The original radiator overflow/expansion bottle on my 2004 Ram truck was in sorry state so I thought I'd buy a new one. Turns out you can't buy a replacement tank but you can buy the new style which has both the washer reservoir and the radiator overflow molded together in one unit. I swapped the new style into my truck over the weekend. The new style looks a lot better and it is a cleaner design. Only issue I had is that the connector for the low level plug didn't fit. I think I need to pull the sensor from my old tank out and put it in the new tank. Hopefully the hole is the same size so the grommet will fit properly.