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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 boots up 2014 IS configurator

Throw away those scraps of paper and pull yourself up to a keyboard, as Lexus has launched the online configurator for its all-new 2014 IS sedan. The base price for the entry-level IS 250 RWD is $36,845 (all listed prices include the $895 delivery fee), delivering a 2.5-liter V6 rated at 204 horsepower that provides enough thrust for a 0-60 sprint in 7.7 seconds. The range-topping IS 350 AWD starts at $42,595, packed with a 3.5-liter V6 rated at 306 horsepower that will deliver 60 mph in just 5.7 seconds.
After choosing an engine and driveline, the configurator will offer eight exterior colors and five interior upholstery shades (some combinations, such as selecting Obsidian over Rioja Red NuLuxe leather, require upgrades such as the F Sport package). Consumers are then offered four different bundled option packages as enhancements. The least expensive is Navigation ($4,670), followed by the aforementioned F Sport ($5,800) and a choice between two luxury packages ($7,195) with light or dark wood trim.
Last to come are the accessories and dealer-installed options such as remote engine start, glass-break sensor, wheel locks and a cargo net. Go crazy with your choices, as we did, and the price will exceed $50,000. Head over to the Lexus IS configurator, and check it out for yourself.

Toyota and Lexus will have standard automatic braking by 2017

Last week, NHTSA and IIHS announced that 20 auto manufacturers and three agencies had agreed to include automatic emergency braking (AEB) as standard equipment by 2022. Toyota was one of those 20 companies, but this week they upped the AEB ante: Nearly every Toyota and Lexus model and trim level will have standard AEB by 2017. That's next year. Many models already offer AEB as part of the Lexus Safety System+ and Toyota Safety Sense packages, but consumers have had to pay extra for these options (unless they leased a Toyota Mirai hydrogen fuel-cell vehicle; it already has AEB as standard equipment.) By the end of next year, all but the Lexus GS, Toyota 4Runner and Toyota 86 — which was developed together with Subaru — will have AEB installed at no extra cost. (Interestingly, the new Prius Prime unveiled at the New York International Auto Show has Safety Sense as an option rather than standard equipment.) The AEB function is part of Toyota's safety suites, which will be included in 25 Lexus and Toyota models. Both makes have a precollision system that detects the possibility of collision with the car ahead and engages the brakes if the driver doesn't react quickly enough, as well as lane departure alerts and automatic high beams. Toyota's move leapfrogs ahead of Honda making its Honda Sensing system, which includes AEB tech, available as a flat $1,000 option on every Civic Sedan. Related Video: This article by Kristen Hall-Geisler originally ran on TechCrunch, a leading technology media property, dedicated to obsessively profiling startups, reviewing new Internet products, and breaking tech news.