ACL BMW M20/M50/M52/M54 Main Bearing Set - .25 Oversized — Fits 1982-2006 BMW

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SKU: ACL7M1532H-.25
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About ACL

ACL engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full ACL lineup with fast shipping and expert fitment support — order with confidence.

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ACL Performance Main Bearing Set for BMW M-Series Engines

Restore your BMW's engine to peak condition with this high-performance, .25 oversized main bearing set from ACL. Designed specifically for the popular M20, M50, M52, and M54 engine families, these bearings are essential for engine rebuilds or performance upgrades. They ensure proper crankshaft support and lubrication, critical for maintaining engine health and power output under various driving conditions.

Precision Engineered for Performance:

  • BMW M-Series Specific: Tailored for M20, M50, M52, and M54 engines, guaranteeing a precise fit and optimal function.
  • .25 Oversized: Ideal for crankshafts that have been machined to a .25mm (0.010 inch) undersize, or for engines needing this specific clearance.
  • Optimized Lubrication: Engineered to maintain correct oil clearance, ensuring consistent lubrication and reducing wear.
  • Robust Construction: Made with high-quality materials to endure the stresses of performance driving and prolonged use.
  • Enhanced Engine Life: Contributes to the longevity of your engine by providing superior bearing protection.

Extensive Vehicle Fitment:

This ACL main bearing set is compatible with a wide array of BMW models, including:

  • BMW 3 Series (E30, E36, E46) such as 323i, 325i, 325is, 328i, M3
  • BMW 5 Series (E28, E34, E39) including 525i, 528e, 528i, 530i
  • BMW X3 (E83)
  • BMW X5 (E53)

Don't compromise on engine reliability. Choose ACL for your next engine build or repair. Get your .25 oversized main bearing set today at GGCRACING!

Vehicle Fitment

Years Make Model Trim
2000 BMW 323Ci Base
1998-2000 BMW 323i Base
1998-1999 BMW 323is Base
1986-1988 BMW 325 Base
2001-2006 BMW 325Ci Base
1984-1987 BMW 325e Base
1986-1987 BMW 325es Base
1987-1995 BMW 325i Base
2001-2005 BMW 325i Base
1987-1995 BMW 325is Base
2001-2005 BMW 325xi Base
2000 BMW 328Ci Base
1996-2000 BMW 328i Base
1996-1999 BMW 328is Base
2001-2006 BMW 330Ci Base
2001-2005 BMW 330i Base
2001-2005 BMW 330xi Base
1985-1986 BMW 524td Base
1989-1995 BMW 525i Base
2001-2005 BMW 525i Base
1982-1988 BMW 528e Base
1997-2000 BMW 528i Base
2001-2005 BMW 530i Base
1996-1999 BMW M3 Base
2001-2006 BMW M3 Base
2004-2005 BMW X3 2.5i
2004-2006 BMW X3 3.0i
2001-2006 BMW X5 3.0i
1997-2002 BMW Z3 Roadster
1999-2002 BMW Z3 Coupe
1999-2002 BMW Z3 M Coupe
2003-2005 BMW Z4 2.5i
2003-2005 BMW Z4 3.0i
2006-2008 BMW Z4 M Coupe
2006-2008 BMW Z4 M Roadster

Product Details

Product Description
Part Numbers
Sizing & Fit

About ACL

ACL engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full ACL lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

ACL Performance Main Bearing Set for BMW M-Series Engines

Restore your BMW's engine to peak condition with this high-performance, .25 oversized main bearing set from ACL. Designed specifically for the popular M20, M50, M52, and M54 engine families, these bearings are essential for engine rebuilds or performance upgrades. They ensure proper crankshaft support and lubrication, critical for maintaining engine health and power output under various driving conditions.

Precision Engineered for Performance:

  • BMW M-Series Specific: Tailored for M20, M50, M52, and M54 engines, guaranteeing a precise fit and optimal function.
  • .25 Oversized: Ideal for crankshafts that have been machined to a .25mm (0.010 inch) undersize, or for engines needing this specific clearance.
  • Optimized Lubrication: Engineered to maintain correct oil clearance, ensuring consistent lubrication and reducing wear.
  • Robust Construction: Made with high-quality materials to endure the stresses of performance driving and prolonged use.
  • Enhanced Engine Life: Contributes to the longevity of your engine by providing superior bearing protection.

Extensive Vehicle Fitment:

This ACL main bearing set is compatible with a wide array of BMW models, including:

  • BMW 3 Series (E30, E36, E46) such as 323i, 325i, 325is, 328i, M3
  • BMW 5 Series (E28, E34, E39) including 525i, 528e, 528i, 530i
  • BMW X3 (E83)
  • BMW X5 (E53)

Don't compromise on engine reliability. Choose ACL for your next engine build or repair. Get your .25 oversized main bearing set today at GGCRACING!

Vehicle Fitment

Years Make Model Trim
2000 BMW 323Ci Base
1998-2000 BMW 323i Base
1998-1999 BMW 323is Base
1986-1988 BMW 325 Base
2001-2006 BMW 325Ci Base
1984-1987 BMW 325e Base
1986-1987 BMW 325es Base
1987-1995 BMW 325i Base
2001-2005 BMW 325i Base
1987-1995 BMW 325is Base
2001-2005 BMW 325xi Base
2000 BMW 328Ci Base
1996-2000 BMW 328i Base
1996-1999 BMW 328is Base
2001-2006 BMW 330Ci Base
2001-2005 BMW 330i Base
2001-2005 BMW 330xi Base
1985-1986 BMW 524td Base
1989-1995 BMW 525i Base
2001-2005 BMW 525i Base
1982-1988 BMW 528e Base
1997-2000 BMW 528i Base
2001-2005 BMW 530i Base
1996-1999 BMW M3 Base
2001-2006 BMW M3 Base
2004-2005 BMW X3 2.5i
2004-2006 BMW X3 3.0i
2001-2006 BMW X5 3.0i
1997-2002 BMW Z3 Roadster
1999-2002 BMW Z3 Coupe
1999-2002 BMW Z3 M Coupe
2003-2005 BMW Z4 2.5i
2003-2005 BMW Z4 3.0i
2006-2008 BMW Z4 M Coupe
2006-2008 BMW Z4 M Roadster

Product Details

Product Description

About ACL

ACL engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full ACL lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

ACL Performance Main Bearing Set for BMW M-Series Engines

Restore your BMW's engine to peak condition with this high-performance, .25 oversized main bearing set from ACL. Designed specifically for the popular M20, M50, M52, and M54 engine families, these bearings are essential for engine rebuilds or performance upgrades. They ensure proper crankshaft support and lubrication, critical for maintaining engine health and power output under various driving conditions.

Precision Engineered for Performance:

  • BMW M-Series Specific: Tailored for M20, M50, M52, and M54 engines, guaranteeing a precise fit and optimal function.
  • .25 Oversized: Ideal for crankshafts that have been machined to a .25mm (0.010 inch) undersize, or for engines needing this specific clearance.
  • Optimized Lubrication: Engineered to maintain correct oil clearance, ensuring consistent lubrication and reducing wear.
  • Robust Construction: Made with high-quality materials to endure the stresses of performance driving and prolonged use.
  • Enhanced Engine Life: Contributes to the longevity of your engine by providing superior bearing protection.

Extensive Vehicle Fitment:

This ACL main bearing set is compatible with a wide array of BMW models, including:

  • BMW 3 Series (E30, E36, E46) such as 323i, 325i, 325is, 328i, M3
  • BMW 5 Series (E28, E34, E39) including 525i, 528e, 528i, 530i
  • BMW X3 (E83)
  • BMW X5 (E53)

Don't compromise on engine reliability. Choose ACL for your next engine build or repair. Get your .25 oversized main bearing set today at GGCRACING!

Vehicle Fitment

Years Make Model Trim
2000 BMW 323Ci Base
1998-2000 BMW 323i Base
1998-1999 BMW 323is Base
1986-1988 BMW 325 Base
2001-2006 BMW 325Ci Base
1984-1987 BMW 325e Base
1986-1987 BMW 325es Base
1987-1995 BMW 325i Base
2001-2005 BMW 325i Base
1987-1995 BMW 325is Base
2001-2005 BMW 325xi Base
2000 BMW 328Ci Base
1996-2000 BMW 328i Base
1996-1999 BMW 328is Base
2001-2006 BMW 330Ci Base
2001-2005 BMW 330i Base
2001-2005 BMW 330xi Base
1985-1986 BMW 524td Base
1989-1995 BMW 525i Base
2001-2005 BMW 525i Base
1982-1988 BMW 528e Base
1997-2000 BMW 528i Base
2001-2005 BMW 530i Base
1996-1999 BMW M3 Base
2001-2006 BMW M3 Base
2004-2005 BMW X3 2.5i
2004-2006 BMW X3 3.0i
2001-2006 BMW X5 3.0i
1997-2002 BMW Z3 Roadster
1999-2002 BMW Z3 Coupe
1999-2002 BMW Z3 M Coupe
2003-2005 BMW Z4 2.5i
2003-2005 BMW Z4 3.0i
2006-2008 BMW Z4 M Coupe
2006-2008 BMW Z4 M Roadster

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