i think it will need modifying
as the zafira bonet is deeper at the front than astra grilles are different zafira one is bigger than the astra
i tried zafira gsi grille for my astra but was too big so the wife got it lol
front bumper is also deeper on gsi so if cars lowered think it will scrape as the zafira has higer ride height
like i say with modding recon it could be made to fit