talked at length with Chuck and Théo, peppering them with technical questions as a former IT guy. I was welcomed with real kindness and their many answers were extremely consistent — at no point could I catch them out. I ordered and set up my Boxster 718: the stated gain is 70 hp and +80 Nm. The update worked wonderfully — the Boxster ran well before, but now it's something else entirely, a true pleasure… I especially appreciated the after-sales contact with Théo, who again patiently answered my convoluted questions. Frankly, top service and a system that works…”
“Stage 1 E85 + pops and bangs on my RS3 8V. Noticeable power gain and running on E85 without any issue. I find the pops and bangs don't last long enough (about 1 second). Apart from that, very satisfied with this remap.”
“I'll give an objective review: I remapped my Clio TCe 90, a sluggish little engine to begin with. The remap worked well — I can definitely tell the difference from stock even if it's no rocket. To be precise, I went from 0–100 in 14.4 seconds to 13.5. Not exceptional, but where the car really gained is mid-range pull, especially in 4th and 5th — it picks up much better; it just lacks a bit of low-end torque. We'll see with ethanol since I took the FlexFuel option and I'm currently running SP98. My experience is quite positive and the technical team listens — a bit hard to reach on chat at times, but responsive by email. In the end I'm satisfied because I can go back to stock whenever I want. Thanks — it's great to be able to do the remap yourself.”
“Perfect, fast, good value for money, plenty of options and bonuses, and you can go back to stock whenever you need. Just a fairly long wait for my remap to be sent, but I recommend.”
Questions, answered
Is it safe?
Is there any risk for my engine?
Manufacturers de-tune engines at the factory to cope with poor fuel quality in some parts of the world and to meet strict emissions rules — so there’s real performance left on the table.
Our maps are built by powertrain engineers to unlock that reserve while staying inside your engine, turbo and clutch tolerances: software optimisation, same hardware. And it reverses to stock anytime.
Can an interrupted flash brick my ECU?
No — an interrupted flash can’t brick your ECU. Flashing is all-or-nothing: if the write is cut short — a flat battery, a dropped Bluetooth link, the dongle pulled out — the ECU won’t run a half-written program. Instead it stays in programming mode (its bootloader), waiting for a complete file.
While it’s in that state the vehicle won’t start, which can look alarming but is completely safe: nothing is damaged and nothing is lost. You simply reconnect and re-run the flash — SmartFlash is engineered to recover from any state, finish writing, and the engine starts normally.
As a safety net, we also keep your factory file on hand, so you can always write the vehicle back to stock.
Will it void my manufacturer warranty — and is it detectable?
We’ve built the solution so that, once you flash back to stock, it’s usually not visible to a manufacturer — though OEM tools evolve, so we can’t promise that forever.
And to void a warranty on tuning grounds, a manufacturer has to actually prove the vehicle was tuned. A tune can still affect warranty cover, so it’s worth knowing your maker’s terms.
Will it affect my insurance?
It depends on your insurer and country, so we can’t give one global answer. Remember the tune is fully reversible to stock.
Is tuning legal?
It depends on your country and how you use the vehicle — laws differ across the markets we serve, so you’re responsible for checking your local rules. Either way, you can always flash back to stock.
Does it suit an older or high-mileage vehicle?
It can, as long as the engine is healthy and well-maintained — tuning rewards a vehicle in good condition, it won’t revive a tired one. Sort any wear or due service first.
Do I need a healthy battery to flash?
Yes. Flashing draws power for several minutes and the engine can’t be running during programming, so a healthy battery matters — and if yours isn’t in great shape, connect a charger. The app walks you through it; just don’t interrupt the process.
Flashing & the app
Can I switch between the tune and stock whenever I want?
Yes. Your original file is stored, so you can flash to stock and back to your tune in a few minutes from the app, as often as you like — handy for a service, an MOT, or selling the vehicle.
Is the tune really tailored to my vehicle?
Yes — never a generic file. Every map starts from a calibration developed on the dyno for your engine, by powertrain engineers.
You pick the stage and options, and it’s then adapted to your exact ECU software version.
How does this compare to a workshop remap?
It’s the same kind of calibration a good workshop would load — built by powertrain engineers — but without the day without your vehicle or the workshop price, and you install it yourself from your phone.
Unlike most workshop remaps, it’s fully reversible anytime.
How do you calculate the gains?
From dyno data for your engine family. Where we show a modelled curve, it’s labelled as such — what a healthy vehicle on the right fuel should make; your exact numbers depend on your vehicle’s condition, fuel and any hardware.
What does the gearbox tune do?
On automatic and dual-clutch boxes it sharpens and firms up the shifts, raises the torque limiter to hold the new power, quickens kickdown and launch, and removes factory shift restrictions.
It’s a separate optimization from the engine map.
Will more power increase my fuel consumption?
Not necessarily. Driven the same way — especially cruising — many customers see similar or even slightly better economy, because the engine works less for the same result.
Use the extra power often, though, and it’ll drink more, as you’d expect.
Does it work if my vehicle is already tuned or modified?
It depends on your ECU. Where we can fully read its current memory, we can back up an existing tune as a separate map you can keep and install whenever you like.
But our own tuning always starts from a clean factory base — we won’t graft options onto someone else’s map, since we can’t vouch for that work.
So if you have a Stage 1 from another tuner, we can save it for you — provided, as above, that the ECU’s memory can be read; but to get Stage 1 + Pops & Bangs as one of our maps, you’d take Stage 1 from us too (we can always build Pops & Bangs as its own map).
Stages, maps & options
Do higher stages need any hardware changes?
Some do. Stage 2 needs an exhaust change — on diesels the DPF must be physically removed, on petrols the catalytic converter (and the GPF if fitted). The configurator flags this when you pick Stage 2.
Stage 1 is software-only.
Can I add stages or options later?
Anytime. Add any stage or option later for its normal price — you won’t re-pay for the vehicle you’ve already set up — then a €49 build-or-update fee to roll it into a new map or update your current one.
I'm selling my vehicle — can the new owner keep my tunes?
Yes. We offer a transfer of your maps to the new owner's account, for the same vehicle (same VIN), for €99. Everything you had bought for that vehicle becomes available to them — they'll just need an OBD dongle to install it.
If you prefer, restore the vehicle to stock before the sale — free, a few minutes in the app. Either way, remember to tell the buyer if the vehicle is sold tuned.
Can I have more than one map for the same vehicle, and switch between them?
Yes. Everything you buy stays in your toolbox, and you can build several map variants from it — one with Pops & Bangs and one without, an everyday map and a full-power one.
There’s no on-the-fly switching in the app yet (it’s on the roadmap), so you switch by reflashing — a few minutes. Your first map is included; each extra is a €49 build.
The dongle & delivery
How soon do I get my tune file?
Once you’ve registered your vehicle in the app, most tunes are ready within hours — never more than one working day. You’ll be notified when your tune is ready to install.
When does the OBD dongle ship and arrive?
Dongles ship from our EU warehouse within one working day — same day if you order before midday — and arrive in 1 to 5 days depending on your country and whether you pick standard or express.
Exact delivery times show at checkout.
Where do you ship?
Anywhere in the EU.
Can one OBD dongle be used on several vehicles?
Yes. The dongle is just the plug-in interface between the app and your vehicle — it isn’t tied to one vehicle, so a single dongle works on any vehicle you own.
You buy it once; each vehicle has its own tune.
Guarantee
Do you offer a warranty?
Yes. We stand behind the calibration itself, and if your manufacturer later pushes a software update to your vehicle, we re-do your tune for free.
Every order also comes with our 30-day money-back guarantee, and the tune is always reversible.
How does the 30-day money-back work?
Within 30 days, flash your vehicle back to stock and send the dongle back to us in its original box and condition.
Once we’ve confirmed the vehicle is on its factory file and the dongle has arrived, we issue your refund.
Want in? Be first in line for the H350 2.5 CRDi.
Leave your email — we’ll tell you the day it’s ready, with 20% off for waiting.