A bypass valve, which alleviates restricted oil flow in the event of a clogged filter.
An anti-drainback valve, which prevents oil from draining out of the engine and into the oil pan, helping to protect your engine from increased wear during cold starts.
A filter element which effectively filters contaminants and maintains the engine's lubrication capability during the maintenance interval. By comparison, a lesser quality filter element might clog during Toyota's recommended maintenance interval leading to engine wear, seizure or other problems. Some non-genuine oil filters do not meet all of Toyota's stringent specifications.