Hi Aaron, I'm glad to assist you. No, it does not come with all the needed gasket and seals. It is just the a/c compressor itself. The matching a/c O-ring kit for this a/c compressor is part number GPD1321347. If your truck appears in the vehicle fitment information (after selecting the year, make, model, submodel, and engine size), it is guaranteed to fit. Grab our price-cut promo and click the two links below to buy them today. Happy shopping! https://www.carparts.com/a-c-compressor/denso/np4711017?cpcid=Q1BKRTEwNDN8V3JpdHRlbiBJbnRlcmFjdGlvbiBUZWFtIC0gQ1NRQXwvYS1jLWNvbXByZXNzb3IvZGVuc28vbnA0NzExMDE3fDIwMjUwNTA5 (a/c compressor) https://www.carparts.com/details/Toyota/Highlander/GPD/A-fs-C_O-Ring_and_Gasket_Seal_Kit/2012/Base/6_Cyl_3-dot-5L/GPD1321347.html?cpcid=Q1BKRTEwNDN8V3JpdHRlbiBJbnRlcmFjdGlvbiBUZWFtIC0gQ1NRQXwvZGV0YWlscy9Ub3lvdGEvSGlnaGxhbmRlci9HUEQvQS1mcy1DX08tUmluZ19hbmRfR2Fza2V0X1NlYWxfS2l0LzIwMTIvQmFzZS82X0N5bF8zLWRvdC01TC9HUEQxMzIxMzQ3Lmh0bWx8MjAyNTA1MDk= (a/c O-ring kit)

Hi Mark, thank you for reaching out. This part comes pre-filled with oil. If your vehicle information matches this part, you can use this link to continue ordering this part at a discounted price today: https://www.carparts.com/a-c-compressor/denso/np4711017?can=CPAP3648_CSQA_20240619 I hope this helps. Happy shopping.