The 1990 Australian Manufacturers' Championship was open to manufacturers of cars complying with CAMS Group 3A Touring car regulations and was contested over a four-round series.

• Round 1, Sandown 500, Sandown Raceway, Victoria, 9 September
• Round 2, Tooheys 1000, Mount Panorama Circuit, Bathurst, New South Wales, 30 September
• Round 3, Ansett Air Freight Challenge, Adelaide Parklands, South Australia, 3 & 4 November
• Round 4, Nissan Sydney 500, Eastern Creek Raceway, New South Wales, 10 November

Rounds were run concurrently with those of the 1990 Australian Endurance Championship.

"Australian Motor Racing Year, 1990/91" suggests that the championship win was tied between Ford & Holden however both the CAMS Manual of Motor Sport (post 1990 editions) and www.camsmanual.com.au state that the title was awarded solely to the Ford Motor Company of Australia.

• Australian Motor Racing Year, 1990/91
• CAMS Manual of Motor Sport, 1990
• Racing Car News, December 1990

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