The 2003 Acura MDX comes equipped with a 3.5-liter SOHC V6 engine producing 240 horsepower and 245 lb-ft of torque. This J35A3 engine features Honda’s VTEC variable valve timing system and aluminum construction for reduced weight. The engine is paired with a 5-speed automatic transmission and Acura’s VTM-4 all-wheel-drive system as standard equipment. This powerplant provides adequate performance for the MDX’s size, delivering 0-60 mph acceleration in approximately 8.5 seconds while maintaining reasonable fuel economy ratings of 17 city and 23 highway mpg.

The 2003 Acura MDX shares most parts with the 2001-2006 first-generation MDX models. Engine components, transmission parts, suspension pieces, and body panels are largely interchangeable across these years. Some minor variations exist in trim pieces and electronic modules between early 2001-2002 models and later 2003-2006 versions. The 3.5L J35A3 engine remained consistent throughout this generation, making powertrain components highly compatible. Interior parts like seats, door panels, and dashboard components also interchange well within the 2001-2006 range, though color and trim options may vary by model year.

Parts availability changes daily. Call us at (603) 392-7313 or visit our online shop to check current inventory from this specific vehicle. If we have sold a part you need, our Parts Broker service can source it from our network of partner yards nationwide.

Yes! We ship parts from this vehicle and our entire inventory nationwide. Most orders ship within 1-2 business days via FedEx or freight carriers for larger components like engines and transmissions. Call (603) 392-7313 for a shipping quote on any part.

The 3.5L J35A3 V6 engine in the 2003 MDX is generally reliable when properly maintained, though it has some known weaknesses. The engine itself rarely experiences major internal failures, but the timing belt must be replaced every 105,000 miles to prevent catastrophic damage since this is an interference engine. Oil changes every 5,000 miles are critical, as the VTEC system relies on clean oil for proper operation. The engine is sensitive to overheating, so maintaining the cooling system is essential. Common issues include oil leaks from valve cover gaskets around 100,000 miles and occasional VTEC solenoid problems. With proper maintenance, these engines can easily exceed 200,000 miles.