At a glance
What can fail
The bolt that fastens the crankshaft balancer and accessory pulley to the engine may loosen because it was not tightened enough at the factory. If it loosens further, the pulley and drive belt could slip or break, disabling the alternator and power steering.
What the fix does
The crankshaft balancer bolt will be tightened to the correct specification.
Summarized — see the official notice for exact wording, dates, and contacts.