Diesel is 5 wheel nuts, and yes you are right , on the chevrolet website shows the 4 wheel nut wheels.. Now wondering if they've nicked the 1.3 astra drivtrain for the aveo diesel. Profound apologies for error, but if you have 4 nuts, then maybe the old aveo wheel will fit. I got one (alloy) with a decent tyre for £60 from a scrappie. 2009lt1.4