At a glance
What can fail
A faulty bolt in the brake system may block fluid flow to a brake caliper, potentially causing no braking force on one wheel. You may notice reduced braking or the vehicle pulling to one side while braking.
What the fix does
McLaren will mail you instructions to visit a dealer. The dealer will inspect the brake hose banjo bolt on each caliper and replace any faulty bolts.
Summarized — see the official notice for exact wording, dates, and contacts.