ECU Platforms

Bosch is the world's most-tuned ECU family. MED17 (petrol) and EDC17 (diesel) power most European cars built 2008-2020. MG1/MD1 generations (2018+) added stronger encryption — tuner support caught up by 2023. Vast aftermarket: EVC, KESS, MPPS, Autotuner, Bitbox, Magic Motorsport.

Siemens VDO (now Continental) ECUs are second only to Bosch in European fleets. SIMOS PCR2.1 powers VAG diesels 2008-2015. SID-series runs PSA/Ford diesels. Renamed to Continental after 2007 merger; modern variants use the Continental brand.

Delphi (formerly GM Hughes Electronics) supplies GM's E-series controllers (E38, E78, E80, E82, E92) and Korean/PSA diesel platforms (DCM3.x). E92 on the C8 Corvette and 2019+ GM trucks; DCM3.7 on Hyundai/Kia CRDi diesels.

Hitachi Automotive Systems (now Astemo) supplies Nissan's ECMs including the VR38DETT (R35 GT-R), VQ-series, and KR20DDET. Notorious for being well-protected — GT-R community uses EcuTek, Cobb, UpRev for access.

Continental (post-Siemens VDO merger) and spin-off Vitesco supply many 2015+ European vehicles. SIMK4x on Ford EcoBoost; CPC variants on Mercedes commercial; integrated drivetrain controllers on PHEV platforms. Modern variants share TriCore silicon with Bosch.

Magneti Marelli (now Marelli, owned by Calsonic Kansei) is the dominant ECU supplier for Stellantis (Fiat, Alfa Romeo, Lancia, some Maserati and Ferrari), Tata, and the Indian/SE-Asian market. IAW series on older Italian cars; MM10JF and SRA on newer.

Denso is Toyota Group's captive supplier and powers nearly every Toyota/Lexus ECU built since the 1990s. Strongly protected, slow public-tuner support. Hondata (Honda) and EcuTek (Toyota GR86/Supra) are the main aftermarket bridges.

Mitsubishi Electric ECUs ran the legendary 4G63 Evo (Evo IV-IX), 4B11T (Evo X), and many Subaru EJ-series via OEM badge engineering. Tactrix Openport + EcuFlash made these the original "open" tuning platform.