There is only one type of spark plug, and this is it. Don’t attempt to buy any other type, as it is crucial for stratified charge to function properly.
FUN FACT: Bosch mistakenly advertised their spark plugs as suitable for this engine - it is a mistake they decided not to fix! They won't work.
One and only NGK (Made specifically for N43/N53)
PART CODE: NGK ZKBR7A-HTU
For this spark plug you need a special thin-walled 14mm 12pt. socket.
