The Jaguar 420 didn't last very long, partially due to its own success, as the car released following it – the Jaguar XJ6 – effectively killed it, but used the 420 as its base. In this, the Jaguar 420 can be seen as a success as its replacement carried most of its mechanical parts on. The 420 is a rare car that you'll want to keep in proper working order with regular maintenance, such as regularly checking your 420 spark plugs and replacing them as needed. A single bad 420 spark plug can cause losses in performance as well as fuel efficiency, and will eventually lead to damage to the Jaguar 420's engine.
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Luckily, if you pay attention to your maintenance, it's possible to avoid these problems entirely, especially if you keep an extra set of 420 spark plugs on hand for when replacement time comes. At AutoAnything, we make it easy to keep your car running with our large selection of Jaguar 420 spark plugs. You'll find everything you need for Jaguar 420 spark plugs in our inventory, and you'll know you're getting the best possible price with our one-year lower price guarantee, so you know you're getting the best price for a full year following your purchase.