If I get down voted for this commenting against the grain, so be it, but here goes:
I believe that the reason the car companies oppose this is the speed at which it's being pushed. Not that the regulations need to happen.
My understanding is that it takes a car company 3+ years to design / engineer a vehicle to meet the market standards and regulations. It's not an overnight process. So the car companies want this to be delayed to give them time to be in market with vehicles that comply with the new regulations.
On one hand, their investment opportunities are limited. As a normal pleb the most they can do is buy an investment property. Stock market is pretty sketchy and limited to those with decent cash, so it leaves just real estate which is why so much gets pumped into it.
Then on the other side you have population decline. China is literally fucked from old age people and the preference to having a son. More women there also don't want to deal with the entitled little emperor, so they don't get married also. Population is on track to hit 500bill in 2100 (down from 1.4T at its peak). All those billions missing don't need apartments.
They knew that when doing the testing, the car would be on a rolling road inside, and usually when they do that they have the car doors open to let air go into the cabin and to talk to people etc.
So they programmed in a rule that "if the car is doing 100kph, and the door is open, change engine map to use more fuel and output less emissions".
Because it was extremely unlikely someone would have the car door open and doing 100kph in any other circumstances.
If I get down voted for this commenting against the grain, so be it, but here goes:
I believe that the reason the car companies oppose this is the speed at which it's being pushed. Not that the regulations need to happen.
My understanding is that it takes a car company 3+ years to design / engineer a vehicle to meet the market standards and regulations. It's not an overnight process. So the car companies want this to be delayed to give them time to be in market with vehicles that comply with the new regulations.