This MAHLE piston ring set (part number 081 21 N0) replaces the compression and oil-control rings that seal the combustion chamber, control oil film on the cylinder wall, and transfer heat from the piston to the bore. It fits BMW 325i/325is/325iX/525i/528e applications listed in the fitment table below. MAHLE built its reputation on piston and filtration engineering over more than a century and supplies these parts at OE quality across European applications.
Technical Details
- Manufacturer part number: 081 21 N0
- Part type: Piston Ring Set
- Vehicle system: engine cylinder assembly
Fitment & Compatibility
Use the fitment table below to confirm year, make, model, submodel, and any application notes before ordering.
With over 20 years working on European applications and fitment, PMB Performance can help you confirm the right part. Reach out with your VIN if the application needs checking.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1987 | BMW | 325i | ||
| 1988 | BMW | 325i | ||
| 1989 | BMW | 325i | ||
| 1990 | BMW | 325i | ||
| 1991 | BMW | 325i | ||
| 1992 | BMW | 325i | ||
| 1992 | BMW | 325i | ||
| 1993 | BMW | 325i | ||
| 1987 | BMW | 325is | ||
| 1988 | BMW | 325is | ||
| 1989 | BMW | 325is | ||
| 1990 | BMW | 325is | ||
| 1991 | BMW | 325is | ||
| 1992 | BMW | 325is | ||
| 1988 | BMW | 325iX | ||
| 1989 | BMW | 325iX | ||
| 1990 | BMW | 325iX | ||
| 1991 | BMW | 325iX | ||
| 1989 | BMW | 525i | ||
| 1990 | BMW | 525i | ||
| 1991 | BMW | 525i | ||
| 1992 | BMW | 525i | ||
| 1993 | BMW | 525i | ||
| 1987 | BMW | 528e | ||
| 1988 | BMW | 528e |