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Chiptuning files » ECU and TCU » Bosch MED17.1.21 » Catalyst off

Catalyst off for Bosch MED17.1.21

Catalyst monitoring by the lambda (O2) sensor is switched off so a sport catalyst or decat does not raise fault codes.

Catalyst off files for vehicles with Bosch MED17.1.21

14 of the 14 vehicles with this unit

Vehicle	Generation	Fuel	Power
A1 1.4 TFSI (COD)	8X Facelift 2015 2018	Petrol	150 hp
A3 1.4 TFSI E-Tron	8Y 10/2020 2023	Petrol plug-in hybrid	204 hp
A3 35 TFSI (1.4T COD)	8V Mk3 2019	Petrol	150 hp
A3 1.4 TFSI (COD) (2016 - 2017)	8V Facelift 07/2016 2020	Petrol	150 hp
A3 40 e-Tron (1.4T PHEV)	8V Facelift 07/2016 2020	Petrol plug-in hybrid	204 hp
A3 40 TFSIe - (1.4T)	8V Facelift 07/2016 2020	Petrol plug-in hybrid	204 hp
A3 1.2 TFSI	8V 2012 2016	Petrol	110 hp
A3 1.4 TFSI COD (2014 - 2016)	8V 2012 2016	Petrol	150 hp
A3 2.0 FSi	8P 2003 2008	Petrol	150 hp
A4 1.4 TFSI	B9 07/2015 2018	Petrol	150 hp
A5 1.4 TFSI	F5 2016 2019	Petrol	150 hp
Q2 1.4 TFSi	GA 2016 2020	Petrol	150 hp
Q3 1.4 TFSI	8U Facelift 2015 2018	Petrol	125 hp
Q3 1.4 TFSI	8U 09/2011 2014	Petrol	150 hp

Other modifications for Bosch MED17.1.21

Engine performance

Stage 1 Stage 2 BASE Stage 3 BASE E85 or other special fuels modification Flex fuel mod for E85 or other fuel types Anti lag Torque monitoring off

Sound and driving

Pops and bangs Hardcut limiter Exhaust flap control/off Cold start off - Catalyst heating off Start/Stop System Off VMAX speedlimit on/off higher/lower Idle RPM Mod

Deactivations and fixes

DTC off EVAP off SAI off Cylinder On Demand off Readiness ok Checksum Correction

Immobiliser and cloning

Results vary per vehicle, and what is possible can differ per software version. This applies to every modification we deliver, for the ECU and for the TCU. Upload your original file to check what is available for your vehicle.

For motorsport and off-road use. Check the rules in your country before using this on public roads.

Read tools

Autotuner: Bench, Boot, OBD
Magicmotorsport FLEX: Bench, Boot, OBD

Also listed: Alientech KESS3, Alientech KESSv2, Flashtec CMD, Dimsport New Genius, Dimsport New Trasdata, ByteShooter Toolbox.

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Catalyst off for other units

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