Looking at that diagram of all those different alloys used in modern cars, can anyone comment on how galvanic corrosion is avoided at the contact points between

Looking at that diagram of all those different alloys used in modern cars, can anyone comment on how galvanic corrosion is avoided at the contact points between those that are far from each other on the galvanic chart? Do they use some material in between as a physical buffer or use the sacrificial material technique or do they just not care?