BMW diagram reference
Crankshaft-Pistons for BMW 3 Series E21 315 (1980)
Use this BMW diagram reference when you know the component location or position number and need to identify the OEM part number, quantity, and notes.
Diagram reference
Use the position table
This page does not display a diagram image while image-source permission is unverified. Use the position numbers and part table to identify candidate BMW part numbers.
| No. | Part number | Description | Qty | Notes |
|---|---|---|---|---|
| 01 | 11251274972 | Piston | 4 | ENDED |
| 01 | 11251274973 | Piston | 4 | ENDED |
| 01 | 11251276521 | Nueral/alcan piston | 4 | ENDED |
| 01 | 11251276522 | Nueral/alcan piston | 4 | ENDED |
| 01 | 11251286996 | Mahle piston | 4 | ENDED |
| 01 | 11251286997 | Mahle piston | 4 | ENDED |
| 01 | 11251286998 | Mahle piston | 4 | ENDED |
| 01 | 11251286999 | Mahle piston | 4 | ENDED |
| 01 | 411251274970 | Piston | 4 | ENDED |
| 01 | 411251274971 | Piston | 4 | ENDED |