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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 Bladescan is another new headlight safety breakthrough U.S. won't get

Lexus is back at it with innovative lighting technology. The BladeScan headlights available in Europe on the 2020 RX utilize a new mechanism for throwing light further down the road, aiming that light more precisely, and doing so without blinding other road users. Lights from other OEMs with the same capabilities have increased the number of LEDs inside the housing for finer control. The BladeScan module inside the Lexus lights holds the number of LEDs down to 10 on each side of the RX, which Lexus says is a more cost-effective solution. In fact, BladeScan uses fewer LEDs than Lexus' most recent adaptive high-beam system, which has 24 LEDs on each side. The LEDs in the new module are arranged in two rows, eight on top, two on bottom. The diodes are fed information about objects ahead, and adjust their intensity to dim light aimed at an oncoming car, or illuminate a pedestrian by the roadside. However, the LEDs don't shine their light down the road, they shine their strobing light onto two blade-shaped mirrors — hence the name BladeScan — that rotate at high speed. The light reflects off the mirrored blades and into a lens, which orients the beam down the road. Not only is the reflected light easier to handle for oncoming drivers, the system has aim accurate to 0.7 degrees. Lexus' current adaptives are accurate to 1.7 degrees, making BladeScan a 143-percent improvement. That means the new feature can throw even more light into areas that are hard to reach with current lights — Lexus says pedestrian recognition at night has increased from 105 feet to 184 feet. Buyers of the 2020 RX will be able to take advantage when the new crossover goes on sale in Europe later this year. Naturally, U.S. Federal Motor Vehicle Safety Standard No. 108 means we won't get BladeScan — that goes for you, too, Canada. The now-52-year-old U.S. law mandates a single low beam and a single high beam setting, with no intermediate settings and no activation of high and low beams simultaneously. Toyota, Audi and BMW have been trying for six years to get FMVSS 108 changed to permit new and potentially lifesaving headlight technologies. The automaker wrote in a statement to Carscoops, "Last December, Lexus submitted a petition to NHTSA to allow ADB in the United States. Currently, we await the Agency's decision and hope to see an amendment in FMVSS 108."

2015 Lexus GS 450h also getting F Sport treatment

Lexus is making the 2015 model year version of the GS 450h a bit more appealing with the addition of 18-inch, split five-spoke wheels as standard equipment, and the optional F Sport package to really turn things up. The infotainment system is also getting a few, minor tweaks. Lexus has not officially released photos of the GS 450h F Sport, or a car with the updated wheels.
Previously exclusive to the GS 350, the F Sport package sharpens up the GS 450h behind the wheel to make it a bit more engaging. Ticking that box sharpens the adaptive suspension, especially in Sport S+ mode, and it adds 19-inch wheels with larger front brakes and high-friction pads, as well. If buyers want to go even further, the Lexus Dynamic Handling system is also available to add active rear steering, Lexus spokesperson Bill Kwong told Autoblog. The powertrain is left alone, though, and its hybrid-assisted 3.5-liter V6 producing 338 total system horsepower still returns 29 miles per gallon city, 34 mpg highway and 31 mpg combined.
The F Sport package also adds a mesh grille and new front bumper and, at the back end, buyers get a rear lip spoiler and revised lower valence panel. Inside, there's a sport driver's seat with 16-way power adjustability, a black headliner and added aluminum trim.