2003 Acura MDX

When the Acura MDX sport utility debuted as a 2001 model, the automotive press gave it rave reviews—and buyers flocked to Acura dealers to purchase MDXs in droves. Yet, even with this success, Acura isn't resting on its accomplishments. Instead, Acura engineers have been hard at work improving the already great MDX package only two short years after its introduction.

The MDX's body, with its wide stance, is unchanged for 2003 and continues to convey the look of strength and stability.

Leading the changes to the 2003 MDX are several improvements to the 3.5 liter, 24-valve, all-aluminum, VTEC V-6 engine. Like most engines, the more air that can be moved through an engine, the more power it can potentially make. Acura's engine development gurus found this to be true when they improved the exhaust flow on the MDX engine. The retooled system includes two close-coupled primary catalytic converters, a secondary underfloor catalytic converter, and larger diameter exhaust pipes. These refinements increase exhaust flow by 40 percent. When combined with new integrated cylinder heads and shorter intake manifold ports, horsepower is boosted from 240 to 260, while torque goes from 242 lb-ft to 250 lb.-ft. These numbers are more than worthy and even rival some V-8 engines from other manufacturers. Add in new, orifice-type fuel injectors, and the MDX is the first SUV to meet stringent ULEV-2 emissions standards. In addition, the new engine helps deliver what Acura says is best-in-class fuel economy of 17-mpg city and 23-mpg highway.


The 2003 MDX also features a new drive-by-wire throttle system that's similar to the system used by the Acura NSX sports car. The new setup eliminates the need for a mechanical connection between the accelerator pedal and the engine. Acura says that it's been custom tailored to meet the unique demands of SUV drivers by controlling the throttle during transmission shifts and operating the cruise control system for improved driving smoothness. The drive-by-wire throttle system also allows for throttle control to be incorporated into the MDX's Vehicle Stability Assist (VSA) system. This 4-channel system orchestrates the throttle and each of the vehicle's four disc brakes to integrate traction control, Anti-lock braking, and stability enhancement for increased driver control. During our test, the system worked seamlessly and is virtually unnoticed during regular driving conditions.

For 2003, the optional Acura Navigation System gets a variety of new features and greatly enhanced capabilities.

To handle the increased engine power, the MDX receives an all-new, 5-speed automatic transmission. This new 4-shaft gearbox is smaller than the previous transmission and features increased torque capacity and reduced gear noise for quieter operation. In addition to an improvement in power, the MDX's suspension has been retuned to deliver an even smoother ride while maintaining a precise, confidence-inspiring level of handling. To accomplish this, the rear spring rates were increased while damping rates in both the front and the rear where reduced. New rear shock valves were adopted to enable more precise control of damping throughout the suspension movement. At the same time, dynamic torsional rigidity of the body has been increased 35 percent by reinforcing the rear wheelhouse, tailgate and rear subframe.


The MDX's body, with its wide stance, is unchanged and continues to convey the look of strength and stability. It's now available in three new colors: Midnight Blue Pearl, Sage Brush Pearl and Sandstone Metallic. In addition, the MDX receives redesigned alloy wheels and standard rear mudguards-both welcome improvements.