Hi - am new to the forum but a regular on other bmw sites.

Just picked up a 2004 4.8 (N62) E53 X5. It has 103,000 miles and the original O2 sensors. Car runs fine and no codes logged on INPA or DIS, but these are "supposed" to be changed at this mileage...

Is it worth doing... (anyone have any experience of the difference in the absence of a failed component?) as cost is just shy of £400 for the Bosch sensors... Assume the new sensors might improve fuel consumption a bit - but grateful for any experiences on this before I shell out on them. Already have a parts bin of £1800 (all anticipated in the purchase) as giving it a full refresh... and swapping some perished rear bushes and links - and brakes - plus all fluids etc...

Thanks for input...!