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A smoother operator | 2017 Acura MDX Sport Hybrid First Drive

There's a lot to unpack when trying to understand the 2017 Acura MDX Sport Hybrid. Acura is billing it as a three-row crossover infused with NSX technology via a sport-oriented hybrid drivetrain. So it's a hybrid crossover, sure. But it doesn't comport itself like a traditional crossover, nor is it a conventional hybrid. What it is, underneath, is an intentionally subtle blend of impressive technologies doing their best to appear transparent – and it's too subtle, I fear, to be appreciated by those who'd like it the most. This is a lot of foreshadowing, but if you're not familiar with the MDX Sport Hybrid's powertrain, let's fill you in. The MDX Sport Hybrid uses the same basic system as the 2014 RLX Sport Hybrid, with some newer NSX battery tech sprinkled in, packaged neatly into the refreshed third-generation MDX platform. The system improves handling and efficiency – but more important, it smoothes out the harshness of shifts and engine stop-starts. We do need to examine the system in some detail to understand how all this affects the MDX as a whole, so let's go toe to tail. Up front is a transversely-mounted 3.0-liter V6 making 257 horsepower and 218 pound-feet of torque, as well as featuring i-VTEC and cylinder deactivation. It's slightly smaller than the 3.5-liter V6 found in the conventional MDX and many other Honda and Acura products. Attached alongside is a Honda-produced 7-speed dual-clutch transmission that has a 47 hp, 109 lb-ft electric motor-generator stuffed inside. Amidships are the battery pack and the electronics to control it, and stretching aft from there are large cables feeding power to a pair of electric motors that reside in single housing, one for each wheel. Together, they produce electron witchcraft and torque-delivery wizardry – and add 72 hp and 108 lb-ft of torque to the mix. The total system output is 321 hp and 289 lb-ft of torque – a gain of 31 hp and 22 lb-ft over the conventional MDX SH-AWD. Beyond the raw numbers, there's the remarkable subjective benefit of the Sport Hybrid's drivetrain. Engine start-stop events are quiet and smooth, nearly imperceptible when under way – in stark contrast to the too-perceptible shudder of competing engines kicking on. The electric motors (mainly the one residing in the transmission) add in power to make up for the lull during a shift, making shifts up or down seamless, as well as providing regenerative capacity.

Honda recalls 2.7 million vehicles for new air bag inflator defect

WASHINGTON — Honda said on Tuesday it will recall 2.7 million older U.S. vehicles in North America for potentially defective air bag inflators. The defect involves a different type of Takata inflator than those that have prompted the largest-ever auto safety recalls worldwide covering more than 42 million U.S. vehicles by 19 automakers with Takata air bag inflators. The new recall covers Honda and Acura automobiles from the 1996 through 2003 model years. Honda said it is aware of one field rupture of an inflator in the new recall campaign — a 2012 crash in Texas that resulted in an injury — and two in junkyards in Japan. The campaign covers 2.4 million U.S. vehicles and 300,000 in Canada, Honda said, adding that it has not determined recall numbers for other countries. Takata issued a new defect notice in November for inflators from four automakers, including Honda. Honda said all three vehicles "potentially were exposed to unusually high amounts of moisture prior to the rupture events." Honda said the recalls cover driver front airbag inflators manufactured with non-azide propellant and said "all inspections and repairs will begin in approximately one year, as replacement parts from alternative suppliers are not yet available." Honda said it "regrets any inconvenience or distress that this situation may cause to our customers as we seek to resolve this situation. Honda believes that the risk of improper airbag deployment in its vehicles remains very low at this time, but we cannot absolutely guarantee the performance of any recalled part." Related Video:

2017 Acura Model Year Preview and Updates

In what would otherwise be a model change of modest updates, Acura rewrites the rules with its all-new NSX, a high-performance hybrid reconfiguring the exotic car template. Beyond the all-new NSX, 2017 is what we've come to expect from Acura: competence, efficiency and affordability in the near-luxury segment. ACURA NSX: The all-new NSX, with a mid-engined V6 supplemented by a hybrid drivetrain and front-mounted Twin Motor Unit, provides a performance and handling dynamic rarely seen on the street - and certainly not otherwise available for the NSX's $160,000 MSRP. With a unique blend of aggressively aerodynamic design and refined yet explosive performance, the NSX effectively resides in a class of one. ACURA ILX: Acura's entry-level sedan continues for 2017 with no real changes but the addition of Lunar Silver Metallic, Modern Steel Metallic and San Marino Red exterior colors. ACURA TLX: The TLX continues into its third model year with only modest changes. New for 2017 are three new colors – San Marino Red, Lunar Silver Metallic and Modern Steel Metallic. Also, a GT package is offered for the first time. Designed to reflect Acura's ongoing interest in racing, the GT addition is a combination of Acura's underbody spoilers and your money. ACURA RLX: Modest changes on both the standard RLX and RLX Sport Hybrid. ACURA MDX: Acura's MDX enters its fourth model year with an aggressive freshening, standard front-wheel drive and AcuraWatch, a new suite of safety and driver-assistance technology available across all MDX models. Styling updates include a new grille, hood, front fenders and side sills, along with new front and rear fascias. Inside, an electric parking brake with automatic brake hold has been added. And on the top-of-the-line Advance, buyers enjoy both real wood trim and second-row captain's chairs. ACURA RDX: The 2017 model year introduces two new colors: Lunar Silver metallic and Modern Steel metallic.