2003 Pontiac Bonneville

Full-Size Sedan Premium
Pontiac Bonneville 2003
21MPG Combined
2 Trims
← 2002 2003 2004 →
Updated February 27, 2026

The 2003 Pontiac Bonneville Full-Size Sedan provides 19–21 combined MPG depending on trim. We’ve compiled EPA fuel economy data, NHTSA safety ratings, and recall history so you can make an informed decision.

2003 Pontiac Bonneville Specifications

SpecValue
Combined MPG19–21 combined MPG depending on trim
City MPG17
Highway MPG27
Body StyleFull-Size Sedan
Fuel TypePremium
DriveFWD
Available Trims2

Available Trims

TrimMPG (City/Hwy/Combined)EngineTransmission
Auto16/25/193.8L 6cylAutomatic 4-spd
Auto17/27/213.8L 6cylAutomatic 4-spd

Annual Fuel Cost

Based on EPA estimates, the 2003 Pontiac Bonneville costs approximately $2,575 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.

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