NGK O2 SENSORS 21547 oxygen sensor for the 2003-2008 Toyota Corolla 4-cylinder 1.8L and other vehicles sends the ECU constant closed-loop feedback on exhaust oxygen. It helps control the air-fuel ratio and alerts the OBDII system to possible fuel delivery or catalytic converter efficiency problems.
A check engine light or rising fuel use can come from a failing oxygen sensor. An exhaust leak, a worn catalytic converter or a fuel delivery fault can be behind them too, so track down the cause before you order. This listing is one sensor, and the 2003-2008 Toyota Corolla 4-cylinder 1.8L takes one.
It is an oxygen sensor for the 2003-2008 Toyota Corolla 4-cylinder 1.8L, the 2003-2008 Toyota Matrix 4-cylinder 1.8L and the 2003-2008 Pontiac Vibe 4-cylinder 1.8L.
Fit and size
Build and materials
Is 21547 the right O2 sensor for the 2003-2008 Toyota Corolla 4-cylinder 1.8L?
Yes. NGK O2 SENSORS 21547 fits the 2003-2008 Toyota Corolla 4-cylinder 1.8L, and that engine takes one sensor.
Does this oxygen sensor fit the 2003-2008 Toyota Matrix 4-cylinder 1.8L?
Yes. NGK O2 SENSORS 21547 fits the 2003-2008 Toyota Matrix 4-cylinder 1.8L, and this listing is a single sensor.
What hex size and thread does this oxygen sensor have?
The hex size is 7/8" (22mm) and the thread size is M18 - 1.5.
Is this NGK oxygen sensor heated, and what type is it?
Yes. It is a heated, switching zirconia type oxygen sensor.
Can a failing oxygen sensor turn on the check engine light?
Yes, it can. The sensor gives the ECU closed-loop feedback and helps alert the OBDII system to fuel delivery or catalytic converter efficiency problems. A shop can scan the car to find the actual cause.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
