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Infiniti

Infiniti - G (2003)

The Infiniti G, the flagship luxury sedan from Infiniti’s G‑lineup, first hit the market in 2001. By 2003 the model had refined its sporty styling and gained a reputation for driving comfort and strong performance. Whether you’re looking up the current Infiniti G price or curious about older models, this overview provides the details you need—plus transparent insights into depreciation and market comparisons.

  • Engine: The 2003 G models were available in three powertrains:
    • 2.3L I4 – 178 hp in the base G35
    • 3.5L V6 (G35) – 252 hp, 240 lb-ft torque
    • 3.5L Turbocharged V6 (G35t) – 310 hp, 280 lb-ft torque
  • Transmission: 6‑speed manual or 4‑speed automatic (depending on trim).
  • Fuel Type: Regular gasoline (87 octane) or premium (89 octane).
  • Dimensions:
    • Wheelbase: 112.8 in
    • Length: 184.8 in
    • Width: 71.5 in
    • Height: 60.9 in
  • Seating Capacity: 5 passengers.
  • Safety Features: Dual‑zone ABS, four‑sensor traction control, front airbags, side‑air bags, optional anti‑lock brakes, and a driver’s side air bag.
  • Drive Configuration: Front‑wheel drive (all G35* models) – true to Infiniti’s focus on balanced handling.
  • Infotainment: 6‑point audio system, CD/MP3 player, optional navigation, Bluetooth connectivity in later trims.
  • Warranty: 3‑year/36,000‑mile basic coverage, with full-body and powertrain coverage extending to 5 years/60,000 mi.

Infiniti G depreciation remains an important factor for both new and used buyers. A rule of thumb for the luxury sedan class is that vehicles lose about 15‑20 % of their value during the first year, then roughly 10‑15 % each subsequent year for the next three years. Applied to a 2003 Infiniti G, these percentages translate to:

  • First‑year loss: ~15‑20 % of the original MSRP.
  • Second year: Additional 10‑15 % drop from the first‑year value.
  • Years 3‑5: A steady decline of about 5‑7 % per year.

Because the G line was available in multiple trim levels and engine configurations, actual depreciation curves can vary. For example, the high‑performance G35t typically spots a slightly slower drop in resale value compared to the base G35 model because of its strong aftermarket support.

But the key question for many buyers: what is a 2003 Infiniti G worth today? While exact figures differ by condition, mileage, and region, normal market observations note that a well‑maintained 2003 G with moderate mileage (around 100‑120k mi) often trades between one‑third to one‑half of its original MSR​E value in the United States. In other markets such as the UK or Australia, depreciation scales similarly but adjusted for local taxes and demand.

Comparison Context

The Infiniti G competes directly with other luxury sedan offerings that debuted around the same time, such as the Acura TL, Lexus IS, and a few early BMW 3‑Series models. When compared side‑by‑side: