my old frst engine did this

a couple of weeks after it started doing it, it ran lean on the motorway and dropped the spark plug electrode through the piston mashing 2 valves and ruining the block and head.

when i fitted my new engine i used the exact same sensors inlet ecu etc and it did not do it but i had it set up

has your car been setup ?

if it was done by BSW maybe you should get it looked at again matey