2005 BMW 645ci: trims, real prices & how to pick yours

2 builds left the factory as a 2005 645ci, each a different combination of engine, transmission and body identified by the first eight characters of its VIN. The 2 main configurations sell for $4,200–$22,000 today.

  • 2 main configurations
  • 1,704 vehicles built
  • 37 for sale right now
  • $4,200–$22,000 typical price range

Which 645ci is yours?

Enter a VIN — the 17 characters on the windshield or the title — and we’ll match it to its exact factory configuration, typical price and equipment.

Works with any VIN — a different year or model takes you straight to its own page.

Pick your 645ci

What actually differs

CI Automatic Base configuration
Body Convertible Coupe
Typical price today $9,999 $9,000
For sale right now 27 10
Vehicles built 1,077 627
Same on every 2005 645ci
  • Engine 4.4L 8-cyl
  • Power 325 hp
  • Fuel Gasoline
  • Doors 2-door

What people actually pay

36 price observations · updated Sep 6, 2026
CI Automatic
$9,999
$4,074 $8,721 $13,367 $18,014 $22,660
Cost to run

16/24 mpg city/highway. Roughly $2,450/yr on fuel at 15,000 miles.

EPA estimate for the 2005 645ci

Safety, in plain English

What WBAEK734-5 means

WBA EK734 · 5
WBA
the World Manufacturer Identifier BMW registered — assembled in Germany
EK734
together encode the 645Ci line — Convertible, 4.4L 8cyl — as BMW filed it, these five characters are read as one block, not letter by letter
5
in position 10 — model year 2005
9, 11–17
differ on every car: check digit, plant code and the serial number
Real VINs from this run WBAEK734 75B326748 WBAEK734 X5B323312

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2005 BMW 645ci prices →