How much does a new transmission cost in a 2005 Mazda 3?

The cost of a new transmission for a 2005 Mazda 3 typically ranges from $1,500 to $3,500, depending on whether it's a manual or automatic transmission and the source of the transmission (new, rebuilt, or used). Labor costs for installation can add another $500 to $1,000. It's advisable to get quotes from multiple repair shops for a more accurate estimate.