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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.

Acura MDX teaser photos show an upscale interior

After teasing us with an exterior image of the fourth-generation Acura MDX a week ago, Acura has now followed up with images of the interior. The exterior teaser was done up in "Tron" style, but these interior shots go beyond outlines to reveal some details that are much less obscured. Acura promises the MDX will be the "most premium and performance-focused" version of the SUV yet and has earned "elevated status" as the brand's flagship. (Only about 1,000 of the RLX were sold in North America last year, vs. 52,000 of the MDX, so it seems the big sedan got demoted as flagship. Aw.) The MDX's instrument panel is lower and wider, Acura says, and the interior is trimmed out in real open-pore wood. The leather dash is "hand-wrapped" with French seams. All three rows of seating surfaces are quilted, with perforations done in a gradated design, and there is contrasting piping and stitching. Massaging front seats add to the premium experience. Acura promises a variety of new technologies in the cabin, including what it calls the Acura Precision Cockpit, along with a mighty wide-looking HD infotainment screen and Acura's dynamic ELS Studio 3D sound system with 25 speakers. (Where do they put them all?) After Acura did great things with the RDX and the new 2021 TLX, we expect the MDX redesign will follow suit in reinvigorating the brand. The MDX will likely offer the same engines as in the TLX: a 272-horsepower turbocharged 2.0-liter four-cylinder as the base engine, and a 355-horsepower turbocharged 3.0-liter V6 engine as an option. But we should know more about all of the above when the prototype Acura MDX — albeit a very-near-production prototype — will be revealed next Wednesday, Oct. 14.  Related Video:

Acura recalling nearly 20k new MDX crossovers over AWD driveshafts

Acura is recalling nearly 20,000 of its 2014 MDX crossovers fitted with all-wheel drive over driveshaft concerns. The affected vehicles were built between May 6, 2013 and October 14, 2013, and have bolts that attach the driveshaft to the transmission that may not have been tightened properly.
Needless to say, an improperly secured driveshaft could lead to a number of problems, including everything from excessive drivetrain noise to full driveshaft detachment, a condition which could result in a loss of power and crash.
There's been no reports of accidents, injuries or deaths relating to the driveshaft issues. Acura will begin notifying all 19,197 owners in question of the recall, and will request that they report in for repairs, which will consist of tightening the driveshaft-attaching bolts. Scroll down for the official bulletin from NHTSA.