2004 BMW 645ci Convertible
19MPG
Combined
3
Trims
2004
2005 →
Updated February 27, 2026
Get the full picture on the 2004 BMW 645ci Convertible. As a Compact Sedan, it achieves 16–19 combined MPG depending on trim and has not yet been rated by NHTSA. Below you’ll find detailed specs for every trim, plus recall information and competitor comparisons.
2004 BMW 645ci Convertible Specifications
| Spec | Value |
|---|---|
| Combined MPG | 16–19 combined MPG depending on trim |
| City MPG | 16 |
| Highway MPG | 24 |
| Body Style | Compact Sedan |
| Fuel Type | Premium |
| Drive | RWD |
| Available Trims | 3 |
Available Trims
| Trim | MPG (City/Hwy/Combined) | Engine | Transmission |
|---|---|---|---|
| Man | 13/21/16 | 4.4L 8cyl | Manual 6-spd |
| 8 cyl | 16/24/19 | 4.4L 8cyl | Automatic (S6) |
| 8 cyl | 13/21/16 | 4.4L 8cyl | Automatic (S6) |
Annual Fuel Cost
Based on EPA estimates, the 2004 BMW 645ci Convertible costs approximately $3,450 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.
Compare the 2004 BMW 645ci Convertible
See how it stacks up against similar vehicles:
Other Model Years
- 2005 BMW 645ci Convertible
- 2004 (this page)
Check Vehicle History
Considering a used BMW 645ci Convertible? Get a comprehensive vehicle history report including accident records, ownership history, and more.
🔍 Check BMW 645ci Convertible Vehicle History
Check VIN →
Check Vehicle History
Check VINGet the full story — accidents, ownership, recalls, odometer, and more. Decode any VIN instantly.