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Why is there a huge bulge in 2021 Lexus IS 300 AWD's driver footwell? We explain

After an initial turn a few weeks ago for the 2021 Lexus IS first drive review, the revised luxury sedan has returned to the Autoblog garage for a second look. This middle-of-the-road IS 300 AWD pairs a 260-horsepower V6 with a six-speed automatic transmission and four driven wheels, and frankly it's the least interesting way to spec out the redesigned sedan. While there are cars in this segment designed to get a performance boost from their all-wheel-drive systems even in dry conditions, the IS isn't one of them. Adding insult to injury, you get stuck with a cramped driver-side footwell care of the engineering shenanigans that went into making this system possible.  While we've mentioned this particular compromise before, we rarely touch on the reasons why it exists in the first place. The fundamentals are fairly obvious; the standard IS utilizes a longitudinal, rear-wheel-drive powertrain. As is typical with this configuration, the transmission sits in a tunnel beneath the center console. This arrangement works just fine, provided you don't need to power the front wheels.  To do so in a traditional car like the IS requires a literal end-around maneuver involving the engine and transmission, which we've diagrammed for you below care of MSPaint. This is a bit simplified for the sake of this write-up, and it should be noted that this is not the only way to implement AWD in an inherently RWD platform, but it illustrates how the power for the front axle (red) and rear axle (blue) flows from the transmission to the drive wheels. To get juice flowing to the front axle, Lexus had to add a parallel output shaft, exiting the transmission from the front with enough clearance for the bell housing and engine, which sits between the transmission and the front differential. This requires quite a bit of lateral reach, meaning the housing has to extend much farther out than usual to accommodate it (yellow arrow). As a result, the all-wheel-drive transmission looks a lot like a sci-fi gun with a chunky drum magazine hanging off the side of it. The hump (above right) in the footwell is there to clear this protrusion. This basic configuration isn't unique to Lexus. In fact, if you look at a BMW xDrive cutaway, it's similar. So, why no "hump" in other cars? There are multiple factors, but to boil it down to what is most relevant, it's a combination of the resulting shape of the Lexus transmission housing and the size of the IS chassis.

2020 Lexus RX350 and RX450h debut with refreshed styling and updated tech

The 2020 Lexus RX350 and 450h made their debuts late last night, refreshing the fourth-gen model that made its debut back in 2015. The luxury crossover gets a number of updates, with the changes mostly focused on styling, tech and safety. The new three-row model carries over, too, with the second row sporting a set of captain's chairs rather than a full bench. The 2020 RX is set to go on sale in the U.S. in late August 2019. The updated model doesn't look all that different than the 2019 model, especially from the profile. That said, the front and rear fascias have both been smoothed out, taking cues from the handsome LC coupe and LS sedan. All the lines look a bit more sleek, with thinner headlights and L-shaped blades in the taillights, again similar to the LC and LS. There's a sharp crease toward the bottom of the RX that carries across the grille, rocker panel and rear bumper. The grille itself gets a new mesh pattern. The interior is mostly unchanged, with changes mostly focused on comfort rather than design. Three-row models now have more adjustment in the back row, and the second row gets the aforementioned captain's chairs. The infotainment system gets a much-needed update. While the frustrating-at-best touchpad interface is still present, the RX now gets a touchscreen, hopefully improving one of our major complaints with the system. The RX also gets Apple CarPlay and Android Auto, something long missing from Toyota and Lexus vehicles. Voice control can be used through Lexus' own system or using Apple Siri or Google Assistant. There's also a new USB port and a phone holder to keep things in place. Underneath the skin, the 2020 RX gets a revised suspension setup and extra chassis stiffness, the latter thanks in part to new welds, high-strength adhesives and stiffer stabilizer bars. The RX has what Lexus calls Active Cornering Assist and a re-tuned stability control system to mitigate understeer mid-corner. The shocks, too, are revised to improve ride comfort and handling. Lexus says the suspension updates should improve steering feel, too. Finally, there's a few updates to the RX's safety systems. The crossover comes with the latest version Lexus Safety System +, a safety suite that includes features like pre-collision warning, adaptive cruise control, lane-keeping assist and traffic-sign recognition. The new headlights have Lexus' BladeScan Type Adaptive Headlight System, or AHS.

Lexus LS 500 Inspiration Series is a limited extra-luxe edition of the flagship sedan

Lexus is continuing its trend of making its “Inspiration Series” of cars, and the latest model to get the treatment is the LS 500. Just like all the others before it, this one is mainly an appearance package meant to set it apart from other LS 500s on the road.  The first unique touch is its Deep Garnet paint that isnÂ’t available on the normal LS 500. Then you get 20-inch black chrome wheels that go quite nicely with the paint color. Lexus didnÂ’t forget the Inspiration Series interior, either. Standard is the ultra-luxe Kiriko glass trim you can get as an option on the regular LS 500. It looked stunning on that car, and itÂ’s going to look great combined with the white leather seats on this one, too. Lexus is also giving the Inspiration Series blue LED dash lighting and “Lexus” puddle lamps below the doors. There are only going to be 300 LS 500 Inspiration Series cars sold in America, and theyÂ’re going to be available to buy this fall. Mechanically, itÂ’s exactly the same as a regular LS 500 with the 3.5-liter twin-turbo V6 making 416 horsepower and 442 pound-feet of torque. As for pricing on this limited-edition model, Lexus isnÂ’t saying quite yet. A regular LS 500 similarly equipped is around the $100,000 mark, so look out for something in that range when we do get a price. Related Video: