Wing mirror sharing.

Alfa Romeo GTV and Spider (1993) mirrors shared with Maserati Quattroporte IV, phase 1b (1996). No modifications.

Alfa Romeo 166 (1996) mirror shared to Maserati Quattroporte IV, phase 2 Evoluzione (1998); Maserati 3200 GT (1998), Maserati Spyder (2001), Maserati Coupé (2002), Maserati GranSport (2004) and Maserati GranSport Spyder. That is six models from Modena with this wing mirror design. New base on Quattroporte IV, some modifications on rest of the Maseratis for steeper angle.
 

Lancia Thesis (2001) mirrors shared with Maserati Quattroporte V (2003). No modifications.

Alfa Romeo 159 (2004) mirrors shared with Maserati Quattroporte V facelift (2008), Maserati GranTurismo (2007), Maserati GranCabrio, Alfa Romeo Giulietta (2010) and Alfa Romeo MiTo (2008). Possibly longer stems on Maseratis and different bases on Alfas.
 

Fiat Croma II (2005) mirrors shared with Lancia Delta III (2008), Lancia Ypsilon III (2011) and Fiat Bravo II (2007). No modifications.

Fiat Grande Punto (2005) mirrors shared with Alfa Romeo 4C (2013), Alfa Romeo 4C Spider, Fiat Linea (2007), Fiat 500 (2007), Fiat Punto Evo (2009) and Fiat Punto (2012).