I get shipped wrong parts about 10-15% of the time regardless of where I buy them. One time I went to a store to buy an alternator and they handed it to me and I opened it and a dirty old core was inside. Then I went to the next store, they hand it to me, I open it, and the pulley is cracked... And those were the only 2 stores in town that had one! Always check your parts as much as possible before you start and during replacement. These things happen but the good suppliers will make it right.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra