O2 Oxygen Sensor Upstream for Nissan Frontier (2010-2012) 2.5L
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Direct-Fit Upstream O2 Oxygen Sensor for 2010-2012 Nissan Frontier (D40)
What it Does: The Upstream O2 Oxygen Sensor monitors exhaust gas composition exiting the exhaust manifold on the 2010-2012 Frontier to ensure proper closed-loop air-fuel ratio control and maintain optimal fuel economy.
The Stock Nissan Frontier Sensor Degradation
Factory upstream air-fuel ratio sensors on the D40 platform are exposed to extreme thermal cycling and combustion particulates. Over time, silica contamination, carbon buildup, and internal heater element fatigue cause the sensor element to become sluggish. On the QR25DE 2.5L engine, a slow or failing upstream sensor delays closed-loop ECU adjustments, leading to rich running conditions, degraded MPGs, catalytic converter fouling, rough idle, and persistent DTCs like P0130 or P0133.
The Engineering Solution
This direct-fit upstream sensor utilizes a fast-reacting zirconia ceramic sensing thimble with a rugged platinum electrode to accurately measure lambda across transient engine loads. Encased in a laser-welded, double-protection 304 stainless steel housing, the internal element resists thermal shock and mechanical vibration. Factory-pinned terminal connectors and OEM-grade harness heat sleeving allow clean routing without cutting or splicing, maintaining signal integrity back to the ECM under high underhood temperatures.
What's Included
- 1PCS Oxygen Sensor (Upstream Position)
Technical Specifications
| Fitment | 2010-2012 Nissan Frontier |
|---|---|
| Engine / Chassis | QR25DE (2.5L I4) / D40 |
| Stock Output | 152 hp / 171 lb-ft |
| Replaces OEM Part # | S4, 9038, 234-9038, 234-9038B, 1821382Z00, 22693-1AA0A, 22693-1AA0B, 22693-8W90A, 22693-ET000, 22693-JA00B, 22693-ZE00A, 22693-ZJ60B, 226931AA0A, 226931AA0B, 226938W90A, 22693ET000, 22693JA00B, 22693ZE00A, 22693ZJ60B, 250-54037, 250-54109, 25054037, 25054109, 25679, 15380B |
Compatibility
- 2010 Nissan Frontier 2.5L L4 (Upstream)
- 2011 Nissan Frontier 2.5L L4 (Upstream)
- 2012 Nissan Frontier 2.5L L4 (Upstream)
Frequently Asked Questions & Fitment Warnings
Does this fit the D40 Frontier?
Yes, this is a direct fit for the 2010-2012 Nissan Frontier equipped with the QR25DE 2.5L engine. Does not fit 4.0L V6 (VQ40DE) models or downstream sensor positions.
Should anti-seize be applied to the threads before installation?
Yes, apply a light coat of high-temperature sensor-safe anti-seize to the threads only, ensuring none touches the sensor snout or tip.
The Nissan Durability Caliber
Built to handle severe commercial duty cycles, daily hauling, and unpaved job sites, this replacement upstream sensor restores target lambda feedback for reliable truck performance under sustained load.
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