Engine Identification
All engines have a serial number stamped on left side of block above starter motor. Engines can also be identified by first 4 numbers in chassis code, stamped on sill above right front wheel on 325 Series, 528e and 535i, and on firewall for 635CSi, 735i & L7.
ENGINE CODE
| Application | Code | ||
|---|---|---|---|
| 325 series | |||
| 2 Door | |||
| Man. Trans | 1254 | ||
| Auto. Trans | 1264 | ||
| 4 Door | |||
| Man. Trans | 1554 | ||
| Auto. Trans | 1564 | ||
| 528e | |||
| Man. Trans. | 4073 | ||
| Auto. Trans. | 4083 | ||
| 535i | |||
| Man. Trans. | DC 74 | ||
| Auto. Trans. | DC 84 | ||
| 635CSi | |||
| Man. Trans. | 5374 | ||
| Auto. Trans. | 5384 | ||
| 735i & L7 | |||
| Man. Trans. | 6874 | ||
| Auto. Trans. | 6884 | ||