It's here! Today (30.10.2026), Magicmotorsport released FLEX version 8.28.0.0 with support for the Kefico SIM2K-510 ECU via OBD. This is the ECU found in 1.6 CRDi diesels in Hyundai and Kia models from 2017 onwards, where workshops have been stuck until now – there was no solution via the diagnostic port. Now you simply connect the OBD cable, download the Virtual Read, modify the file and write it. The protocol is included in the FLS0.1 and FLS0.5 packages, so if you have an active subscription, all you need is a software update.
Key information:
- Kefico SIM2K-510 via OBD – Virtual Read, write and checksum without opening the ECU.
- Real read on the bench (OBD on Bench) – when a Virtual Read is not yet available for a given software version.
- Automatic ECU unlock in the first step of the procedure, in both modes.
- CAN-FD versions also supported – the FLX4.4 adapter is required for writing.
- License: FLS0.1M/S or FLS0.5M/S – the protocol is included in the ECU OBD + Bench package and in the Full package, for both Master and Slave.
- Solution available only in FLEX – Magicmotorsport describes it as "Flex exclusive".
What is the SIM2K-510 and why is this release important?
The SIM2K-510 is a Kefico (Hyundai Group) engine control unit fitted to Hyundai-Kia 1.6 CRDi diesels, including mild hybrid (MHEV) versions. You'll find it in the Hyundai Kona and Tucson NX4, as well as the Kia Ceed, Sportage NQ5 and Stonic, among others – cars that are arriving at Polish workshops in large numbers.
The problem was that for a long time no programmer could read or write this unit via OBD. A customer with a Tucson 1.6 CRDi wanting Stage 1 left the workshop empty-handed, or the car went to someone who had a bench solution and plenty of time. As of today, FLEX puts this issue to rest – and via the diagnostic port.
How does it work in practice?
OBD mode – connect, download, write
- Connect FLEX to the car's OBD port.
- Download the Virtual Read – the original file for the given software version, with no physical ECU read.
- Modify the file (yourself, or through your Master if you work on a Slave).
- Write it via OBD. The checksum is calculated automatically.
Approximate times given by the manufacturer: connection approx. 30 seconds, read approx. 5 minutes, write approx. 10 minutes.
OBD on Bench – real read
If a Virtual Read is not yet available for your unit, you perform a real read on the bench: connect the ECU according to the diagram in the FLEX instructions and read the memory directly. The ECU is unlocked automatically in the first step – no manual "unlock", no soldering.
CAN-FD versions
Newer SIM2K-510 units communicate via CAN-FD. These are supported too: you perform the real read according to the diagram in the instructions, and for writing you need the FLX4.4 CAN-FD adapter. If you work on new Hyundais and Kias, it's worth keeping one in your case.
Examples of supported vehicles
| Vehicle | Engine |
|---|---|
| Hyundai Kona (I) OS, from 2017 | 1.6 CRDi 16v MHEV 134 HP |
| Hyundai Tucson (IV) NX4, from 2020 | 1.6 CRDi 16v 114 HP |
| Kia Ceed (III) CD, from 2018 | 1.6 CRDi 16v 134 HP |
| Kia Sportage (V) NQ5, from 2021 | 1.6 CRDi 16v MHEV 134 HP |
| Kia Stonic (I) YB, from 2017 | 1.6 CRDi 16v 114 HP |
Which license do you need?
The SIM2K-510 protocol is available in two FLEX software packages:
- FLS0.1M / FLS0.1S – the passenger car ECU package in OBD and Bench mode,
- FLS0.5M / FLS0.5S – the Full package, i.e. the entire list of FLEX vehicles and controllers (ECU and TCU, OBD, Bench and Boot).
Do you have a FLEX with an active subscription to one of these packages? Update the software to version 8.28.0.0 and the protocol is yours – at no extra cost. If your subscription has expired, you'll need to renew it to download the update. Working as a Slave? The protocol works the same way, and your Master handles the file modification. If you're not sure which working model is right for you, read our article Master or Slave programmer?
Don't have a FLEX yet?
SIM2K-510 is yet another reason why FLEX is today the most actively developed programmer on the market. In our store you'll find all configurations:
- FLEX Full Master Programmer – the full FLS0.5M package, all protocols, your own file modifications.
- FLEX Master + ECU OBD + Bench protocols – the FLS0.1M package, which includes SIM2K-510 as of today.
- FLEX Full Slave programmer – the full list of protocols, files are modified by your Master.
- FLEX Full Slave in the szarbi.net network – you read and write, we prepare the files.
Each of these programmers can also be purchased in installments or through business leasing – you'll find the calculator on the product page under the “Calculate Leasing installment” button. More in the article We have implemented LeaseLink.
Questions about SIM2K-510?
Not sure whether your FLEX and license cover the new protocol, or want to check a specific Hyundai or Kia vehicle? Write to us – send the model and VIN number, and we'll reply before you buy. If you work in the szarbi.net network, we're preparing files for SIM2K-510 starting today.
Source: Magicmotorsport, SIM2K-510 Hyundai KIA – Flex Update, 30.10.2026.
