Piston Kit for BMW E60 E87 E90 118i 120i 320i 520i X3 (N46B20B)
This Standard (STD) piston kit for the BMW N46 (2.0L) engine—specifically corresponding to OE part numbers 11257562453 or 11257548035—is designed for cylinders with an 84.00mm bore. The kit typically features a 20mm piston pin diameter, a 50mm piston pin length, and a 29.5mm compression height, utilizing a three-ring design with specifications of 1.2mm, 1.5mm, and 2.0mm, respectively.
Description
BMW N46 2.0L Standard Piston Kit — Key Specifications:
Bore: 84.00mm (Standard)
Piston Pin Diameter: 20mm
Piston Pin Length: 50mm
Compression Height: 29.5mm
Piston Ring Thickness: Top Ring: 1.2mm, Second Ring: 1.5mm, Oil Ring: 2.0mm
Material: ZL109 Aluminum Alloy
Engine Compatibility: N46B20, N46N (1995cc)
Common OE Part Numbers: 11257562453, 11257548035, 11257506023
Included Components: Piston (with piston rings and piston pin)
The OE number is: 11257562451














