1980 Mazda Rx-7 on 2040-cars

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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.

J.D. Power dependability survey is out, but you shouldn't depend on it

J.D. Power has just released its latest automotive dependability survey, which of course has usual suspects Buick and Lexus ranking high. Those are safe and solid findings, surely. But when you look a little closer, there are curiosities. Our Consumer Editor, Jeremy Korzeniewski, offered an explanation a couple of years back for why this survey should be viewed with a degree of skepticism, and his take is worth a re-read. What jumped out at Jeremy were the relatively low spots assigned to Mazda, Subaru and Scion among the ranking of makes. Back in 2016 when he wrote his piece, they were ranked 21st, 23rd and 24th respectively. In this year's survey, Mazda ranks 15th and Subaru 26th, both below the industry average of 142 reported problems per 100 vehicles. (And Scion, of course, is in car-brand heaven.) Now, part of what is going on here is surely the fact that all automotive brands are producing dependable vehicles compared with years gone by, so the degree of variance between the best and worst on the list is not as great as it once was. "For the most part, automotive manufacturers continue to meet consumers' vehicle dependability expectations," Dave Sargent, a J.D. Power vice president, said in a statement. "A 9 percent improvement is extremely impressive, and vehicle dependability is, without question, at its best level ever." That said, when a brand like Subaru, regarded by many as mechanically bulletproof, ranks 26th, it leaves people who know cars scratching their heads. Something there does not compute. The problem, as Jeremy pointed out, is one of methodology: When he wrote his piece, there was no weighting assigned to the problems reported in the survey. And that still appears to be the case. Therefore, a problem with an infotainment system or a loose piece of trim is deemed as serious as a blown engine or leaky transmission. (And yes, infotainment is still the biggest problem across the board.) Jeremy's point: If the categories of problems were weighted, you'd see a different picture. When you look at the Consumer Reports brand rankings (subscription required), you get a very different picture. in CR's rankings, Subaru is No. 6 among brands, which, well, sounds a lot more like it. CR singles out the redesigned 2017 Impreza as a car with some new-model problems. (The BRZ had the fewest.) The two surveys jibe a little more closely when it comes to Mazda, which CR ranks 12th, a drop of six places from previous-year rankings.

Tougher than steel: Wood pulp could make lighter auto parts

KYOTO, Japan — The global push among carmakers to make ever lighter vehicles is leading some auto suppliers in Japan to turn to what seems like an unlikely steel substitute — wood pulp. Japanese researchers and auto component makers say a material made from wood pulp weighs just one-fifth of steel and can be five times stronger. The material - cellulose nanofibers — could become a viable alternative to steel in the decades ahead, they say, although it faces competition from carbon-based materials, and remains a long way from being commercially viable.> Related: Jay Leno drives the Renew cannabis car — hemp you can't dent Reducing the weight of a vehicle will be critical as manufacturers move to bring electric cars into the mainstream. Batteries are an expensive but vital component, so a reduction in car weight will mean fewer batteries will be needed to power the vehicle, saving on costs. "Lightweighting is a constant issue for us," said Masanori Matsushiro, a project manager overseeing body design at Toyota. "But we also have to resolve the issue of high manufacturing costs before we see an increased use of new, lighter-weight materials in mass-volume cars."A NEW PROCESS Researchers at Kyoto University and major parts suppliers such as Denso Corp, Toyota's biggest supplier, and DaikyoNishikawa Corp, are working with plastics incorporated with cellulose nanofibers — made by breaking down wood pulp fibers into several hundredths of a micron (one thousandth of a millimeter). Cellulose nanofibers have been used in a variety of products ranging from ink to transparent displays, but their potential use in cars has been enabled by the "Kyoto Process," under which chemically treated wood fibers are kneaded into plastics while simultaneously being broken down into nanofibers, slashing the cost of production to roughly one-fifth that of other processes. "This is the lowest-cost, highest-performance application for cellulose nanofibers, and that's why we're focusing on its use in auto and aircraft parts," Kyoto University Professor Hiroaki Yano, who is leading the research, told Reuters in an interview. The university, along with auto parts suppliers, are currently developing a prototype car using cellulose nanofiber-based parts to be completed in 2020.