What did you replaceJust to let you know, we had 3 muranos all with that same, off the line hesitation problem. Took one if them to nissan who said it was the transmission. I paid 1200 for a rebuilt and supposedly they extended warranty. But when I drove it home, same problem so I traded it in for a new car. That was a year ago. Then I decided to go to auto mechanic school, I was tired if getting ripped off.
Turns out the trans wasn't bad. After being in school now, I checked one of our other Muranos. Problem is a simple 80 dollar air inlet flex piece that connects air filter to throttle inlet. The mass airflow sensor is by the filter. All of these tubing go bad in the ribbed section, it cracks, leaks in air after maf sensor and you get hesitation and more gas usage. Checked 3rd murano, same piece had a crack. Both are running fine. I wish I had known before I got a new trans and traded one in.
That's why I wanted to be a mechanic. Tired of getting ripped off. Be careful, believe me, every place out there is going to drastically over sell on parts needed to fix the car