Trim / Codes

The 2003 Nissan Q45 was largely unchanged following its redesign for the 2002 model year, continuing with a 4.5-liter V8 engine paired with a five-speed automatic transmission. Trim levels included the base Q45 and the better-equipped Q45t, which added features such as larger wheels and an adjustable suspension. Common service considerations include monitoring the timing chain components, transmission fluid condition, and suspension wear, particularly on higher-mileage examples. The navigation and electrical systems from this era may also require attention as the vehicle ages.

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  2003_Q45

  The 2003 Nissan Q45 is a full-size rear-wheel-drive luxury sedan powered by a 4.5-liter VK45DE V8 producing 340 horsepower, paired with a 5-speed automatic transmission. It was offered in base and Q45t touring trims, with the Q45t featuring sport-tuned suspension and larger wheels. Typical maintenance focuses on the timing chain system, valve cover gaskets, ignition coils, and fluid service for the automatic transmission. The multi-link front and rear suspension components, including bushings and ball joints, also warrant periodic inspection.