Hi Jan,
Sure, here's the translation:
"Here's some more information:"
The emission control code can be changed, but only with an emissions test report or a manufacturer's certificate.
So, if you're installing a diesel engine into a gasoline-powered car body and have a manufacturer's certificate stating that the vehicle is then in a defined, standard condition, the emissions key number will also be changed. However, the TSN (Vehicle Identification Number) and HSN (Engine Identification Number) will remain the same, as they are not allowed to be altered.
Here's something else... Regarding parts relevant to emissions, things like tires, the exhaust system, and the transmission also count. In the case of a G3 conversion from 1Z to ALE, this isn't really a problem. All these parts were available as standard equipment, and a manufacturer's certificate would be possible (if the manufacturer would provide such a document). However, if you want to equip an Audi 80 with the technology from an A4, things get tricky, especially when it comes to the exhaust system.
