4 unsuccessful repairs when 2 occur within shorter of 1 year or 12,000 miles and other 2 occur within shorter of 1 year or 12,000 miles immediately following second repair attempt, or 2 unsuccessful repairs of a serious safety defect when 1 occurred within shorter of 1 year or 12,000 miles and other occurred within shorter of 1 year or 12,000 miles immediately following first repair, or 30 calendar days out of service within shorter of 2 years or 24,000 miles and at least 2 attempts were made within shorter of 1 year or 12,000 miles.