Knock sensor code, dealership claims is because a rat chewed on wiring, wants to charge me over $3K!

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Shark

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Frisco, TX
To summarize, 2022 with 20K miles started throwing P0325 Knock Sensor Bank 1. Dealer is looking at it and claims a rodent made a nest in there. In addition to the initial teardown for diagnostics which was about $600, now they want me to authorize another $2750 to complete the repair. Of course not under warranty due to the claim of rodent damage. Does nearly $3400 to complete this repair sound reasonable or what? I know they need to remove the intake, fuel rails, and some parts are single use (I read injector seals and maybe a fuel line), but $3400!?
 
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