Luckily, that’s the kind of lesson you only need to learn once and, thankfully, it’s not the only way to test a ... a bad plug, coil, ignition module, distributor, or spark plug wire.

I’ll show you exactly how to test your BMW spark plugs, ignition coils, and coil wiring without needing a multimeter—just using the kit provided. Whether it’s a misfire, bad coil packs, or ...