MAHLE 083 25 N0 Engine Piston Ring Set Standard Bore BMW

The MAHLE 083 25 N0 is a standard bore engine piston ring set engineered as a direct OE-quality replacement for BMW applications. MAHLE is one of the world's largest OE piston and ring manufacturers, and this set is built to meet or exceed original equipment specifications for precise fit and reliable sealing performance.

This ring set features a complete ring pack — including compression rings and an oil control ring — designed to restore proper cylinder sealing, maximize combustion efficiency, and maintain optimal oil control. The rings are manufactured to exacting tolerances to match the original 85.0 mm cylinder bore diameter specification.

Key Features:

• Standard (STD) bore size — 85.0 mm cylinder bore
• Full ring pack including compression and oil control rings
• OE-quality construction meeting or exceeding BMW factory specifications
• Precision-engineered for proper ring loading and oil control
• Direct replacement for OEM BMW part number 11 25 7 559 434
• Cross-references: Goetze Engine, Wilmink Group WG1096434 / WG1104637
• Compatible with BMW N52 B30 A, N52 B30 B, N52 B30 AF, N52 B30 BF, N51 B30 A, N53 B30 A engine families

As a globally recognized supplier to the automotive industry, MAHLE brings decades of precision engineering expertise to every ring set. Choosing MAHLE ensures a restoration of factory-level compression and oil sealing performance for a long-lasting, reliable engine rebuild.