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Nissan Leaf and the future of auto shows | Autoblog Podcast #525

Related: We obsessively covered the Frankfurt Motor Show — here's our complete coverage On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Joel Stocksdale. The pair discuss the long-awaited reveal of the second-generation Nissan Leaf as well as the Alfa Romeo Giulia and BMW M550i that recently passed through the office. They also preview the 2017 Frankfurt Motor Show and discuss the future and relevance of auto shows. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want buying advice of your very own, send a message or a voice memo to podcast@autoblog.com. (If you record audio of a question with your phone and get it to us, you could hear your very own voice on the podcast. Neat, right?) And if you have other questions or comments, please send those too. Autoblog Podcast #525The video meant to be presented here is no longer available. Sorry for the inconvenience.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 Topics and stories we mention Rundown Nissan Leaf reveal Frankfurt Motor Show preview What we're driving: Alfa Romeo Giulia and BMW M550i Unpopular opinion: the relevance of auto shows Spend my money Feedback Email – Podcast at Autoblog dot com Review the show on iTunes Image Credit: BMW, Nissan Green Podcasts Frankfurt Motor Show Alfa Romeo BMW Nissan Hatchback Electric Luxury Sedan alfa romeo giulia

BMW reveals M4 safety car with innovating water injection system [w/video]

Racing series don't just pick their safety cars at random, or use just whatever car is lying around. These days the car that sets the pace at the front of the pack is typically provided through consideration by a sponsor. In the MotoGP series, that's BMW and its M division, which have served up the Official Car of MotoGP since 1999. What you're looking at is the latest, and it packs some innovative technology on board. Aside from the matte black wrap with BMW's iconic striped livery, upgraded aero kit, retrofitted interior and emergency equipment, this BMW M4 coupe packs a new injection system under the hood. Only instead of injecting fuel, it injects water into the combustion chamber – something that wouldn't usually be recommended, but BMW insists actually aids in the combustion process. The idea is that the temperature of the air being mixed with the fuel inside the engine is usually hotter than ideal, so the system injects a fine mist of water into the collector in order to reduce the air's temperature... sort of like one of those hydrating misters at an amusement park or outdoor mall, but in an even hotter environment. The system brings the temperature of the air down to a more optimal temperature, helping it combust better. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. Whether that eight percent is worth the added weight of the system – particularly with water pump and a 1.3-gallon tank in the trunk – is up for debate. But we'd imagine that the Bavarian engineers have weighed very carefully. Of course there's also the matter of refilling the water tank, which BMW says would be carried out whenever the safety car is refueled, but in real-world conditions would only necessitate attention once every five top-ups at the gas station. By now you might have guessed that BMW probably didn't develop this system just for the MotoGP safety car, and isn't planning on keeping it confined to the racetrack. Instead it's being tested and demonstrated on the safety car before being rolled out on production models in the future.

BMW calling in 76k vehicles over airbag issues

Vehicles these days are typically fitted with a mat in the front passenger seat that determines whether that airbag needs to be activated in the event of a collision and how it should deploy. But that system doesn't always work, as Mercedes recently found in its SL-Class roadster and as Suzuki did before it with the Grand Vitara and SX4 crossovers. Now a crop of BMW vehicles have befallen the same issue, prompting the Bavarian automaker to cooperate with the National Highway Traffic Safety Administration to issue a recall for the vehicles in question.
The problem affects precisely 76,565 vehicles, including certain the 3 Series (sedan and wagon), 5 Series, 7 Series and X5 crossover families spanning the 2006 and 2007 model years and fitted with a certain type of seat. However, since the parts to repair the problematic components are not currently available, as you can see from the recall notice below, it won't be until March 2014 when local dealers will be able to resolve the issue.