O2 Oxygen Sensor Upstream For Nissan Frontier Quest Sentra Xterra

Replace failing oxygen sensors on your Nissan with this direct-fit 4-pack—engineered to eliminate check engine lights, restore fuel economy, and fix rough idle issues common on 1990s-2000s models.

Fix the Most Common Check Engine Light Culprit

If you're getting a check engine light on your 1990s or early 2000s Nissan, there's a strong chance it's related to oxygen sensors. Research shows faulty O2 sensors are among the most common causes of CEL codes on these vehicles, triggering issues like decreased fuel mileage (sometimes drastically), rough idling, hesitation, and even failed emissions tests. Many Nissan owners report needing to replace upstream sensors around 100,000 miles, with symptoms including rotten egg smell from the exhaust (indicating overly rich fuel mixture) and noticeable power loss during acceleration.

This 4-pack of direct-replacement oxygen sensors addresses these problems with proper 4-wire configuration and OE-quality construction. Each sensor features a 450mm lead length for proper fitment and includes the factory-style connector for plug-and-play installation. Built to strict quality control standards, these sensors are designed to restore your Nissan's air-fuel ratio monitoring, bringing back proper fuel economy, smooth idle, and eliminating those frustrating check engine codes. The 4-pack gives you coverage for complete sensor replacement—many Nissan models from this era have 2-4 sensors (upstream and downstream, bank 1 and bank 2).

Key Features at a Glance

• Direct Plug-In Replacement: Factory-style 4-wire configuration with pre-attached connectors—no splicing or adapters required
• Proper Lead Length: 450mm sensor-to-lead measurement ensures correct fitment for your specific Nissan model
• OE Interchange Compatibility: Replaces part numbers 234-3089, 226900M200, 226900M210, SG1866, XF5Z9G444CA
• Quality Control Tested: Each sensor built and tested to strict standards for reliable performance and longevity
• Complete 4-Pack Coverage: Enough sensors to replace all positions on most Nissan models from this era

How It's Used: Installation & Fitment

Oxygen sensor replacement requires accessing sensors mounted in the exhaust system. Upstream sensors (Bank 1 Sensor 1, Bank 2 Sensor 1) are typically accessible from the engine compartment on the exhaust manifold or front exhaust pipe. Downstream sensors (Bank 1 Sensor 2, Bank 2 Sensor 2) are located after the catalytic converter and usually require accessing from underneath the vehicle. You'll need an oxygen sensor socket (available at auto parts stores) to remove the old sensors—they thread in like spark plugs but have wiring running through the socket. Disconnect the electrical connector, use the O2 sensor socket to unthread the old sensor, install the new sensor hand-tight then torque to specification (typically 33 lb-ft), and reconnect the wiring harness. After replacement, you'll need an OBD-II scanner to clear stored diagnostic codes and reset the check engine light. Many owners complete the job in 1-2 hours depending on how many sensors need replacement.

Product Durability & Material Details

These oxygen sensors use heated ceramic element technology that monitors exhaust oxygen content in real-time, sending voltage signals to your ECU for precise air-fuel ratio adjustment. The 4-wire design includes dedicated heating element wires for faster sensor warm-up and more accurate readings compared to older unheated designs. The sensors are engineered to resist contamination from oil, coolant, and silicone—common causes of premature O2 sensor failure. The factory-style connectors are water-resistant and designed for the engine bay environment. Research shows that on 1996+ vehicles, quality O2 sensors can last 100,000+ miles before needing replacement, though this decreases on older models or vehicles with fluid contamination issues.

Extra Info & Specifications

Fitment (Verify Your Model Before Ordering):

• 1984-1986, 1995-1997 Nissan 200SX with 1.8L L4
• 1994-1999 Nissan Sentra with 1.6L L4
• 1996-2000 Nissan Pathfinder with 3.3L V6
• 1998 Nissan Maxima with 3.0L V6
• 1998-2003 Nissan Frontier with 3.4L L4 (likely 2.4L—verify fitment)
• 1999-2002 Nissan Quest with 3.3L V6
• 2000-2003 Nissan Xterra with 2.4L L4 or 3.3L V6

Technical Specifications:

• Configuration: 4-wire heated oxygen sensor
• Lead Length: 450mm (sensor to electrical connector)
• Connector: Direct plug-in replacement (no splicing required)
• Interchange Numbers: 234-3089, 226900M200, 226900M210, SG1866, XF5Z9G444CA
• Quality Control: Built and tested to strict OE standards

Installation Notes:

• Requires oxygen sensor socket (available at auto parts stores or rental)
• Torque specification: Typically 33 lb-ft
• OBD-II scanner needed to clear check engine codes after installation
• Upstream sensors accessible from engine compartment
• Downstream sensors typically require accessing from underneath vehicle
• If replacing due to contamination, fix any oil/coolant leaks first to prevent damaging new sensors

Package Includes:

• 4x Heated oxygen sensors (4-wire configuration)
• Factory-style electrical connectors pre-attached
• 450mm lead length for proper fitment