The Pressure Release Valve: Oil filters clog when exposed to excess contaminants. This clogging can restrict the flow of oil to the engine causing severe damage. The Pressure Relief Valve of a Genuine Toyota Oil Filter opens only when the filter is clogged allowing oil to flow to the engine. The valve on some non-genuine Toyota oil filters open at lower pressures, allowing unfiltered oil to the engine even when the filter is not clogged.

The Filter Element: The Toyota approved element effectively filters contaminants while meeting all Toyota Parts specifications for oil flow. By comparison, a lesser quality element may clog over time, which could lead to engine seizure or other potential engine problems. Some non-genuine Toyota oil filters do not meet Toyota's stringent specifications.

The Anti-Drainback Valve: Genuine Toyota Oil Filters feature an Anti-Drainback Valve that prevents oil from draining out of the engine and into the oil pan. This helps protect your engine from increased wear during cold-starts.