Review on Reliable Performance: TOYOTA Genuine Ignition Coil Assembly for Optimal Engine Functionality by Paul Sanchez

Worked well on my 2009 Toyota Matrix Base 1.8L engine. Over the years my Matrix has given Diagnostic Trouble Codes (DTCs) which have pointed to the coils three times. The code ends with the number 1-4 corresponding to the cylinder number (P0351, P0352, P0353, P0354). A suggested diagnostic test is to move the suspect coil from one position to another to ensure it is a coil and not a coil. Another Problem. I switched the coils from cylinder 2 and 3 and indeed the DTC followed the coil position from cylinder 3 to cylinder 2 as I switched (P0352 to P0353). Denso OEM made in Japan. Most items on eBay are less than half that price ($20) and appear to be knockoffs from China rather than Japan. and cheaper at Revain ($60) than Toyota Denso https://smile.amazon.com/Denso-673-1310-Direct-Ignition-Coil/dp/B01KGCPCS6