King Engine Bearings MB798AM Standard Main Bearing Set for BMW M20, M50B25 and M52 Engines

King Engine Bearings BMW M20B20-23-25-27/M50B25/M52B20-25-28 Main Bearing Set - Size STD

The King Engine Bearings MB798AM Main Bearing Set is designed for BMW engines using the M20, M50B25 and M52B20, M52B25, and M52B28 engine families. Manufactured to standard bearing size, this set supports accurate crankshaft positioning and reliable engine operation during rebuilds, repairs, and performance-oriented applications.

King Engine Bearings develops precision engine bearings with carefully controlled dimensions, durable materials, and consistent manufacturing quality. The MB798AM set is intended for applications requiring standard-size main bearings and is suitable for replacing worn or damaged original components when the crankshaft remains within the manufacturer’s standard specifications. Always verify crankshaft journal condition, bearing clearance, and engine-specific requirements before installation.

Fitment includes select BMW models such as the 1991–1994 BMW 325i, 1996–1998 BMW 328i, 1999 BMW 328is, and 1999–2000 BMW Z3, along with compatible M20, M50B25, and M52 engine applications. Vehicle fitment may vary by engine configuration and production details, so confirm the engine code and bearing requirements before ordering.

Product Specifications and Technical Data

• Brand: King Engine Bearings
• Part Number: MB798AM
• Product Type: Engine main bearing set
• Bearing Size: Standard
• Engine Families: BMW M20B20, M20B23, M20B25, M20B27, M50B25, M52B20, M52B25, and M52B28
• Application: Automotive engine rebuild and repair
• Design Purpose: Crankshaft main journal support
• Package Quantity: One main bearing set

What's Included

One King Engine Bearings MB798AM standard-size main bearing set. Installation hardware, crankshaft components, seals, and additional engine parts are not included unless specified separately.

Features:

• Standard-size main bearing set for compatible BMW engine applications
• Supports precise crankshaft alignment and dependable engine operation
• Designed for BMW M20, M50B25, and M52 engine families
• Suitable for engine rebuild, maintenance, and replacement applications

Fitments:
1982 BMW 528e Base
1983 BMW 528e Base
1984 BMW 325e Base
1984 BMW 528e Base
1985 BMW 325e Base
1985 BMW 528e Base
1986 BMW 325 Base
1986 BMW 325e Base
1986 BMW 325es Base
1986 BMW 528e Base
1987 BMW 325 Base
1987 BMW 325e Base
1987 BMW 325es Base
1987 BMW 325i Base
1987 BMW 325is Base
1987 BMW 528e Base
1988 BMW 325 Base
1988 BMW 325i Base
1988 BMW 325is Base
1988 BMW 325iX Base
1988 BMW 528e Base
1989 BMW 325i Base
1989 BMW 325is Base
1989 BMW 325iX Base
1989 BMW 525i Base
1990 BMW 325i Base
1990 BMW 325is Base
1990 BMW 325iX Base
1990 BMW 525i Base
1991 BMW 325i Base
1991 BMW 325is Base
1991 BMW 325iX Base
1991 BMW 525i Base
1992 BMW 325i Base
1992 BMW 325is Base
1992 BMW 525i Base
1993 BMW 325i Base
1993 BMW 325is Base
1993 BMW 525i Base
1993 BMW 525iT Base
1994 BMW 325i Base
1994 BMW 325is Base
1994 BMW 525i Base
1995 BMW 325i Base
1995 BMW 325is Base
1995 BMW 525i Base
1996 BMW 328i Base
1996 BMW 328is Base
1997 BMW 328i Base
1997 BMW 328is Base
1997 BMW 528i Base
1997 BMW Z3 Roadster
1998 BMW 323i Base
1998 BMW 323is Base
1998 BMW 328i Base
1998 BMW 328is Base
1998 BMW 528i Base
1998 BMW Z3 Roadster
1999 BMW 323i Base
1999 BMW 323is Base
1999 BMW 328i Base
1999 BMW 328is Base
1999 BMW 528i Base
1999 BMW Z3 Coupe
1999 BMW Z3 Roadster
2000 BMW 323Ci Base
2000 BMW 323i Base
2000 BMW 328Ci Base
2000 BMW 328i Base
2000 BMW 528i Base
2000 BMW Z3 Coupe
2000 BMW Z3 Roadster

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1