I went looking for the numbers again.
In my case, I believe my MY12 Mk6 GTD is expected to meet Euro 4 limits, which (for NOx) is 250mg/km. Euro 5 is 180mg/km, Euro 6 is 80mg/km. https://www.comlaw.gov.au/Details/F2...#_Toc276984498
The lowest figure I could find for Californian emissions was 50mg/mile, or about 31mg/km (after 50,000 miles / 5 years). California: Light-duty: Emissions - Transportpolicy.net
These are for a standardised laboratory test, and I don't think anybody who understands emission regulations truly expects vehicle emissions to be below these limits in the real world. So any journalist beating up a story about vehicles in the real world emitting twice the laboratory limit is an ignoramus. But up to 40 times the limit is beyond a joke. Somewhere in between would be a "reasonable" result for real-world performance.
I couldn't find absolute mg/km readings from the tests that started this debacle, but I'll assume the media have done their best to beat this up. Working on the lowest Californian "limit" I could find, and using the worst case 40x factor that has been quoted, I'll guess the highest figure they ever measured was about 1200mg/km.
Compared to the Euro 4 limit my GTD is supposed to achieve, that's nominally 4.8x the laboratory limit. For later vehicles, that were supposed to meet Euro 5 limit of 180mg/km, that multiplier is a little over 6.5x. Is that "reasonable" for real-world vs laboratory? I guess Volkswagen will be making the claim that these numbers are reasonable (in Australia, given Australian regulations), in which case the Australian delivered vehicles comply with the intent of the Australian Design Rules, and therefore nothing is wrong.
If they win this argument, then the class action(s) may fail.
The fact that they claimed ADR compliance (via the relevant Euro limits) using fraudulently obtained laboratory test results is a different issue, which is between Volkswagen and the Australian government.
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