With Germany's largest company by revenue, Volkswagen, deep in damage recovery mode, and the market still unable to decide just howsystemic and profound the fallout will be from the emissions scandal which has already cost the job of VW's CEO and which according to some will impact the GDP of Hungary and the Czech republic as much as -1.5%, many are still trying to determine not if but how many other companies - whether "clean diesel" focused or otherwise - will be impacted by the crackdown on emissions fraud.
We don't know the answer suffice to speculate that it will be "many" for one simpler reason: there are dozens of ways to manipulate emissions tests in both the lab and on the road, and with the temptation to "reduce" emissions all too great for management teams laser-focused on boosting profit margins, one can be certain that in this particular case not only is there more than one cockroach, there are dozens.
The chart below from Transport and Environment shows some of the traditional ways in which carmakers manipulate CO2 emissions tests to make their cars appear more efficient:
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