DENSO Auto Parts Oxygen Sensor P/N:234-4156
DENSO Auto Parts 234-4249 oxygen sensor for the 2008-2009 Chevrolet Impala V8 5.3L and other vehicles senses the oxygen level in the exhaust and reports it to the engine computer. This DENSO Auto Parts oxygen sensor goes in the downstream position and is a direct-fit replacement.
A worn oxygen sensor can show up as a check engine light, rougher running or lower fuel economy. An exhaust leak, a misfire or a fuel delivery problem can be behind those signs too, so find the cause before you buy a sensor.
This listing is one sensor. The vehicles it fits include the 2008-2009 Chevrolet Impala V8 5.3L, the 2008-2009 Buick LaCrosse V8 5.3L and the 2008-2009 Buick Allure V8 5.3L, and each takes one.
Fit and size
Build and materials
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
Does this Chevy Impala oxygen sensor fit a 2008-2009 Chevrolet Impala V8 5.3L?
Yes, DENSO Auto Parts 234-4249 fits the 2008-2009 Chevrolet Impala V8 5.3L, and it takes one. If your car is not named here, find it in the "Vehicles it fits" section.
Can I use this Buick LaCrosse oxygen sensor on a 2008-2009 Buick LaCrosse V8 5.3L?
Yes. This downstream sensor fits the 2008-2009 Buick LaCrosse V8 5.3L, and that car takes one.
How many wires does the DENSO 234-4249 oxygen sensor have?
It has four wires, a female connector and an 11.02 in wiring harness. DENSO 234-4249 is a heated, narrow-band sensor.
Which signs can show up when a downstream oxygen sensor wears out?
A check engine light, rough running or lower fuel economy can show up. A shop can test the sensor with the engine running to confirm.
Does this oxygen sensor have a filter or protective layers?
Yes, a PTFE filter blocks contaminants, an aluminum oxide trap layer is designed to protect the ceramic element from silicone and lead poisoning, and the housing is laser-welded stainless.
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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.