Spark plugs. NGK 4 lyfe
NGK spark plugs are preferred in rotary engine (RE) Mazdas and Nippondenso is the only acceptable substitute that I ever found. We dealership technicians, always found it remarkable how a set of Champion or AC spark plugs could instantly cripple a rotary powered Mazda.
My 2017 Jetta SEL with LFER7BHX 9512 plugs starts/runs fine at 50076 miles, 0-100 degrees F.
You can run NGK Rutheniums, i run them on with my is20 and no complaints either.
I swapped for Rutheniums, No complaints and its a easy job
Stick to NGK R7437s. They are pricey but the best plug for a tuned car forsure. I inspect the gap every 5k miles and replace every 10k. Mine are gapped to .022
I’d go with the recommended NGKs, buy from fcp euro and you only need to pay for them once. Those are what I run on APR stage 2.
I went ahead with an NGK Laser Iridium. Compared the ones from the engine and the new ones and were identical in shape and form. It does seem to work fine after testing it.
NGK and Bosch are the same ones as the Genuine BMW ones. The latter are just rebranded and marked up.
Recently i changed my spark plugs DENSO IRIDIUM IK22 with NGK BKR7E gapped at 0.28inch-0,70mm. The car became very laggy, the throttle response got worse, much more turbo lag and major lost of power. Also im going back with the Densos.
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