Dayco PB1797N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1797N

The Dayco PB1797N is a premium OEM replacement harmonic balancer for select BMW turbocharged applications. It is built with a neutral balance design, a cast iron outer ring, and an integrated 8-groove serpentine pulley for direct-fit engine service.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine operation
• Integrated 1-groove serpentine pulley with 8 grooves
• Overall outside diameter: 7.493 in. (190.30 mm)
• Overall width: 2.126 in. (54.00 mm)
• Crank bore: 1.497 in. (38.00 mm)
• No timing marks, crank trigger/exciter plate, woodruff key, or included hardware

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct replacement fitment and OE-style construction for engine service. The PB1797N harmonic balancer is specified for BMW applications that use a serpentine accessory drive and a neutral-balance crankshaft setup. It is a practical replacement for worn, cracked, or out-of-round balancers on BMW 535i, 335i, X5, X6, and related models, including select 640i and M2 applications. Part number PB1797N is also a useful reference when sourcing the correct BMW harmonic balancer for 2010-2019 vehicles listed below.

Compatible With: Fits 2013-2019 BMW 640i Gran Coupe, N/A; Fits 2014-2019 BMW 640i xDrive Gran Coupe, N/A; Fits 2011-2019 BMW X6, N/A; Fits 2012-2018 BMW 640i, N/A; Fits 2014-2018 BMW 640i xDrive, N/A; Fits 2016-2018 BMW M2, N/A; Fits 2015-2018 BMW X4, N/A; Fits 2011-2018 BMW X5, N/A; Fits 2010-2017 BMW 535i GT, N/A; Fits 2011-2017 BMW 535i GT xDrive, N/A; Fits 2011-2017 BMW X3, N/A; Fits 2014-2016 BMW 335i GT xDrive, N/A; Fits 2014-2016 BMW 435i, N/A; Fits 2015-2016 BMW 435i Gran Coupe, N/A; Fits 2014-2016 BMW 435i xDrive, N/A; Fits 2015-2016 BMW 435i xDrive Gran Coupe, N/A; Fits 2011-2016 BMW 535i, N/A; Fits 2011-2016 BMW 535i xDrive, N/A; Fits 2012-2016 BMW ActiveHybrid 5, N/A; Fits 2014-2016 BMW M235i, N/A; Fits 2015-2016 BMW M235i xDrive, N/A; Fits 2011-2015 BMW 335i, N/A; Fits 2014-2015 BMW 335i xDrive, N/A; Fits 2013-2015 BMW 740i, N/A; Fits 2013-2015 BMW 740Li, N/A; Fits 2013-2015 BMW 740Li xDrive, N/A; Fits 2013-2015 BMW ActiveHybrid 3, N/A; Fits 2013-2015 BMW ActiveHybrid 7, N/A; Fits 2014-2015 BMW X1, N/A.

What It Can Help Address

• Crankshaft vibration from a worn harmonic balancer
• Serpentine belt drive issues caused by pulley wear
• Engine accessory drive noise related to balancer deterioration
• Visible cracking, wobble, or separation in the original balancer
• Incorrect replacement selection when matching BMW OE-style fitment

Installation Notes

Verify crank bore, overall diameter, width, and pulley groove count before installation. This balancer does not include hardware, installation instructions, timing marks, a crank trigger/exciter plate, or a woodruff key. Confirm the engine uses a neutral-balance configuration and the correct serpentine belt routing before service. Part number PB1797N should be matched to the vehicle application exactly as listed.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service in OE-style engine applications. For BMW 535i, 335i, X5, X6, and related models, PB1797N provides a specification-driven replacement option with the dimensions and pulley configuration needed for proper fitment.