"The main complaining about Deere and other brands are the guys that get mad they hacked the code for the ecu and allowed the engine to rev higher and provide more horsepower. Thus lowering the life of the engine and bypassing certain things like DEF. Then something breaks, and the dealer denies the warranty cause it's obvious they messed with the code. So then they go ape shit and say they should be able to customize their vehicle however they want. I know this cause I used to work at a dealer and this happened every season. They read up on some forum how to bypass stuff and boom, I'm replacing their engine."
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