ToyotaPartsDeal.com offers the wholesale prices for genuine 2012 Toyota Sienna parts. Parts like Heating & Air Conditioning - Cooler Unit are shipped directly from authorized Toyota dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.7L, 6 Cyl 3.5L. Trim: LE, SE, STD, XLE.