Lexus is filling a big hole in its SUV line with the all-new TX, a three-row model that shares its dimensions and many mechanical bits with the new Toyota Grand Highlander. Sized a notch up from the RX, the boxy TX has two main powertrains: a 350 with a 275-hp turbo four-cylinder, a 500h with a smooth and powerful 366-hp turbo four-cylinder hybrid. The 500h+, a 404-hp V6 plug-in hybrid with 33 miles of electric-only range, is also available. The TX has a luxurious interior but the gear selector and interior door handles are unintuitive. The cabin has spacious accommodations for all three rows, and tremendous cargo-toting abilities when the third row is folded. The center row can be configured as a bench seat or captain's chairs. The standard Lexus Safety System+ 3.0 bundles a full suite of active safety and driver assistance features, including LCA, ACC, and auto lane change.