Dayco PB1165N Engine Harmonic Balancer

Dayco PB1165N Harmonic Balancer

The Dayco PB1165N is a premium OEM replacement harmonic balancer for Subaru and Saab applications that require a neutral-balance crankshaft damper with dual integrated serpentine pulleys. It is built with a cast iron outer ring, timing marks, and a 24.01 mm crank bore for direct-fit service on select Subaru WRX STI, WRX, Impreza, Forester, Legacy, Outback, Baja, and Saab 9-2X models.

Key Features

• Brand Line: Premium OEM Replacement Balancer
• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine service
• Two integrated serpentine pulleys: 5-groove and 4-groove
• Timing marks included for service alignment
• Overall outside diameter: 133.00 mm (5.237 in.)
• Overall width: 48.80 mm (1.922 in.)
• Crank bore: 24.01 mm (0.946 in.)

Product Details

Dayco PB1165N is engineered as an OEM-style engine harmonic balancer for Subaru WRX STI, Subaru WRX, Subaru Impreza, Subaru Forester, Subaru Legacy, Subaru Outback, Subaru Baja, and Saab 9-2X applications. The dual serpentine pulley layout supports accessory drive routing, while the neutral balance configuration and timing marks help maintain proper crankshaft damping and service alignment. This part cross-references Dorman 594-166 for the same application.

What It Helps Address

• Crankshaft vibration from a worn or separated balancer
• Belt tracking issues related to pulley wear or damage
• Timing reference visibility problems during service
• Accessory drive noise caused by a deteriorated harmonic balancer
• Fitment issues when replacing an OE-style Subaru harmonic balancer

Installation Notes

Confirm crank bore, pulley configuration, and timing mark orientation before installation. Hardware is not included, and installation instructions are not included. Verify engine application against the listed fitment before service. Fits 2013-2021 Subaru WRX STI, N/A; Fits 1998-2014 Subaru Impreza, N/A; Fits 2013-2014 Subaru WRX, N/A; Fits 1998-2010 Subaru Forester, N/A; Fits 1997-2009 Subaru Legacy, N/A; Fits 2000-2009 Subaru Outback, N/A; Fits 2005-2006 Subaru 9-2X, N/A; Fits 2003-2006 Subaru Baja, N/A.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service in select Subaru and Saab applications, with specifications that match the listed engine requirements and pulley layout.