Some of the Automotive clusters in GTA:

1. Automotive Parts Manufacturers’ Association
“APMA is Canada’s national association representing OEM producers of parts, equipment, tools, supplies and services for the worldwide automotive industry.
The Association was founded in 1952 and has over 400 members accounting for ninety percent, directly or indirectly of independent parts production in Canada. In 2006, automotive parts shipments were just less than $32 Billion and the industry employment level was over 92,000 people.
APMA’s fundamental objective is to promote the O.E. automotive supply manufacturing industry both domestically and internationally. The Association provides important representation to both Federal and Provincial Governments, supports regional government initiatives and creates and executes global marketing initiatives in order to develop trade and business opportunities for the membership.”
http://www.apma.ca/

2. Automotive Industries Association of Canada
“The Automotive Industries Association of Canada (AIA) is a national trade association representing the automotive aftermarket industry in Canada. The aftermarket is a $16.1 billion industry that employs more than 220,000 people. The industry is composed of companies that manufacture, distribute and install automotive replacement parts, accessories, tools, and equipment.
AIA represents manufacturers, re-builders, manufacturers agents, warehouse distributors, national distributors, buying groups, wholesalers, machine shops, retailers, and through its councils, the interests of collision repair shops and automotive service and repair outlets.
AIA’s mandate is to promote, educate and represent members in all areas that impact the growth and prosperity of the industry.”
http://www.aiacanada.com/index.cfm

3. AUTO 21
“It is a national research initiative supported by the Government of Canada through the Networks of Centres of Excellence Directorate and more than 110 industry, government and institutional partners.
AUTO21 was formed to focus Canadian research expertise on the task of improving and enhancing the global competitiveness of the Canadian automotive industry. The Network currently supports over 265 top researchers working at 42 academic institutions, government research facilities and private sector research labs across Canada.”
http://www.auto21.ca/home_e.html