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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.

Toyota recalls 1.37 million more vehicles for Takata airbags

Toyota is expanding its passenger-side Takata airbag inflator recall campaign by an additional 1.37 million vehicles in the United States. The models covered under this broadened recall are the 2003-2007 Corolla, Matrix, and Lexus SC430; the 2005-2006 Tundra; and the 2005-2007 Sequoia. In total, Toyota says that this expansion brings the number of its vehicles covered under the Takata inflator recall in the US to 2.915 million. For these latest models, owners will be notified by mail soon. The move is similar to a recent decision by Honda to broaden its recall list. As with millions of other vehicles covered under these recalls, it's possible for exposure to moisture to cause the inflator to ignite too quickly in an airbag deployment. This can cause shrapnel to be sprayed at occupants. At least seven deaths have been potentially linked to these ruptures worldwide. TOYOTA EXPANDS TAKATA AIRBAG SAFETY RECALL TORRANCE, Calif., June 16, 2015 – Toyota Motor Sales, USA, Inc. today announced that it is expanding its recalls involving Takata front passenger airbag inflators. Based on recent information from Takata and the National Highway Traffic Safety Administration (NHTSA), Toyota will recall approximately 1,365,000 additional 2003-2007 Corolla and Corolla Matrix; 2005-2006 Tundra; 2005-2007 Sequoia; 2003-2007 Lexus SC430 vehicles. This brings the total number of Toyota and Lexus vehicles covered by Takata recalls in the U.S. to approximately 2,915,000. In the involved vehicles, the front passenger airbag inflators could potentially be susceptible to rupture when deployed and seriously injure vehicle occupants. "Toyota's focus remains on the safety and security of our customers, and we will continue to respond promptly to new developments so we can resolve issues for them as quickly, conveniently and safely as possible," said Dino Triantafyllos, chief quality officer, Toyota Motor North America. Multiple investigations into the root cause of the potential for inflator rupture are taking place, including by Orbital ATK, an independent engineering firm commissioned by an industry-wide joint testing initiative comprised of the ten automotive manufacturers conducting Takata-related recalls. All known owners of the affected Toyota / Lexus vehicles will be notified by first class mail to return their vehicles to a Toyota / Lexus dealer. The dealer will replace the airbag inflator with a newly manufactured one.

Lexus CT 200h could be replaced by sub-compact hybrid CUV

The Lexus CT 200h is an interesting vehicle that never really caught on. It's a sporty Prius in sleeker hatchback clothing and was aimed at the Audi A3 when it hit the market in 2011. Since then, though, the CT has averaged a meager 16,000 sales per year. For that reason, the hybrid hatch won't be redesigned at the end of its life cycle. And according to Lexus' European brand boss, Alain Uyttenhoven, it could be replaced by a crossover. While you may lament yet another CUV hitting the market, Lexus needs a small car that sells in big numbers. Uyttenhoven told Autocar the brand aims to move 100,000 units per year in Europe to "give us visibility in the market." For 2016, European sales are on pace to hit just 70,000 units, with 10,000 of those coming from the CT 200h. He sees an opportunity for the right little Lexus based on the recent nature of the European luxury market. View 29 Photos According to Uyttenhoven, "a full 50 percent of the European luxury car market exists below the [$44,600] mark," and the only model Lexus has at that point is the CT. Put another way, the company has a remarkably slow seller as its sole representative for half of an entire continent's luxury market. Enter the crossover. Replacing the CT with a crossover makes a great deal of sense. The body style is getting more and more popular by the day, especially in the sub-compact and compact markets. Adding a smaller model – below the current NX crossover but larger than the LF-SA concept shown in Geneva – would allow Lexus to challenge the Mercedes-Benz GLA, the BMW X1, and the Audi Q3. We're betting the small crossover would use the Toyota C-HR as its basis and add a Lexus-correct heavily creased skin. Hybrid power is a given for the European market, where almost all Lexuses sold are gas-electric, but a conventional gas variant could join it in the US. That would give Lexus three hybrid CUVs in three popular sizes, alongside the NX and RX. With a forthcoming RX-based three-row on the horizon, the brand would have a full lineup of crossovers ready to take over the world. We'll miss the quirky CT when it goes, but it's hard to stop volume-driven progress. Related Video: