Review on FIREMOTOO Ignition Compatible Corolla Matrix Replacement Parts by Seth Bushey

Installed with no problems, looks like the manufacturer put dielectric grease in the covers. Fixed random misfire code. The bearing coils may have been damaged during overheating due to a leaking water pump front seal. On this occasion I went to a quick grease shop to drain and refill their machine. They only use "generic" antifreeze, not the pink variety that Toyota installs, and this may have something to do with installing three spare water pumps. It's safer to buy pink stuff. Installed today so durability is unknown as they cost less than half the Toyota OEM price. The reviews are very good, I will update if there are any problems. Spark plugs are iridium and new, so most likely there will be no overvoltage due to too large gaps.