King MB5863MC MC K-340 Polymer Main Bearing Set Toyota 3UR-FE 5.7L V8 2007-2022

Vehicle Fitment

• 2007-2021 Toyota Tundra (SR, SR5, Limited, Platinum, 1794 Edition, TRD Pro, RWD/4WD, 5.7L V8 3UR-FE / 3UR-FBE)
• 2008-2022 Toyota Sequoia (SR5, Limited, Platinum, TRD Pro, RWD/4WD, 5.7L V8 3UR-FE / 3UR-FBE)
• 2008-2021 Toyota Land Cruiser (Base, Heritage Edition, 4WD, 5.7L V8 3UR-FE)
• 2008-2021 Lexus LX570 (Base, Sport, Black Edition, Two-Row, Three-Row, 4WD, 5.7L V8 3UR-FE)

Fitment Notes

• Fits Toyota 3UR-FE and 3UR-FBE (E85 Flex-Fuel variant) 5.7L V8 engines only - does not fit the 4.6L 1UR-FE or other UR-family engines
• Standard (STD) size - for use on crankshafts at factory main journal diameter; always measure journals before ordering
• MC Series = bi-metal aluminum base structure with K-340 nano-composite polymer coating; OE-replacement grade optimized for cold-start and stop-stop conditions
• 3UR-FBE (E85 Flex-Fuel) variant available as option on 2009-2014 Tundra and 2009-2014 Sequoia - confirmed fitment
• Available in +0.25mm and +0.50mm undersizes under separate part numbers for ground crankshafts

Features

• MC Series bi-metal aluminum structure with K-340 nano-composite polymer coating for excellent anti-friction and wear resistance, particularly during cold starts and oil starvation events
• Polymer coating applied at the factory with no added wall thickness - maintains original precision oil clearance
• Engineered for modern start-stop and cold-start conditions where metal-to-metal contact is most likely to cause accelerated wear
• Lead-free construction meets current environmental compliance standards
• Superior seizure resistance during oil starvation events vs. uncoated bi-metal bearings
• Full 5-pair set covers all main crankshaft journals in the V8 engine
• Tight wall thickness tolerances ensure consistent oil clearance across all 5 main journals
• Manufactured under IATF 16949 and SAE AS 9100 certified quality control

Specifications

• Part Number: MB5863MC
• Size: Standard (STD)
• Series: MC (Bi-Metal Aluminum + K-340 Nano-Composite Polymer Coating - OE Replacement)
• Engine: Toyota 3UR-FE / 3UR-FBE 5.7L V8 (DOHC, 32-Valve, Dual VVT-i)
• Displacement: 5,663cc
• Position: Crankshaft Main (Upper and Lower shells)
• Quantity: 5 pairs (10 shells total - full V8 main bearing set)
• Available Sizes: STD / +0.25mm / +0.50mm

Included Components

• 5x Upper Main Bearing Shells
• 5x Lower Main Bearing Shells

Product Description

The King MB5863MC is a standard-size MC Series crankshaft main bearing set engineered for the Toyota 3UR-FE 5.7L V8 i-Force engine, covering the Tundra, Sequoia, Land Cruiser, and Lexus LX570 from 2007 through 2022. The MC Series uses a bi-metal aluminum structure topped with King's K-340 nano-composite polymer coating - applied at the factory with no added wall thickness - delivering excellent anti-friction properties and seizure resistance particularly during cold starts and stop-and-go driving cycles where oil starvation risk is highest.

As a standard-size set, the MB5863MC fits 3UR-FE crankshafts at factory main journal diameter and installs without grinding or modification. It is the OE-replacement counterpart to the MB5863MC rod bearing set (CR8061MC), and the two are typically replaced together during a full engine rebuild. Always measure crankshaft main journal diameters with a precision micrometer before ordering - undersized variants are available under separate part numbers for reconditioned crankshafts.