The 1989 Australian Manufacturers' Championship was a CAMS sanctioned motor racing title for vehicle manufacturers. It was contested concurrently with the 1989 Australian Touring Car Championship over an eight round series with each round staged as a single race of approximately one hour's duration.
The series was open to Touring Cars complying with CAMS Group 3A regulations, commonly referred to as Group A Touring Cars. Cars competed in three engine capacity classes:
Points were awarded on a 9-6-4-3-2-1 basis to the top six finishers in each class at each round however only the highest scoring car of each make at each round could earn points. The best seven round results were retained by each manufacturer.
Note: Only half points were awarded for Round 3 at Lakeside as the initial race was stopped due to an accident and the duration of the restarted race was reduced to 30 minutes.