item(s) totaling $
See if this part fits a specific vehicle.
|This product doesnt fit any of your saved vehicles||Check Fit for another vehicle|
|Connector Type:||Direct fit|
|Thread Size:||M18 mm|
Do you have questions about this product?
Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.
Q:is this upstream downstream or does it matter, ?
A:The upstream sensor is the one closest to the engine while the downstream sensor is farthest from the engine. Your upstream sensor is the one that adjusts engine performance and the downstream sensor is getting info on emissions after the exhaust has gone through the cat. This Denso Oxygen Sensor Direct Fit with Part No. 234-4127 is an Upstream sensor only.