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What a 181-horsepower 2019 Mazda MX-5 Miata means for us, and you

Last month, we reported on a VIN filing dug up by Road & Track that showed that the 2019 Mazda MX-5 Miata's 2.0-liter Skyactiv-G engine would get a power bump, from 155 to 181 net horsepower. As for how the 2019 Miata would make that extra power, we heard rumors it'd utilize a new cylinder head allowing higher revs, accounting for that extra power. Now we have what appears to be a leaked document from Mazda Canada showing exactly where that extra power comes from. According to the document posted at Miata.net (registration required to see the image), Mazda will alter camshaft lift and valve size on both the intake and exhaust side, fit freer-flowing exhaust, and smooth and enlarge the piping on the air intake side. There are also internal engine modifications: lighter pistons with lower crowns for better swirl in the combustion chamber, lighter connecting rods, and a crankshaft balanced for higher-RPM operation. All those extra revs mean extra vibration and noise, so Mazda will ditch the single-mass flywheel for a "low-inertia" dual-mass flywheel – which will attempt to find a nice balance between DMF damping action and SMF directness. Overall, it's a pretty serious engine revision with some driveline changes that will heavily affect the driving characteristics of a fantastic driver's car. Contributing Editor James Riswick and Senior Editor Alex Kierstein, both well versed in Miatas past and present, are here to analyze what this could mean for the little roadster. James Riswick: I don't know much about them lighter crank combustion rods, but I for one welcome the news of more power to the Miata. The jump from 155 to 181 seems like a very prudent Mazda-like thing to do, accomplishing that task through various aforementioned technical wizardry as opposed to slapping on a turbocharger, exclaiming "yee-hah" and calling it a day. Alex Kierstein: That's true. I'm wary of additional power, but you do make a good point that at least this is the right way to do it. Going all-motor will keep the bright responsiveness of the engine intact. But higher revs might make power delivery peakier. Frankly, I'd be ok with moving the torque and horsepower peaks up a bit in the rev range, making it a bit more work to access the engine's sweet spot. The dual-mass flywheel should also help if low-end torque suffers, so less stalling in traffic. JR: Did wonders in the 911 and 718s.

Refreshed 2017 Mazda 3 and 6 get G-Vectoring Control

Back in June, we told you about Mazda's G-Vectoring Control system, which is an additional layer of unobtrusive cornering assistance to help maintain traction at the limits of adhesion. It's subtle to the point of being hard for a human being to detect, even a Mazda engineer, as we found out driving a G-VC equipped Mazda 6 around Mazda Raceway Laguna Seca. We knew then that the G-VC system would make it to the 2017 Mazda 3 and 6, but now all the details of both mildly refreshed cars are available. Let's start with the Mazda 3, which has a few more changes than its larger stablemate. As is standard industry practice, a mild facelift includes available LED headlights and taillights, a new grille, and a monochrome rear bumper. Inside, the slightly recontoured steering wheel now has available heating and the manual handbrake has been replaced by an electronic one. Fans of handbrake turns will frown, but those handles take up an immense amount of room (relatively speaking) inside the center console. The redesigned center storage bin takes better advantage of that newly freed-up space. Lastly, Mazda claims the 3 is quieter thanks to improved insulation and weatherstripping. The Mazda 6 was just refreshed last year, so the list of changes is even shorter. The larger sedan benefits from similar sound-reducing tweaks as the 3, and the entry-level 6 with a manual transmission now comes with the Mazda Connect infotainment system, a real upgrade from the older non-touchscreen system. One thing that both share is an available full color head-up display, which replaces a functional but ancient-looking monochrome unit. If you've been in a Mazda currently on sale with this old-looking system, you'll really appreciate the way this new one looks. We can't wait to try it out. Both new Mazdas go on sale in September. Pricing isn't available at this time. Related Video: Featured Gallery 2017 Mazda3 Unveiling View 15 Photos Related Gallery 2017 Mazda6 Unveiling View 14 Photos Related Gallery 2017 Mazda3 View 36 Photos Related Gallery 2017 Mazda 6 View 33 Photos Image Credit: Live photos copyright 2016 Drew Phillips / Autoblog.com Mazda Hatchback Sedan mazda 3

Five automakers now being investigated by NHTSA for airbag woes

It appears that Toyota's renotification to owners of recalled vehicles from last year is just the tip of the iceberg for what could potentially be a much larger industry-wide recall. The National Highway Traffic Safety Administration is opening a preliminary evaluation investigation into roughly 1.1 million vehicles from Chrysler, Honda, Mazda, Nissan, Toyota and parts supplier Takata regarding faulty airbag inflators in several models.
NHTSA has received six reports - three directly, two from Takata and one from Toyota - of vehicles with ruptured airbag inflators from 2002-2006, which resulted in three injuries. So far, all six incidents have occurred in high humidity areas like Florida and Puerto Rico. According to Toyota's latest recall announcement, the inflators may have an improper propellant that could cause it to rupture in a crash and the bag to deploy abnormally.
This new investigation follows a previous recall from April 2013 of about 3.4 million vehicles worldwide for the airbag inflators from Takata. As Autoblog reported, Toyota jumpstarted the new situation when it found that the original list of serial numbers for the faulty part was incomplete and discovered more cars in need of replacement. Honda and Nissan told us that they were investigating whether further models would need called in again as well. Mazda told Autoblog: "Regarding the current Takata situation, we're working closely with NHTSA and investigating the situation, but nothing else to report at this time." Chrysler Group responded to us with the statement: "Chrysler Group engineers are conducting the appropriate analysis. The Company will cooperate fully with the National Highway Traffic Administration."