They just need to keep defect ticket histories.
Third strike for the same defect on the same vehicle, you lose it. Fuck this ‘keeping a stock spare and swapping it in’ shit.
Why so soft?
The vehicle seems to loud -> perform a check -> if it is too loud, confiscate to have it examined and fine the driver -> if vehicle is found to have been tampered with using illegal parts, don’t return it and fine some more
Then bring it back into a legal state and auction it off anonymously