I came across this topic about RockAuto and I thought I would put my comment in also. I have a 1995 Pathfinder SE 3.0L auto trans. I love this vehicle and as a result I like to keep it in great running order. I found a re manufactured long block listed on RockAuto so I ordered it. About a week or so later the engine arrives. I open the engine pod to inspect the engine only to find that the pod contained a Ford V-6 long block. I contacted RockAuto and told them of my findings. I was given instructions on how to return the engine and get credited for it. The engine was returned and that's the last I heard from them. They never attempted to send out another engine.
I finally had to go back to their web site and place another order for the long block. The ad for the engine states that all finishing gaskets necessary to complete the engine change would be included..less the gaskets used to assemble the long block. Ok that makes sense. I get the engine and it appears correct. The gaskets for the oil pan consists of a form fitted single neoprene gasket. I go ahead and use the provided gasket as instructed . Once I have the engine back in the vehicle I notice a oil leak at the rear of the engine. Thinking it was a rear main seal leak I pulled the engine again. The seal was not leaking but the oil pan gasket I had been provided to use was now leaking at the rear lip area. I went on line and discovered that the gasket I had been provided by the engine builder was not the correct pan gasket. I contacted RockAuto and was told that they would not cover the gasket because it had been improperly installed. I explained that the proper gasket for this engine was a two piece gasket with silicone gasket material for the side sections. They still refused to reimburse me for the correct gasket. I realized that trying to conduct business with customer relations rep was useless so I fired off a letter to corporation. This issue is still pending.
I also ordered a speed sensor for the transmission which arrived quickly. This sensor does not fit. How hard can it be to send out the right part? I contacted RockAuto and was told that it was my resposibility to pay return postage on the wrong part. REALLY!!
My contact with RockAuto has not been stellar by no means. I do like the prices on some parts but I also just use their site to get part numbers and shop elsewhere.
Happy trails..Croz