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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.

Mazda recalling 18k Mazda6 and RX-8 models over airbag inflators

Faulty Takata airbag inflators keep taking their toll on automakers. Mazda is the latest to be affected in the US by announcing a recall covering 18,050 Mazda6 and RX-8 models to replace the front, passenger-side airbags. Specifically, the campaign covers 18,000 Mazda6 units from the 2003 and 2004 model years built between May 29, 2002, and March 4, 2004, and 50 RX-8 vehicles from the 2004 model year made between June 25, 2003, and June 30, 2003.
As with the rest of the vehicles with these faulty inflators, it's possible for the part to rupture when deploying the airbag and potentially spray shrapnel at the occupant. Mazda's defect notice goes into a bit more detail than most about the problem saying: "some propellant wafers have been produced with an inadequate compaction force, or may have been exposed to uncontrolled moisture conditions (those wafers could have absorbed moisture beyond the allowable limits)."
This isn't Mazda's first difficulty with Takata-supplied airbags this year. The company was among the seven automakers that recalled vehicles in hot-weather states over the inflators. It also had to recently fix 42,000 Mazda6 vehicles in China over the issue.

Mazda previews new CX-9 ahead of LA debut

Mazda will unveil its new CX-9 crossover at the upcoming Los Angeles Auto Show. The teaser rendering above gives us an idea of what to expect. The CX-9 was launched nine years ago. And though it's undergone a series of updates along the way, it's due for replacement. Fortunately that's just what Mazda has in store. We saw that much ourselves in spy photos and videos of the upcoming new model undergoing testing, and the company whet our appetites with the reveal of the Koeru concept at the Frankfurt Motor Show just a couple of months ago. Judging by the rendering above, it would appear that the new CX-9 will draw heavily from that design study in its production form. Naturally some details will be changed along the road from show stand to showroom, including the usual suspects like the wheel size and wing mirrors. Most notable, however, is that while the Koeru concept incorporated five seats, the CX-9 is a seven-seater – and the new model is confirmed to keep that three-row setup. Beyond that, the new CX-9 is set to apply the latest evolution of the company's Kodo design language – as seen on the aforementioned Koeru and sleek RX-Vision concepts – to a larger form. It also promises to feature Mazda's latest Skyactiv technologies to keep it up with the times. For more than that, however, we'll have to wait – but not too long, as the vehicle is set to debut mere weeks from now at the LA show. Mazda to Unveil All-New CX-9 Three-Row Midsize Crossover SUV at Los Angeles Auto Show HIROSHIMA, Japan, Nov. 4, 2015 /PRNewswire/ -- Mazda Motor Corporation announced today it will premiere the all-new Mazda CX-9 three-row midsize crossover SUV at the 2015 Los Angeles Auto Show, which runs from November 20 to 29. Fully incorporating the latest SKYACTIV technologies and KODO—Soul of Motion design, the all-new CX-9 is a high-end model of Mazda's new-generation lineup. The all-new CX-9 builds on the feeling of life imbued by KODO and moves toward a more premium design execution that befits a three-row midsize crossover SUV.