if you have a new facelift uk model you might need bosch plugs... as i found out... just thought id share that lol but judging by your name "march lx" that wont concern you anyway
the plugs are NGK and the code is BKR5ES-11. changed mine a few days ago with the wrong plugs, some ACDelco ones. the cg13 was struggling hardcore. then switched them back to the NGKs and i must've dropped one coz plug 3 had no gap. firing on 3 cyls and was struggling just as hard. but after we gapped it again it was fine
Yeah I think I used to have the iridium tipped ones (same fitment as Nissan Maxima), but now I just have the regular NGKs that the micra comes with factory. Work fine, my ignition system has never missed a beat, including factory dizzy.