The theory that Toyota’s car sales are an unbreakable force doesn’t jibe with October 2010’s Sales Stats. Car sales at Toyota USA were down 19.6% compared with October 2009. Scion, which sells cars and nothing but, are included in that Toyota percentage decline. Thing is, if you separate Scion from the Toyota pack, Toyota’s numbers get worse. See, Scion sales were up 25.7% in October, thanks in no small part to the 2011 Scion tC. Include Lexus in the mix and total Toyota Motor Corporation car sales in the USA are seen in the light of a 17% decline in October.

There are bright lights in the Toyota division. Most notable among them is the rebirthed 2010 Toyota 4Runner seen in The Good 12 Supersize v2.0. 4Runner sales jumped ridiculously compared with October 2009’s abysmal totals, but grew compared with September 2010, too. Check out the Scion and Lexus model-by-model breakdowns after the jump.

Toyota Camry: 25,014
Year-over-year volume change: -17%
Last month: 30,769
Year-to-date: 275,844

Toyota Corolla/Matrix: 18,636
Year-over-year volume change: -27.5%
Last month: 21,060
Year-to-date: 227,822

Toyota RAV4: 14,694
Year-over-year volume change: +5.2%
Last month: 14,685
Year-to-date: 141,085

Toyota Prius: 11,731
Year-over-year volume change: -13.1%
Last month: 11,394
Year-to-date: 115,065

Toyota Sienna: 9253
Year-over-year volume change: +12.2%
Last month: 9920
Year-to-date: 81,384

Toyota Tacoma: 9028
Year-over-year volume change: +1.2%
Last month: 8874
Year-to-date: 86,612

Toyota Highlander: 8664
Year-over-year volume change: +44.9%
Last month: 7824
Year-to-date: 71,694

Toyota Tundra: 7187
Year-over-year volume change: -4.6%
Last month: 6923
Year-to-date: 75,832

Toyota 4Runner: 4197
Year-over-year volume change: +1116.5%
Last month: 3577
Year-to-date: 37,374

Toyota Venza: 3551
Year-over-year volume change: -29.5%
Last month: 3546
Year-to-date: 39,961

Toyota Yaris: 2707
Year-over-year volume change: -38.3%
Last month: 2835
Year-to-date: 34,500

Toyota Avalon: 2208
Year-over-year volume change: -13%
Last month: 2504
Year-to-date: 23,513

Toyota Sequoia: 1447
Year-over-year volume change: -2.1%
Last month: 1208
Year-to-date: 10,647

Toyota FJ Cruiser: 1240
Year-over-year volume change: +46.1%
Last month: 1424
Year-to-date: 12,590

Toyota Land Cruiser: 172
Year-over-year volume change: +4.2%
Last month: 109
Year-to-date: 1450

It still looks the same, but the 2011 Scion tC has undergone some changes from the model that’s been around since, well, has it always been around? Sales jumped dramatically from the same period of last year and even put in a 120% boost over the month prior. As for the xB and xD, not so much.

Scion tC: 2162
Year-over-year volume change: +104.5%
Last month: 981
Year-to-date: 11,991

Scion xB: 1618
Year-over-year volume change: -9.2%
Last month: 1687
Year-to-date: 17,421

Scion xD: 874
Year-over-year volume change: -14.6%
Last month: 894
Year-to-date: 8476

The more things change, the more things stay the same. Toyota USA sales tumbled in October 2010, a period in which the vast majority of automakers increased sales in double-digit fashion. Meanwhile Lexus posted gains and was the best-selling luxury brand in America. How so? Look at its two best-sellers: as always, the RX and ES pull other Lexus models along by their bootstraps.

Lexus RX: 8569
Year-over-year volume change: +3%
Last month: 7420
Year-to-date: 76,465

Lexus ES: 5153
Year-over-year volume change: +16.8%
Last month: 3697
Year-to-date: 39,113

Lexus IS: 3096
Year-over-year volume change: -2.1%
Last month: 2447
Year-to-date: 27,790

Lexus GX: 1306
Year-over-year volume change: +283%
Last month: 1054
Year-to-date: 12,828

Lexus LS: 1202
Year-over-year volume change: +49.5%
Last month: 712
Year-to-date: 9489

Lexus HS: 792
Year-over-year volume change: -48.1%
Last month: 711
Year-to-date: 8754

Lexus GS: 557
Year-over-year volume change: +12.8%
Last month: 542
Year-to-date: 5796

Lexus LX: 401
Year-over-year volume change: -0.7%
Last month: 339
Year-to-date: 2996

Lexus SC: 15
Year-over-year volume change: -63.4%
Last month: 26
Year-to-date: 298

Related From GoodCarBadCar.net
U.S. Auto Sales By Brand – October 2010
American Honda Sales – October 2010
General Motors USA Sales – October 2010
Volkswagen Group USA Sales – October 2010
Hyundai & Kia USA Sales – October 2010
Ford Motor Company Sales – October 2010
Nissan & Infiniti USA Sales – October 2010
Mazda USA Sales – October 2010