Quote:
Originally Posted by Chelsea_Tractor
It's a faulty batch of EGR coolers. Massive thread about it on the UK F30 board. Back log of parts on order slowly clearing. I stress, slowly. If your cooler is not suspected then everything else gets checked over anyway so in your case the cooler may be fine but the o-ring is to be replaced.
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What was wrong in the design of the cooler? or what are they looking out for?
If everything is functioning properly, what o-ring is being replaced then?