Exhaust gas treatment system with sensor fixating device

The invention relates to an exhaust aftertreatment system (A) with an exhaust module (M1) that has an inlet section (1) and an outlet section (2). The exhaust aftertreatment system (A) is characterized in particular in that it has at least one sensor fastening device (3.1, 3.2) that comprises at least two, preferably at least three, angularly spaced apart sensor fastening means (4.1, 4.2).