Photo: BMW 6 Series by Dinkun Chen, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.
BMW · model year 2004
2004 BMW 645ci
Subcompact · Rear-Wheel Drive · Gas · EPA class: Subcompact Cars
EPA figures · 2004fueleconomy.gov
17MPG combined
15/22MPG city / highway
$4,850fuel a year
523 g CO₂ per mile 4.4 L 8-cyl Automatic (S6)
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Every figure on record
- Combined MPG
- 17 MPG
- City MPG
- 15 MPG
- Highway MPG
- 22 MPG
- Annual fuel cost
- $4,850
- Tailpipe CO₂
- 523 g per mile
- Model year
- 2004
- Body
- Car
- EPA size class
- Subcompact Cars
- Drive
- Rear-Wheel Drive
- Engine
- 4.4 L 8-cyl
- Transmission
- Automatic (S6)
- Fuel
- Gasoline
Efficiency
Running cost
The car
Powertrain
More BMW model years
2004 BMW 530i
20 MPG · $4,100 fuel a year 2004 BMW 545i
18 MPG · $4,550 fuel a year 2004 BMW 545i
19 MPG · $4,350 fuel a year 2004 BMW 545i
17 MPG · $4,850 fuel a year 2004 BMW 645ci
18 MPG · $4,550 fuel a year 2004 BMW 645ci
19 MPG · $4,350 fuel a year 2004 BMW 645ci Convertible
16 MPG · $5,150 fuel a year