02-03 Nissan Altima/Sentra 2.5L 3.5L Front Oxygen Sensor
K2 Industries
02-03 Nissan Altima/Sentra 2.5L 3.5L Front Oxygen Sensor
Check fitment before ordering
Match the year, make, model, trim and engine in the product details. Review mounting requirements and vehicle modifications. Ask us about this part.
Eligible returns within 30 days of receipt. Items must be unused, with tags and original packaging. Contact Lee Mods before sending anything back. Lee Mods pays return shipping for eligible U.S. returns; no restocking fee. See Returns & Exchanges for full conditions.
02-03 Nissan Altima/Sentra 2.5L 3.5L Front Oxygen Sensor
Direct-fit O2 sensor for Altima and Sentra—critical for fuel trim and emissions monitoring. Factory replacement part engineered to match OEM specifications and sensor voltage response. Handles both the 2.5L and 3.5L engine variants across 2002–2003 model years.
Key Features
- Front-position mounting - Reads exhaust gas before the catalytic converter for accurate closed-loop fuel control
- OEM-equivalent construction - Matches factory sensor resistance and thermal response for no CEL issues
- Dual-engine compatibility - Works with both 2.5L and 3.5L powerplants in the same model year
Specs
- Oxygen sensor assembly, front-mount position
- 2002–2003 Nissan Altima and Sentra
- Quantity: 1 sensor
Whats Included
- Oxygen sensor
Frequently Asked Questions
Will this throw a check engine light if my old sensor is bad?
No—replacing a failing O2 sensor clears the fault condition once the new sensor reads steady voltage to the ECU. If the light returns after install, the problem lies elsewhere in the fuel or emissions system.
Do I need any special tools or an oxygen sensor socket to install this?
An O2 sensor socket (usually 22mm or 7/8") makes removal and installation easier, but a wrench works if you have clearance. The sensor threads directly into the exhaust manifold or downpipe—no adapters needed.
Can I install this myself, or do I need a shop?
DIY installation is straightforward if you're comfortable working around the exhaust. Disconnect the sensor electrical connector, unscrew the old sensor, thread in the new one, and reconnect. Let the exhaust cool first.
Your vehicle
Select a vehicle to check the supplied application records for this part.
Choose or change vehicle →Product reference & ordering help
Supplier & part identification
K2 Industries
| Option | SKU / part reference |
|---|---|
| Standard | K2-10836-NIS-006-EC |
Vehicle compatibility
Read the application years, model, trim, engine and exclusions in the description above. A make-level collection or product recommendation alone does not confirm fitment.
Request fitment help →Installation & specifications
Review the manufacturer’s specifications and installation notes above. Confirm required mounting hardware, tools and modifications before ordering. If instructions are not supplied, contact us with the part reference.
Shipping expectations
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Shipping & delivery informationManufacturer warranty
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Warranty information