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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.

Caddy XT4, Subaru STI Type RA, and blazin' Elon | Autoblog Podcast #553

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor Alex Kierstein and Green Editor John Snyder. We talk about time spent with the Cadillac XT4 and Subaru WRX STI Type RA. Then we get into other topics, including the death of the VW Beetle, our thoughts on the state of the Nissan 370Z, cameras replacing mirrors, the trouble with the Ford Focus Active, and Elon Musk blazing a fat blunt. We indulge in a little conversation about the process of writing about cars. Finally we help a listener choose their next EV in the "Spend My Money" segment.Autoblog Podcast #553 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we've driven: Cadillac XT4 and Subaru WRX STI Type RA RIP, VW Bug What's up with the Nissan 370Z? Lexus to replace side mirrors with cameras RIP, Ford Focus Active You do you, Elon On writing about cars Spend My Money: electric edition Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Green Podcasts Cadillac Ford Lexus Nissan Subaru Tesla Volkswagen Car Buying Technology Coupe Crossover Electric Police/Emergency Sedan cadillac xt4 subaru wrx sti type ra

Japanese earthquakes send ripples through auto industry

The earthquakes since April 14 in Japan's Kumamoto Prefecture on the island of Kyushu are having aftershocks on the US auto industry, particularly for Toyota. The company shut down most of its factories in the country due to parts shortages, and the plants will be closed at least through April 23. "Decisions regarding recommencement of operation at plants in Japan will be made on the basis of availability of parts," the company said in a statement. According to Automotive News, Toyota's closed factories include a vast range of popular models in the US, including the Toyota Prius, Mirai, RAV4, 4Runner, Land Cruiser, Lexus ES, LS, IS, GS, RC, NX, RX, GX, and LX. The company's only sites in Japan that are still open build Hino trucks, Daihatsu models, and the Toyota Century limo. Toyota isn't yet sure whether these shutdowns could lead to vehicle shortages in the US. "As you can imagine, we are still reviewing the situation and working to learn more," company spokesperson Aaron Fowles told Autoblog. "While we know that production will be suspended in stages at most of our vehicle assembly facilities in Japan between April 18th and the 23rd, we do not know if they will continue production suspensions. Also, any effects to our inventory and/or sales have yet to be determined." He expects the automaker to know more in the coming days. Many of the affected Toyota plants aren't even in Kumamoto Prefecture, but major suppliers have factories in the region. For example, Aisin Seiki and Renesas Electronics both had to shutdown operations at plants in the area, according to Automotive News. Toyota isn't the only automaker affected. Nissan experienced a brief slowdown but was back to work on Monday, and Honda has suspended a motorcycle plant in the region until Friday. Mitsubishi had to close a production line due to the parts shortage, according to The Japan Times, but it didn't affect US models. "A supplier to our Mizushima plant has been impacted but they only supply an engine part for our mini car line. That line has been temporarily shut down due to that situation," spokesperson Alex Fedorak told Autoblog. "That same plant builds the Lancer and i-MiEv and there has been no impact to that line and production continues uninterrupted." Two major quakes hit Kumamoto Prefecture around Kumamoto city in the past week. The first on April 14 measured 6.4 magnitude, and a second on April 16 measured 7.3.