This kit is meant to refresh the belt-drive components. The harmonic balancer is a common failure point on the N47 as the rubber dries out and cracks. While you are in there, replace the rest of the components associated with the serpentine belt.

Includes the Following:
Engine Harmonic Balancer — 11238512072
4x Engine Harmonic Balancer Bolt — 11238585220
Serpentine Belt — 11288519128
Drive Belt Tensioner — 11287810807
2x Belt Tensioner Bolt — 46517655585
Engine Water Pump — 11518516204
Engine Coolant Thermostat Gasket — 11518516207
Engine Coolant Thermostat — 11518512234
7x Hex Bolt with Washer (M6x30) — 07119906123
Antifreeze Coolant Concentrate (Blue)(Zerex G48)(1Gallon) — 861583

Fits the Following:
2014-2018 BMW 328d
2014-2017 BMW X3 28d