Engine Identification
NOTE:
For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section.
Displacement and identification numbers are on top rear of engine block on bellhousing flange.
ENGINE IDENTIFICATION CODES
| Application | Engine Code |
|---|---|
| 1989 635CSi | M30B34 |
| 1989-90 535i, 735i & 735iL | M30B35M |
CAUTION:
Before performing any work on vehicles equipped with Supplemental Restraint System (SRS), disconnect SRS control unit. Use extreme caution when testing or repairing any electrical equipment on or around steering column (air bag might deploy).