What does 'Standard Size' mean for these bearings?

Standard size bearings are meant for engines that have not been machined to an undersize. If your crankshaft has been reconditioned or is worn beyond its original specifications, you may need an undersize bearing set. These are the factory-spec size.

What is the benefit of a lead-free composite material?

Lead-free composites are used for environmental safety and can offer good performance in medium-load engines. They are designed to provide reliable operation without the use of lead, which is often restricted in automotive components.

What is the typical application for these bearings?

These bearings are ideal for medium-load engines, such as those found in many BMW models. They are designed to handle the normal stresses of daily driving and moderate performance use.

Specifications

Brand: King Engine Bearings
Part #: MB7776SI
UPC: 611500587269

King Engine Bearings BMW N55B30A/N53B30A/N52B30A Main Bearing Set - Size STD

Name: King Engine Bearings BMW N55B30A/N53B30A/N52B30A Main Bearing Set - Size STD
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-n55b30a-n53b30a-n52b30a-main-beari-t14-45774
Price: 85.16 USD
Availability: InStock

$85.16

In Stock

King Engine Bearings main bearing set for BMW N55, N53, and N52 engines. Standard size. Built with a lead-free composite for medium-load engines.

Key Features

Fits a wide range of BMW vehicles including the 1 Series, 3 Series, and X5.
Standard size main bearing set.
Constructed with a lead-free, environmentally safe composite material.
Features a bi-metal aluminum construction.
Ideal for medium-load engine applications.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Built with a lead-free, environmentally safe composite material, this main bearing set from King Engine Bearings is a solid option for BMW engines like the N55B30A, N53B30A, and N52B30A. These bearings are designed for medium-load applications, making them a reliable choice for many BMW models including the 1 Series, 3 Series, and X5.

King Engine Bearings has been specializing in engine bearings since 1960, focusing on supplying well-built components. This particular set utilizes a bi-metal aluminum material, which is a common and effective choice for main bearings due to its strength and ability to handle the stresses within the engine's rotating assembly. The standard size ensures a direct fit for engines that haven't been machined to an undersize.