Connecting Rod Bushing Cummins 4059448 | 3679314, 151539, 405944800

High-Performance Connecting Rod Bushing for Cummins Engines

The Cummins 4059448 connecting rod bushing is a critical component designed to support the piston pin (wrist pin) within the small end of the connecting rod. Engineered to withstand extreme combustion pressures and high operating temperatures, this bushing ensures smooth rotational movement and prevents premature wear on vital engine internals. This part is also available under the numbers: 3679314, 151539, 405944800.

Engine Compatibility and Fitment

This premium replacement connecting rod bushing is specifically designed for heavy-duty diesel engines, offering a precise press-fit installation. It is compatible with the following engine models:

• Cummins ISX / ISX15 (with one-piece pistons and machined/saw-cut connecting rods)
• Cummins QSX / QSX15
• Cummins X15

Please verify your engine serial number (ESN) and existing part numbers before ordering to ensure exact compatibility. Professional installation and boring after installation may be required to achieve the specified clearance.

Cross-Reference / Interchange Part Numbers

This part replaces / is interchangeable with the following part numbers:

• 4059448
• 3679314
• 405944800
• 367931400
• 151539
• 151539E