Did you keep close track of your mileage pre-tune? and after? Very curious any significant changes? Thinking of installing polestar on my 07 xc? Can't believe it doesn't affect mileage?? Any other observations appreciated!

Thanks!

If by on board computer, you are refering to the central electronic modual or "cem", that seems to be a more common and recurring issue with some models possibly mostly 2004 models? My xc70 has this failure only after longer 5-7 hours of driving and has never occured otherwise. Most of the...

Help! 2004 xc70 58k and 98% of the time runs perfectly...except on one section of hwy about 2.5 hours into a 5 hour highway drive. This same section of highway in the opposite direction has never reproduced the failure. But this failure (cem) occured 3 times within 20 miles of the other failures and...