Expire is not really the right term; but effectively yes. In general a cheque older than six months will be considered stale-dated and will not be honoured. Reference the Canadian Payments Association FAQ.
SKYACTIV is a brand name for a series of technologies developed by Mazda which increase fuel efficiency and engine output. The initial announcement of the SKYACTIV technologies include new engines, transmissions, body, and chassis, which appeared in Mazda products from 2011.
Mazdaâs i-Activ predictive AWD. Mazda has introduced a predictive form of all-wheel-drive on its subcompact (CX-3) and compact (CX-5) crossover SUVs. It will also be on the next generation full-size Mazda CX-9 crossover later this year. Normally the i-Activ system delivers 98% of the power to the front wheels.