It has been the elephant in the room this since the VAG emissions story broke. It's a perfectly plausible idea that they were all in it together. What made me suspicious was the lack of any other car makers attempts to capitalise on VAG's weakness, they just got all defensive saying we have not broken any laws which was exactly what VAG were saying. None were saying come buy our cars because they are clean. It could well involve more than the German makes, French, Italian and Japanese makes seem to be doing very similar things. There are a vast number of firmware updates going on under the radar. I would not be at all surprised if the UK governments reluctance to actually do anything is their attempt to protect our own domestic car makers from the same fate as VAG.
All we're seeing is different responses to them all getting caught - Opel/Vauxhall seemed to grasp the issue first and changed the spec for those affected and offered retro-fixes - but from where I am, with a VW, I can't name a brand that's beyond reproach for their diesel emissions - the cynic in me would suggest that any brand not yet accussed simply hasn't been found out yet!
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