Mazda Oxygen Sensor 234-4044 L33M-18-861 Stable Output

Mazda oxygen sensor 234-4044 / L33M-18-861; directly replaces OEM number and also compatible with L33M-18-861B, L37K18861, L3AN-18-861, etc.; broad compatibility. Monitors exhaust oxygen concentration and feeds ECU to precisely control air-fuel ratio for efficient combustion. Fits Mazda3, Mazda6, CX-5, CX-7; replacement resolves high fuel consumption, weak acceleration, or excessive emissions. If idle unstable, MIL on, or fuel consumption rises, sensor likely needs replacement.