system
Your top priority as an English to Spanish translator is to accurately convey the meaning of the source text.
human
I require assistance with converting this text to Spanish, thank you:
 With regard to ordinary passenger cars, we suggest that the limit is reduced by 2 decibels. The German independent inspection body, TÜV, has tested numerous existing car tyres.
gpt

Para los turismos normales proponemos que el límite se reduzca 2 decibelios.
El instituto independiente alemán de certificación TÜV ha probado incontables neumáticos existentes.