Yes, the new ciaz headlights can fit perfectly into the the older model ciaz. However the new headlights come at a price of around Rs 40,000 a pair if bought from the Maruti dealer (not all dealers are comfortable selling these as a spare. However depending on your relationship with a particular dealership/service advisor, they can sell this as a spare and you have to get this installed outside). I would advise that you look for similar headlights outside which would also be cheaper than the ones bought from a dealership.