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      05-14-2018, 03:15 AM   #12
HighlandPete
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Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

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Quote:
Originally Posted by psp888 View Post
I had mine done a few weeks ago after my EGR failed. I've actually been getting better MPG, constantly over 54+ mpg where as before it would be just under 50.
Not surprised to see a positive result among the negative comments.

Depending on the mode of failure, we can expect both better or less mpg. Those now seeing lower mpg may have been running with less EGR and more NOx emissions.

If the failure mode is giving too much EGR, a new EGR valve with values within tolerance, better mpg may well result.
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