After I updated my Android on my Samsung Note 3 Bluetooth car connection has become unreliable, can anyone please help?

[AC Question]

after updated andiod on my samsung note 3 Bluetooth car connection has become unreliable

to connect i have to first let my car connect to my iPhone then i have to manually connect the car from my note 3 handset, last number redial has also stopped

Im now an accident waiting to happen when driving

can anyone please help?