Diagram reference number 2 in the image below:
" Fitment: 2008 TOYOTA COROLLA CE - 4 door

Application Notes: Japan Built

Category: Ignition

SubCategory: Secondary Ignition

Position: General

Part Number: 9091901240


This is a Spark Plug that fits the 2008 TOYOTA COROLLA CE - 4 door with the 1ZZFE engine. The Spark Plug is designed by TOYOTA to be part of the Ignition-Secondary Ignition. The Spark Plug has a position on the vehicle of General. The 2008 TOYOTA COROLLA Spark Plug is a factory made TOYOTA OEM part and it comes with a 12 month 12,000 mile warranty (parts only). Do not be fooled by an aftermarket TOYOTA COROLLA Spark Plug! Buy a factory TOYOTA part and receive peace of mind!
This factory part has a part number of 9091901240.