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02-03 Nissan Altima/Sentra 2.5L 3.5L Front Oxygen Sensor
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$140.00
Sale price$109.99
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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.
✓ Ships from FL Warehouse✓ In-House Quality Check✓ Direct-from-Warehouse
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.
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**Rates from 0%-36% APR. Payment options through Shop Pay Installments, are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers https://www.affirm.com/licenses.
02-03 Nissan Altima/Sentra 2.5L 3.5L Front Oxygen Sensor
