I present you, the Audi B5 S4.
I picked up prob the cleanest mid mileage S4 in the trI state area. 40k, complete service records from delivery. Silver w. white interior. 6 speed. Car was a dream.
The second i through mods, and started really pushing it, it started to fail. Miserably. And not even like real mods. Intake, exhaust, downpipes, tune. No motor work or anything. Every week there was a new leak, or new noise, or new sensor gone bad.
The cars killshot was the 1-2 shift collars being reduced to atoms on a nice spirit run through 7 lakes drive in NY(IYKYK) leaving me to get home, about 40 minutes, with no 1st or 2nd gear. The collar failure blows the syncros to pieces, so it ends up being a full trans overhaul. less than a week after completing that, i was greeting to nice plumes of smoke from the exhaust. Smoked the turbos.
Car was sold shortly after.