BrokeScholar’s team of editors work 24/7 to update this page with active promo codes, coupons and discounts for Spark Plugs. If you cannot find the deal you are looking for, try following Spark Plugs on Facebook, Twitter and Instagram pages. Often Spark Plugs will release special promo codes to their followers. Are you a student? Check to see if Spark Plugs has a student discount to save even more. If you still can’t find a deal at Spark Plugs, bookmark this page and check back frequently for the latest offers.