O2 Oxygen Sensor Upstream Downstream for Nissan Altima (2013-2017) 2.5L

Direct-Fit Upstream & Downstream Oxygen Sensor Set for 2013-2017 Nissan Altima (L33)

What it Does: The Upstream and Downstream O2 Sensor Kit restores closed-loop air-fuel ratio management and catalyst monitoring on the 2013-2017 Nissan Altima to clear diagnostic check engine lights and normalize fuel trim levels.

The Stock Nissan Altima Sensor Degradation

Factory oxygen sensors on the L33 chassis degrade over repeated thermal cycling and continuous exhaust gas exposure. Within the QR25DE 2.5L powertrain, internal ceramic thimble elements experience slow response times, silica poisoning, and heater circuit burnout. This signal latency impedes the factory ECM's ability to maintain ideal stoichiometric closed-loop fueling, resulting in rich-running conditions, unburnt hydrocarbon build-up in the catalytic converter, and persistent diagnostic trouble codes such as P0130, P0138, and P0420.

The Engineering Solution

This matched upstream and downstream oxygen sensor set utilizes high-temperature planar zirconia ceramic sensing elements engineered for fast light-off times and continuous thermal endurance. Shielded in dual-layer stainless steel housings with laser-welded seams, these sensors resist thermal shock and silicone fouling. Precision-wound internal heating circuits facilitate rapid closed-loop transition, while OE-spec harness lengths and factory weather-pack connectors ensure plug-and-play installation without wire splicing or pin repinning.

What's Included

• 1x Upstream Oxygen Sensor (OE Part: 22693-3TA0B)
• 1x Downstream Oxygen Sensor (OE Part: 226A0-3TA0B)

Technical Specifications

Compatibility

• 2013-2017 Nissan Altima 2.5 Base Sedan 4-Door (2.5L 2500CC L4)
• 2013-2017 Nissan Altima 2.5 S Sedan 4-Door (2.5L 2500CC L4)
• 2013-2017 Nissan Altima 2.5 SV Sedan 4-Door (2.5L 2500CC L4)
• 2013-2017 Nissan Altima 2.5 SL Sedan 4-Door (2.5L 2500CC L4)
• 2016-2017 Nissan Altima 2.5 SR Sedan 4-Door (2.5L 2500CC L4)

Frequently Asked Questions & Fitment Warnings

Does this fit the L33 Altima?

Yes, this is a direct fit for the 2013-2017 Nissan Altima equipped with the QR25DE 2.5L engine. Does not fit 3.5L V6 (VQ35DE) models.

Are threads pre-coated with anti-seize lubricant?

Yes, sensor threads include high-temperature anti-seize compound directly out of the box to prevent galling into the exhaust bung during installation.

The Nissan Precision Standard

Calibrated specifically for Nissan's factory engine management system, this replacement set ensures accurate air-fuel tracking, factory throttle response, and emissions readiness.