I took in my 2017 Model S 75 RWD (19k miles) into the SC this week as I had been noticing a weird humming noise. After two test drives the SC said they'd need to replace the drive unit. On the invoice the replacement part that was used is ASY,P-TRAIN,RMN,MDLS,SPORT,CMC,HS 1025598-00-T. I'm a bit confused that the DU that was installed is of type SPORT since I do not have a performance model. Anyone else had a similar situation? Wondering if they maybe just install the SPORT for simplicity and there is a software limit in place that makes it a non-sport.