There are set times. Warranty times and standard times. Each job has a specific time that it should be completed in. That is where they get the estimate from. The dealership can not charge you more than the written estimate that they give you origonally unless if parts break(nuts/bolts) while they are working on the vehicle. Every Nissan dealership has the same hour per job times. The only place to look it up would be programs like AllData and Shop Key. I have access to both of these programs and if needed I can give you the time it takes to complete whatever job on Monday.
