Collection: Ignition coils

Ignition coils – choosing the right coil for a petrol engine

An ignition coil converts the vehicle's electrical voltage into the high voltage required to create a spark at the spark plug. Cars use both individual and combined coils, which differ in control systems, housings and mounting. This category includes ignition coils for various engines, including NGK and MaXgear products.

How can you recognise a faulty ignition coil?

Rough engine running, jerking, loss of power, misfires or an engine warning light may indicate an ignition system problem. However, these symptoms alone do not confirm a faulty coil. Worn spark plugs, damaged wiring, injectors and mechanical engine problems may cause similar symptoms.

How do you select an ignition coil?

Compare the OE number and replacement part number, engine code, production date, connector type, number of contacts and mounting method. Check whether the listing is for one coil, a combined module or a set. Similar appearance does not guarantee electrical compatibility.

Should all ignition coils be replaced together?

The extent of replacement depends on diagnosis, the condition of other components and vehicle manufacturer guidance. Check spark plugs, sockets and connectors before fitting. Work safely around high-voltage ignition systems and follow the service manual. See also ignition system parts and spark plugs.