I just bought the 2003 FX35 sport package with 34k miles..

I'm thinking to change the tranny fluid on the car.. so, is it the CVT or a 4 spd ?which type of fluid I should get? please let me know..

Thank you

You have a 5 spd automatic. Regular auto trans fluid should work. You can ask an Infinity srevice dept to make sure even if you do your own work.

Thank you very much

The FX does indeed use a 5 speed automatic common to the FM platform. This is the Jatco RE5R05A and uses Nissan Matic-S transmission fluid and nothing else. Damage can and does occur from using conventional fluid. If you are planning to drain and refill then you should get buy with 4 quarts but most dealers offer a full exchange using a dedicated Nissan Matic-S machine. This prevents possible contamination and is the proper way to perform this maintenance item.

It may cost a little more but the piece of mind and service records (in the unlikely event that something goes wrong) to get action from the dealer.