Bosch Gen 4 left hand crankshaft bearing. Part No PLB40521 
Performance Line / CX Crankshaft O-rings (pair) Part No PLB 00529
$4.71
These O-rings sit below the crankshaft bearings to prevent water ingress under the bearing itself.
These O-rings sit below the crankshaft bearings to prevent water ingress under the bearing itself.
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