「升值資產」承諾未兌現
Some Tesla owners have been finding out the hard way that their car’s Full Self-Driving software does not add long-term value to their vehicle.
據幾位特斯拉車主的現身說法，特斯拉車輛的全自動駕駛（Full Self-Driving, FSD）軟體並未為他們的愛車帶來長期價值。
the hard way經過慘痛教訓long-term(adj.)長期的short-term(adj.)短期的
This news follows reports of Teslas with FSD not keeping the cost of this added feature when being traded in.
此前有報導指出，搭載FSD功能的特斯拉在換購時，此附加功能的價值並未反映在價格上。
keep the cost保值trade in換購
One owner named Alex tried to trade in his 2020 Tesla Model Y Performance with FSD software and was offered only $37,700 for his car.
一位名為艾力克斯的車主試圖將他一台附FSD軟體的特斯拉Model Y Performance 2020年型號的愛車進行換購，換購價報價僅達37,700元美金。
offer (sb.) sth. (for sth. else)(向誰)提供～(換取～)pay (sb.) sth. (for sth. else)(向誰)付～(購買～)
He was told that without FSD, he would have been offered $33,800.
廠商向他解釋，如沒有FSD，他將只會拿到33,800元美金。
At the time Alex bought his Tesla, he paid $7,000 for FSD.
當艾力克斯買下他的特斯拉時，他可是以7,000元美金購得FSD功能。
So when attempting to trade in the car, this feature lost $3,100 in value.
所以當他一試圖換購，這項功能便損失了3,100元美金的價值。
attempt(v.)嘗試，可以當作(=高級的 try)
There have been other instances of people working for Tesla saying that “FSD does not change the value” of a car when it is traded in.
有其他特斯拉的員工也表示，換購時，車子「有FSD，價值仍保持不變」。
instance(n.)事例there are instances of(+N or VN)有～的事例發生
This information seems to go against Tesla CEO Elon Musk’s promise that FSD would be an “appreciating asset” for the value of the company’s cars.
這項資訊似乎與特斯拉執行長馬斯克的承諾相悖，他曾說FSD將為「升值資產」，提升自家車輛整體價值。
go against與～相左、違背
In fact, the FSD feature is constantly increasing in price and now costs around $15,000.
事實上，FSD功能的價格一直在上漲，如今約是15,000元美金。
constantly(adv.)不斷地
Therefore, these cases of FSD software losing value may have buyers deciding not to pay for the feature on their new Teslas in the future.
因此，這些FSD軟體價值減損的案例可能會讓未來的買家決定不為他們自己的新特斯拉愛車添購這項功能。
have sb. VR／adj.使～做什麼／呈什麼狀態