The S20139 electronic throttle body is designed specifically for 1.8L 4-cylinder (L4) engines across various Toyota, Scion, and select Pontiac vehicles.Complete Fitment ListThe part fits the following vehicles, specifically models equipped with the 1.8L engine types (such as the 2ZR-FE):Toyota Corolla: 2011–2019 (All trims including L, LE, LE Eco, S, SE, XLE, XSE)Toyota Corolla iM: 2017–2018Toyota Matrix: 2011–2014Scion iM: 2016Pontiac Vibe: 2009–2010 (Note: Compatibility for 2009–2011 models applies to specific configurations without an EVAP port on the throttle body housing).Component Technical SpecificationsTo verify this part physically matches the unit you are replacing, look for these design specifications:Actuation: Drive-by-Wire (DBW) electronic controlElectrical Connector: 6-Pin main terminalBore Measurement: 55 mm inner diameterImportant Installation RequirementAfter bolting the new unit in place, you must perform an electronic throttle relearn / initialization sequence.Leave the engine off.Turn your ignition key to the ON position (do not crank the starter).Wait 30 seconds to allow the computer to calculate and save the new butterfly valve stop positions.Turn the key off, then start the engine normally.