Your Toyota 4Runner is sturdy and capable. Don't let it leave you stranded in the rugged outdoors due to a failing 4Runner O2 sensor. Restore your 4Runner's responsiveness, peak fuel economy and reduce emissions by replacing the sensor every 30,000 to 50,000 miles.
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O2 sensors measure your 4Runner's oxygen levels in the exhaust to determine the appropriate fuel/air mixture. The faster the sensors react to these changes in oxygen levels the more efficient your 4Runner runs in terms of emissions, gas mileage and fuel control. Signs of a waning sensor include the check engine light, increased emissions, poor fuel economy, hesitation, stalling and rough idle. Whether you are exploring the urban jungle or the great outdoors, you want your 4Runner to function at its best. Purchase your Toyota 4Runner replacement oxygen sensors from AutoAnything, and enjoy our 1-Year, Lower Price Guarantee.