Macro level
-Growth in new registered vehicles 2013-2018: 2.3% (Australian bureau of statistics), although note a decline since 2003-2008: 3% (Australian bureau of statistics)
-Average age of cars 2015-2018 stable at: 10.5 years (Australian bureau of statistics)
-Im guessing the average age will increase with stagnation of wage growth currently putting pressure on consumers to hold off buying new cars. Aging cars will need repairs and replacement parts meaning increased demand for aftermarket parts
-Global aftermarket parts industry is projected to grow at 3% p.a out to 2030 (McKinsey & Co.)