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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.

Lexus reveals LF-NX crossover concept for Frankfurt

Compact luxury crossovers are becoming big business for upscale automakers. Mercedes is slotting the new GLA beneath the GLK, BMW has the X1 below the X3, Audi has downsized from the Q5 to the Q3, and Lexus is keen to get in on the game. And to that end, Toyota's luxury division is coming to the Frankfurt Motor Show this year with the concept crossover you see here.
Previewed a couple of weeks ago with an enigmatic teaser, the LF-NX concept, in the company's own words, "explores the potential for a compact crossover within the Lexus model range." The latest adaptation of the "L-finesse" design language could be the sharpest and most stylistically Japanese we've seen yet, with the sharp creases of the signature spindle grille repeated all around for a razor-sharp look. Lexus only released one shot of the cabin, but it looks as sharp as the exterior and, while clearly stylized, looks essentially more production-ready than most show cars.
Lexus hasn't revealed much about the powertrain, saying only that it incorporates "a new variant of the Lexus Hybrid Drive system tuned for SUV performance." Whether it actually has an engine that Lexus will detail at the show remains to be seen, but you can delve into the press release below for more and scope out the five images released thus far in the gallery above for a closer look.

2019 Lexus ES 350 F Sport Quick Spin Review | Yet another Lexus surprise

The 2019 Lexus ES 350 F Sport truly cements that "driving like a Lexus" now means something far different than it ever did before. It's not dull, it's not anonymous and old ladies probably won't like it. It should not be painted pearlescent white. Instead, the new ES is genuinely engaging to drive, feeling every bit like it was spawned from the same gene pool as the lustworthy LC coupe and surprisingly sharp LS flagship sedan. I actually enjoyed driving it more than the BMW M550i, and I liked driving that car quite a bit. Seriously. No one is as surprised by that statement as the guy who typed it. It really comes down to what you feel through that F Sport steering wheel, through your heels planted in the floor below, and the seat of your pants that's now placed lower in a sportier driving position. The 2019 ES 350 is one of those cars that manages to shrink around you as you hustle it along, feeling much smaller than its full-size sedan dimensions would indicate. It may be based on the Avalon, but that car never felt as lithe and responsive as its Lexus cousin. The extra structural rigidity of the ES is part of the equation. Now, to be fair, the ES in question is the F Sport model fitted with the optional Adaptive Variable Suspension derived from the divine LC, which no doubt helps the dynamics compared to lesser ES trims. But judging by the impressions of others, plus the rest of Lexus' redone lineup, lower-trim ESs seem to drive well. Even the base cars come with novel swing-valve shock absorbers designed to ably soak up bumps while keeping things level around corners. The electric power steering motor has also migrated from the column to the rack – a sure fire way to improve steering feel. And that it does, plus Lexus has a knack of tuning the various steering settings (Normal, Sport and Sport+) to be subtle in their increase of effort. There's no overly stiff weighting to satisfy the notion that "sporty" steering equals "stiff" steering, as is often the case in cars with variable drive settings. Appropriately, I drove in Normal around town and in Sport+ on my mountain road evaluation route. The differences aren't night and day -- it still feels like you're driving the same car -- it's just been tweaked slightly for ideal performance. These drive settings also adjust the adaptive suspension, if so equipped.