Bosch MED17.1.21 ECU Tuning
Engine control unit used in 26 supported models from 4 makes.
Audi with the Bosch MED17.1.21
All Audi tunesSEAT with the Bosch MED17.1.21
All SEAT tunes- SEAT Alhambra2015+1.4 TSI/TFSI S&SAutoTuner
- SEAT Arona2017+1.4 TSI/TFSI S&SAutoTuner
- SEAT Ateca2016+1.4 TSI/TFSI S&SAutoTuner
- SEAT Ibiza2008+6J · 1.4 TSI/TFSI S&SAutoTuner
- SEAT Leon2013+5F MK1, 5F MK2 · 1.4 TSI/TFSI S&SAutoTuner
Skoda with the Bosch MED17.1.21
All Skoda tunes- Skoda Karoq2017+1.4 TSI/TFSI (US), 1.4 TSI/TFSI S&SAutoTuner
- Skoda Kodiaq2017+I · 1.4 TSI/TFSI S&SAutoTuner
- Skoda Octavia2013+1.4 TSI/TFSI (US), 1.4 TSI/TFSI S&SAutoTuner
- Skoda Superb2015+1.4 TSI Hybrid, 1.4 TSI/TFSI S&SAutoTuner
Volkswagen with the Bosch MED17.1.21
All Volkswagen tunes- Volkswagen Arteon2020+1.4 TSI HybridAutoTuner
- Volkswagen Golf2012+VII MKI, VII MKII, VIII · 1.4 TSI GTE, 1.4 TSI/TFSI (US), 1.4 TSI/TFSI S&S, 1.4 TSI/TFSI S&S ACTAutoTuner
- Volkswagen Golf Sportvan2014+1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Jetta2010+1.4 TSI Hybrid, 1.4 TSI/TFSI (US), 1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Lamando2015+1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Passat2015+B8 · 1.4 TSI GTE, 1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Polo2014+6C1 · 1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Sharan2015+1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Tayron2018+1.4 TSI GTEAutoTuner
- Volkswagen Tiguan2016+1.4 TSI/TFSI S&SAutoTuner
- Volkswagen Touran2016+1.4 TSI/TFSI S&SAutoTuner
About Bosch MED17.1.21 tuning
The Bosch MED17.1.21 engine control unit is supported in 26 models from Audi, SEAT, Skoda, Volkswagen. We read, modify, and flash it with AutoTuner, then verify the result on our Dynojet 424xLC2 in Jenison, MI. A custom calibration optimizes fueling, ignition timing, boost, and torque limits for your exact build.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.