I had the software update and one fuel injector replaced at my last visit to the dealer and I am actually happier with the car. Mileage has improved from 21-23 mpg to 23-25 mpg. I drive a lot of highway to work but I do get on it from time to time. Honestly, can't really tell any difference in power. I live in Phoenix, so I feel decreased power and less performance in these super hot summer months when the air is not as dense and boost is less compared to cooler months.
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