Frequently asked questions

Can I upgrade to iridium spark plugs if my car came with copper plugs?
In most cases, yes – iridium plugs are backward-compatible and will last much longer. However, always check your owner’s manual or use our Shop by Vehicle tool to confirm the right type for your engine.
Do I need to understand spark plug codes to buy the right one?
Not at all. Codes are useful for professionals, but the easiest way is to use our Shop by Vehicle tool — enter your rego or model and we’ll match the correct Bosch or NGK spark plugs for your car.