Car: MY13 1.8 EX Auto
Join Date: 7th January 2007
Location: West London
Thanked 1,708 Times in 1,431 Posts
The only time you will/maybe suffer a few warnings is when you need just one new tyre.
My theory is that as the new single tyre wall beds in, softens/flexes, the rotation does change a little and is often enough to trigger a few warnings.
I had a new single tyre on my 59 plate 8G and I got a warning almost immediately because the muppets at Ruislip Honda set the pressure to 39 instead of 30. Once corrected and re-initialised it went off again at ~100 miles and again at ~300 miles.
My daily journey, after init, was 21 miles so the required 15 miles was well covered.
After that it was fine.
If you replace all 4 tyres then the tyre wall flexing affects all 4 and a single init should be enough.