Upstream O2 Sensors Covers oxygen sensors located before the catalytic converter, crucial for accurate air-fuel ratio readings.
Downstream O2 Sensors Focuses on sensors located after the catalytic converter, important for monitoring emissions efficiency.
OEM O2 Sensors Original equipment manufacturer sensors designed to match factory specifications for the 2003 RAV4.
Universal Fit O2 Sensors Versatile oxygen sensors that can be adapted to fit the 2003 RAV4 with proper installation.
High-Performance O2 Sensors Enhanced sensors designed for quicker response and improved engine tuning.
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