For an early BMW 645Ci coupe, identify the transmission and installed equipment before judging the asking price. The original model offered substantially different control and transmission choices. This guide focuses on the E63-era 645Ci coupe, not every later car carrying a 6 Series badge.
Begin with the transmission
BMW’s April 2004 U.S. launch information lists three six-speed choices for the 645Ci: manual, STEPTRONIC automatic and Sequential Manual Gearbox (SMG). It also describes the 4.4-liter V8. Keep those period, market-specific details separate from later 650i or M6 specifications. Ask for the original equipment record and have a specialist confirm the installed gearbox, especially if the seller mentions a conversion.
Scroll horizontally on a narrow screen. Keyboard users can focus the table region and use the arrow keys.
| Configuration | Clarify before inspection | Observation to record |
|---|---|---|
| Manual | Factory identity, clutch-related invoices and any conversion | Clutch engagement and shift behavior under the inspector’s chosen conditions. |
| STEPTRONIC automatic | Exact transmission, service and repair evidence | Selection delay, shift quality and warning messages, with temperature and conditions. |
| SMG | Correct operating instructions, repair and diagnostic records | Engagement and change behavior in the documented modes; specialist interpretation is essential. |
SMG is an automated manual arrangement; it should not be assessed simply as a conventional automatic with a different selector. Learn the correct controls before a trial. A symptom description is more useful than deciding from a single shift that a particular component has failed.
Check the options you will actually use
BMW’s December 2003 U.S. debut announcement describes Active Roll Stabilization and available features including Active Steering. Their names are not interchangeable. Record each installed system using build data, the manual and inspection evidence. If wheels, suspension or steering components have been changed, request the complete parts and installation record.
In a parked check, work through seat adjustment, climate zones, windows, mirrors, central controls, audio and roof functions according to the manual. Check that keys and required wheel-lock tools are present. Photograph warnings and note which functions were tested; do not let a seller clear messages before the inspection record is made.
Read maintenance as a chronology
Create one line per invoice: date, mileage and units, work performed, parts and fluids identified, and who did the work. Then have the specialist compare it with the correct BMW service information. An attractive stamped book can establish visits while leaving the scope of each visit uncertain; itemized invoices answer a different question.
Ask the inspector to assess leakage, cooling-system condition, driveline, suspension, brakes, tires and structural repair evidence. Request diagnostic results together with the conditions of the scan and any further tests recommended. A clean generic code scan does not certify all the vehicle’s systems.
The FTC’s used-car guidance recommends an independent inspection; a vehicle-history report does not replace it. Ask for findings, limitations and written estimates before deciding.
Compare usable cars, not lists of equipment
Record unresolved work as immediate, scheduled or optional, using the inspector’s explanation. Obtain quotes with parts availability and exclusions. Add transport and an initial service baseline to your purchase plan, while keeping desired cosmetic upgrades separate. This gives each candidate the same comparison boundary.
Close the remaining evidence gaps
For U.S. cars, check NHTSA recalls and manufacturer campaign records. VIN results omit completed repairs and may omit campaigns over 15 years old.
Keep your transmission identity, option list, service chronology and inspection report as the starting ownership file. Recheck any unsupported listing claim before relying on it in the purchase decision.
Save a working record
Download the working record (plain text). Open it in a text editor and save a private copy. Fill in the prompts, write “unknown” where evidence is missing, and attach the documents behind each conclusion. It includes this article’s address and source links.