About Jiffypartz (Newmarket Auto Parts Group) Jiffypartz, operating as Newmarket Auto Parts Group, is a family-owned and operated distributor of aftermarket automotive parts serving Central Ontario. With two locations—200 Mulock Drive, Newmarket, ON (905-235-1115) and 422 Dunlop Street West, Barrie, ON (705-725-1114)—Jiffypartz supplies brake pads, brake rotors, control arms, engine parts, body parts, and a full range of car parts to retail customers, licensed mechanic shops, and dealerships across Newmarket, Aurora, Stouffville, East Gwillimbury, Bradford, Innisfil, Barrie, Oro Medonte, Cookstown, Alliston, Fergus, Midhurst, Angus, and surrounding communities. The company is transitioning its web presence from newmarketautoparts.com to its new home at jiffy.parts.